New vulnerabilities from the NVD: CVE-2016-5236 | | Cross-Site-Scripting (XSS) vulnerabilities in F5 WebSafe Dashboard 3.9.5 and earlier, aka F5 WebSafe Alert Server, allow privileged authenticated users to inject arbitrary web script or HTML when creating a new user, account or signature. Published at: July 01, 2019 at 07:15PM View on website July 01, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2016-5235 | | A Cross Site Scripting (XSS) vulnerability in versions of F5 WebSafe Dashboard 3.9.x and earlier, aka F5 WebSafe Alert Server, allows an unauthenticated user to inject HTML via a crafted alert. Published at: July 01, 2019 at 07:15PM View on website July 01, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8408 | | An issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings recorded by the device. It seems that the GET parameters passed in this request (to test if SMB credentials and hostname sent to the device work properly) result in being passed as commands to a "system" API in the function and thus result in command injection on the device. If the firmware version is dissected using binwalk tool, we obtain a cramfs-root archive which contains the filesystem set up on the device that contains all the binaries. The binary "cgibox" is the one that has the vulnerable function "sub_7EAFC" that receives the values sent by the GET request. If we open this binary in IDA-pro we will notice that this follows a ARM little endian format. The function sub_7EAFC in IDA pro is identified to be receiving the values sent in the GET request and the value set in GET parameter "user" is extracted in functio n sub_7E49C which is then passed to the vulnerable system API call. Published at: July 02, 2019 at 07:15PM View on website July 02, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8411 | | An issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings recorded by the device. It seems that the POST parameters passed in this request (to test if email credentials and hostname sent to the device work properly) result in being passed as commands to a "system" API in the function and thus result in command injection on the device. If the firmware version is dissected using binwalk tool, we obtain a cramfs-root archive which contains the filesystem set up on the device that contains all the binaries. The library "libmailutils.so" is the one that has the vulnerable function "sub_1FC4" that receives the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows an ARM little endian format. The function sub_1FC4 in IDA pro is identified to be receiving the values sent in the POST request and the value set in POST parameter "receiver1" is extracted in function "sub_15AC" which is then passed to the vulnerable system API call. The vulnerable library function is accessed in "cgibox" binary at address 0x00023BCC which calls the "Send_mail" function in "libmailutils.so" binary as shown below which results in the vulnerable POST parameter being passed to the library which results in the command injection issue. Published at: July 02, 2019 at 10:15PM View on website July 03, 2019 at 12:19AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8407 | | An issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of changing the administrative password for the web management interface. It seems that the device does not implement any cross-site request forgery protection mechanism which allows an attacker to trick a user who is logged in to the web management interface to change the user's password. Published at: July 02, 2019 at 10:15PM View on website July 03, 2019 at 12:19AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8404 | | An issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings recorded by the device. It seems that the POST parameters passed in this request (to test if email credentials and hostname sent to the device work properly) result in being passed as commands to a "system" API in the function and thus result in command injection on the device. If the firmware version is dissected using binwalk tool, we obtain a cramfs-root archive which contains the filesystem set up on the device that contains all the binaries. The library "libmailutils.so" is the one that has the vulnerable function "sub_1FC4" that receives the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows an ARM little endian format. The function sub_1FC4 in IDA pro is identified to be receiving the values sent in the POST request and the value set in POST parameter "receiver1" is extracted in function "sub_15AC" which is then passed to the vulnerable system API call. The vulnerable library function is accessed in "cgibox" binary at address 0x0008F598 which calls the "mailLoginTest" function in "libmailutils.so" binary as shown below which results in the vulnerable POST parameter being passed to the library which results in the command injection issue. Published at: July 02, 2019 at 10:15PM View on website July 03, 2019 at 12:19AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8417 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device requires that a user logging into the device provide a username and password. However, the device allows D-Link apps on the mobile devices and desktop to communicate with the device without any authentication. As a part of that communication, the device uses custom version of base64 encoding to pass data back and forth between the apps and the device. However, the same form of communication can be initiated by any process including an attacker process on the mobile phone or the desktop and this allows a third party to retrieve the device's password without any authentication by sending just 1 UDP packet with custom base64 encoding. The severity of this attack is enlarged by the fact that there more than 100,000 D-Link devices out there. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8416 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device runs a custom daemon on UDP port 5978 which is called "dldps2121" and listens for broadcast packets sent on 255.255.255.255. This daemon handles custom D-Link UDP based protocol that allows D-Link mobile applications and desktop applications to discover D-Link devices on the local network. The binary processes the received UDP packets sent from any device in "main" function. One path in the function traverses towards a block of code that processing of packets which does an unbounded copy operation which allows to overflow the buffer. The custom protocol created by Dlink follows the following pattern: Packetlen, Type of packet; M=MAC address of device or broadcast; D=Device Type;C=base64 encoded command string;test=1111 We can see at address function starting at address 0x0000DBF8 handles the entire UDP packet and performs an insecure copy using strcpy function at address 0x0000DC88. This res ults in overflowing the stack pointer after 1060 characters and thus allows to control the PC register and results in code execution. The same form of communication can be initiated by any process including an attacker process on the mobile phone or the desktop and this allows a third-party application on the device to execute commands on the device without any authentication by sending just 1 UDP packet with custom base64 encoding. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8415 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device has a custom telnet daemon as a part of the busybox and retrieves the password from the shadow file using the function getspnam at address 0x00053894. Then performs a crypt operation on the password retrieved from the user at address 0x000538E0 and performs a strcmp at address 0x00053908 to check if the password is correct or incorrect. However, the /etc/shadow file is a part of CRAM-FS filesystem which means that the user cannot change the password and hence a hardcoded hash in /etc/shadow is used to match the credentials provided by the user. This is a salted hash of the string "admin" and hence it acts as a password to the device which cannot be changed as the whole filesystem is read only. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8414 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The binary orthrus in /sbin folder of the device handles all the UPnP connections received by the device. It seems that the binary performs a sprintf operation at address 0x0000A3E4 with the value in the command line parameter "-f" and stores it on the stack. Since there is no length check, this results in corrupting the registers for the function sub_A098 which results in memory corruption. Published at: July 02, 2019 at 11:15PM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8413 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device runs a custom daemon on UDP port 5978 which is called "dldps2121" and listens for broadcast packets sent on 255.255.255.255. This daemon handles custom D-Link UDP based protocol that allows D-Link mobile applications and desktop applications to discover D-Link devices on the local network. The binary processes the received UDP packets sent from any device in "main" function. One path in the function traverses towards a block of code that handles commands to be executed on the device. The custom protocol created by D-Link follows the following pattern: Packetlen, Type of packet; M=MAC address of device or broadcast; D=Device Type;C=base64 encoded command string;test=1111. If a packet is received with the packet type being "S" or 0x53 then the string passed in the "C" parameter is base64 decoded and then executed by passing into a System API. We can see at address 0x00009B44 that the string re ceived in packet type subtracts 0x31 or "1" from the packet type and is compared against 0x22 or "double quotes". If that is the case, then the packet is sent towards the block of code that executes a command. Then the value stored in "C" parameter is extracted at address 0x0000A1B0. Finally, the string received is base 64 decoded and passed on to the system API at address 0x0000A2A8 as shown below. The same form of communication can be initiated by any process including an attacker process on the mobile phone or the desktop and this allows a third-party application on the device to execute commands on the device without any authentication by sending just 1 UDP packet with custom base64 encoding. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8412 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device has a custom binary called mp4ts under the /var/www/video folder. It seems that this binary dumps the HTTP VERB in the system logs. As a part of doing that it retrieves the HTTP VERB sent by the user and uses a vulnerable sprintf function at address 0x0000C3D4 in the function sub_C210 to copy the value into a string and then into a log file. Since there is no bounds check being performed on the environment variable at address 0x0000C360 this results in a stack overflow and overwrites the PC register allowing an attacker to execute buffer overflow or even a command injection attack. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8410 | | An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The binary rtspd in /sbin folder of the device handles all the rtsp connections received by the device. It seems that the binary performs a memcpy operation at address 0x00011E34 with the value sent in the "Authorization: Basic" RTSP header and stores it on the stack. The number of bytes to be copied are calculated based on the length of the string sent in the RTSP header by the client. As a result, memcpy copies more data then it can hold on stack and this results in corrupting the registers for the caller function sub_F6CC which results in memory corruption. The severity of this attack is enlarged by the fact that the same value is then copied on the stack in the function 0x00011378 and this allows to overflow the buffer allocated and thus control the PC register which will result in arbitrary code execution on the device. Published at: July 02, 2019 at 11:15PM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8409 | | An issue was discovered on D-Link DCS-1130 devices. The device requires that a user logging to the device to provide a username and password. However, the device does not enforce the same restriction on a specific URL thereby allowing any attacker in possession of that to view the live video feed. The severity of this attack is enlarged by the fact that there more than 100,000 D-Link devices out there. Published at: July 02, 2019 at 11:15PM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8406 | | An issue was discovered on D-Link DCS-1130 devices. The device provides a crossdomain.xml file with no restrictions on who can access the webserver. This allows an hosted flash file on any domain to make calls to the device's webserver and pull any information that is stored on the device. In this case, user's credentials are stored in clear text on the device and can be pulled easily. It also seems that the device does not implement any cross-site scripting forgery protection mechanism which allows an attacker to trick a user who is logged in to the web management interface into executing a cross-site flashing attack on the user's browser and execute any action on the device provided by the web management interface which steals the credentials from tools_admin.cgi file's response and displays it inside a Textfield. Published at: July 02, 2019 at 11:15PM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8405 | | An issue was discovered on D-Link DCS-1130 and DCS-1100 devices. The binary rtspd in /sbin folder of the device handles all the rtsp connections received by the device. It seems that the binary loads at address 0x00012CF4 a flag called "Authenticate" that indicates whether a user should be authenticated or not before allowing access to the video feed. By default, the value for this flag is zero and can be set/unset using the HTTP interface and network settings tab as shown below. The device requires that a user logging to the HTTP management interface of the device to provide a valid username and password. However, the device does not enforce the same restriction by default on RTSP URL due to the checkbox unchecked by default, thereby allowing any attacker in possession of external IP address of the camera to view the live video feed. The severity of this attack is enlarged by the fact that there more than 100,000 D-Link devices out there. Published at: July 02, 2019 at 11:15PM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-11580 | | Blipcare Wifi blood pressure monitor BP700 10.1 devices allow memory corruption that results in Denial of Service. When connected to the "Blip" open wireless connection provided by the device, if a large string is sent as a part of the HTTP request in any part of the HTTP headers, the device could become completely unresponsive. Presumably this happens as the memory footprint provided to this device is very small. According to the specs from Rezolt, the Wi-Fi module only has 256k of memory. As a result, an incorrect string copy operation using either memcpy, strcpy, or any of their other variants could result in filling up the memory space allocated to the function executing and this would result in memory corruption. To test the theory, one can modify the demo application provided by the Cypress WICED SDK and introduce an incorrect "memcpy" operation and use the compiled application on the evaluation board provided by Cypress semiconductors with exactly the same Wi -Fi SOC. The results were identical where the device would completely stop responding to any of the ping or web requests. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-11579 | | In the most recent firmware for Blipcare, the device provides an open Wireless network called "Blip" for communicating with the device. The user connects to this open Wireless network and uses the web management interface of the device to provide the user's Wi-Fi credentials so that the device can connect to it and have Internet access. This device acts as a Wireless Blood pressure monitor and is used to measure blood pressure levels of a person. This allows an attacker who is in vicinity of Wireless signal generated by the Blipcare device to easily sniff the credentials. Also, an attacker can connect to the open wireless network "Blip" exposed by the device and modify the HTTP response presented to the user by the device to execute other attacks such as convincing the user to download and execute a malicious binary that would infect a user's computer or mobile device with malware. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-11578 | | It was discovered as a part of the research on IoT devices in the most recent firmware for Blipcare device that the device allows to connect to web management interface on a non-SSL connection using plain text HTTP protocol. The user uses the web management interface of the device to provide the user's Wi-Fi credentials so that the device can connect to it and have Internet access. This device acts as a Wireless Blood pressure monitor and is used to measure blood pressure levels of a person. This allows an attacker who is connected to the Blipcare's device wireless network to easily sniff these values using a MITM attack. Published at: July 03, 2019 at 12:15AM View on website July 03, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2018-11427 | | CSRF tokens are not used in the web application of Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior, which makes it possible to perform CSRF attacks on the device administrator. Published at: July 03, 2019 at 06:15PM View on website July 03, 2019 at 08:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2018-11426 | | A weak Cookie parameter is used in the web application of Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior. An attacker can brute force parameters required to bypass authentication and access the web interface to use all its functions except for password change. Published at: July 03, 2019 at 06:15PM View on website July 03, 2019 at 08:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-9327 | | |
New vulnerabilities from the NVD: CVE-2017-9326 | | The keystore password for the Spark History Server may be exposed in unsecured files under the /var/run/cloudera-scm-agent directory managed by Cloudera Manager. The keystore file itself is not exposed. Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-9325 | | The provided secure solrconfig.xml sample configuration does not enforce Sentry authorization on /update/json/docs. Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-6900 | | An issue was discovered in Riello NetMan 204 14-2 and 15-2. The issue is with the login script and wrongpass Python script used for authentication. When calling wrongpass, the variables $VAL0 and $VAL1 should be enclosed in quotes to prevent the potential for Bash command injection. Further to this, VAL0 and VAL1 should be sanitised to ensure they do not contain malicious characters. Passing it the username of '-' will cause it to time out and log the user in because of poor error handling. This will log the attacker in as an administrator where the telnet / ssh services can be enabled, and the credentials for local users can be reset. Also, login.cgi accepts the username as a GET parameter, so login can be achieved by browsing to the /cgi-bin/login.cgi?username=-%20a URI. Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-6216 | | novaksolutions/infusionsoft-php-sdk v2016-10-31 is vulnerable to a reflected XSS in the leadscoring.php resulting code execution Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-18346 | | SQL injection vulnerability in /wbg/core/_includes/authorization.inc.php in CMS Web-Gooroo through 2013-01-19 allows remote attackers to execute arbitrary SQL commands via the wbg_login parameter. Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-17972 | | packages/subjects/pub/subjects.php in Archon 3.21 rev-1 has XSS in the referer parameter in an index.php?subjecttypeid=xxx request, aka Open Bug Bounty ID OBB-466362. Published at: July 03, 2019 at 08:15PM View on website July 03, 2019 at 10:18PM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8230 | | On Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices, the users on the device are divided into 2 groups "admin" and "user". However, as a part of security analysis it was identified that a low privileged user who belongs to the "user" group and who has access to login in to the web administrative interface of the device can add a new administrative user to the interface using HTTP APIs provided by the device and perform all the actions as an administrative user by using that account. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable functions that performs the various action described in HTTP APIs. If one opens this binary in IDA-pro one will notice that this follows a ARM little endian format. The function at address 0x00429084 in IDA pro is the one that processes the HTTP API request for "addUser" action. If one traces the calls to this function, it can be clearly seen that the function sub_ 41F38C at address 0x0041F588 parses the call received from the browser and passes it to the "addUser" function without any authorization check. Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8229 | | Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices allow an unauthenticated attacker to download the administrative credentials. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that sets up the default credentials on the device. If one opens this binary in IDA-pro one will notice that this follows a ARM little endian format. The function sub_436D6 in IDA pro is identified to be setting up the configuration for the device. If one scrolls to the address 0x000437C2 then one can see that /current_config is being set as an ALIAS for /mnt/mtd/Config folder on the device. If one TELNETs into the device and navigates to /mnt/mtd/Config folder, one can observe that it contains various files such as Account1, Account2, SHAACcount1, etc. This means that if one navigates to http://[IPofcamera]/current_config/Sha1Account1 then one should be able to view the content of the files. The security researchers assumed that this was only possible only after authentication to the device. However, when unauthenticated access tests were performed for the same URL as provided above, it was observed that the device file could be downloaded without any authentication. Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8228 | | Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices mishandle reboots within the past two hours. Amcrest cloud services does not perform a thorough verification when allowing the user to add a new camera to the user's account to ensure that the user actually owns the camera other than knowing the serial number of the camera. This can allow an attacker who knows the serial number to easily add another user's camera to an attacker's cloud account and control it completely. This is possible in case of any camera that is currently not a part of an Amcrest cloud account or has been removed from the user's cloud account. Also, another requirement for a successful attack is that the user should have rebooted the camera in the last two hours. However, both of these conditions are very likely for new cameras that are sold over the Internet at many ecommerce websites or vendors that sell the Amcrest products. The successful attack results in an attacker being able to completel y control the camera which includes being able to view and listen on what the camera can see, being able to change the motion detection settings and also be able to turn the camera off without the user being aware of it. Note: The same attack can be executed using the Amcrest Cloud mobile application. Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8227 | | Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 incorrect password attempts are detected using the Web and HTTP API interface provided by the device. However, if the same brute force attempt is performed using the ONVIF specification (which is supported by the same binary) then there is no account lockout or timeout executed. This can allow an attacker to circumvent the account protection mechanism and brute force the credentials. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that performs the credential check in the binary for the ONVIF specification. If one opens this binary in IDA-pro one will notice that this follows a ARM little endian format. The function at address 00671618 in IDA pro is parses the WSSE security token header. The sub_ 603D8 then performs the authentication check and if it is incorrect passes to the function sub_59F4C which prints the value "Sender not authorized." Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-8226 | | Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware and can be extracted by anyone who reverses the firmware to identify them. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that sets up the default credentials on the device. If one opens this binary in IDA-pro, one will notice that this follows a ARM little endian format. The function sub_3DB2FC in IDA pro is identified to be setting up the values at address 0x003DB5A6. The sub_5C057C then sets this value and adds it to the Configuration files in /mnt/mtd/Config/Account1 file. Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2017-13719 | | The Amcrest IPM-721S Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 allows HTTP requests that permit enabling various functionalities of the camera by using HTTP APIs, instead of the web management interface that is provided by the application. This HTTP API receives the credentials as base64 encoded in the Authorization HTTP header. However, a missing length check in the code allows an attacker to send a string of 1024 characters in the password field, and allows an attacker to exploit a memory corruption issue. This can allow an attacker to circumvent the account protection mechanism and brute force the credentials. If the firmware version Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 is dissected using the binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that has many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that performs the credent ial check in the binary for the HTTP API specification. If we open this binary in IDA Pro we will notice that this follows an ARM little-endian format. The function at address 00415364 in IDA Pro starts the HTTP authentication process. This function calls another function at sub_ 0042CCA0 at address 0041549C. This function performs a strchr operation after base64 decoding the credentials, and stores the result on the stack, which results in a stack-based buffer overflow. Published at: July 03, 2019 at 11:15PM View on website July 04, 2019 at 02:18AM via National Vulnerability Database |
New vulnerabilities from the NVD: CVE-2015-3907 | | |
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