Vulnerabilities > CVE-2016-2380 - Information Exposure vulnerability in multiple products
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Subverting Environment Variable Values The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
- Footprinting An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Browser Fingerprinting An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3620.NASL description Yves Younan of Cisco Talos discovered several vulnerabilities in the MXit protocol support in pidgin, a multi-protocol instant messaging client. A remote attacker can take advantage of these flaws to cause a denial of service (application crash), overwrite files, information disclosure, or potentially to execute arbitrary code. last seen 2020-06-01 modified 2020-06-02 plugin id 92328 published 2016-07-18 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92328 title Debian DSA-3620-1 : pidgin - security update NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2387.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365) - A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366 ) - Multiple memory corruption vulnerabilities exist in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could result in multiple buffer overflows, potentially resulting in code execution or memory disclosure.(CVE-2016-2368) - A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369) - An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373) - An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374) - An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380) - A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-12-10 plugin id 131879 published 2019-12-10 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131879 title EulerOS 2.0 SP2 : pidgin (EulerOS-SA-2019-2387) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201701-38.NASL description The remote host is affected by the vulnerability described in GLSA-201701-38 (Pidgin: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Pidgin. Please review the CVE identifiers referenced below for details. Impact : A remote attacker might send specially crafted data using the MXit protocol, possibly resulting in the remote execution of arbitrary code with the privileges of the process, a Denial of Service condition, or in leaking confidential information. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 96542 published 2017-01-17 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96542 title GLSA-201701-38 : Pidgin: Multiple vulnerabilities NASL family Windows NASL id PIDGIN_2_11_0.NASL description The version of Pidgin installed on the remote Windows host is prior to 2.11.0. It is, therefore, affected by multiple vulnerabilities : - A NULL pointer dereference flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data, to cause a denial of service. (CVE-2016-2365) - Multiple out-of-bounds read errors exist when handling the MXIT protocol. A remote attacker can exploit these, via crafted MXIT data, to cause a denial of service. (CVE-2016-2366, CVE-2016-2370) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via an invalid size for an avatar, to disclose memory contents or cause a denial of service. (CVE-2016-2367) - Multiple memory corruption issues exist when handling the MXIT protocol. A remote attacker can exploit these, via crafted MXIT data, to disclose memory contents or execute arbitrary code. (CVE-2016-2368) - A NULL pointer dereference flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT packet starting with a NULL byte, to cause a denial of service. (CVE-2016-2369) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data, to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-2371) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via an invalid size for a file transfer, to disclose memory contents or cause a denial of service. (CVE-2016-2372) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, by sending an invalid mood, to cause a denial of service. (CVE-2016-2373) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT MultiMX messages, to disclose memory contents or execute arbitrary code. (CVE-2016-2374) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT contact information, to disclose memory contents. (CVE-2016-2375) - A buffer overflow condition exists when handling the MXIT protocol. A remote attacker can exploit this, via a crafted packet having an invalid size, to execute arbitrary code. (CVE-2016-2376) - An out-of-bounds write error exists when handling the MXIT protocol. A remote attacker can exploit this, via a negative content-length response to an HTTP request, to cause a denial of service. (CVE-2016-2377) - A buffer overflow condition exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted data using negative length values, to cause a denial of service. (CVE-2016-2378) - A flaw exists in MXIT due to using weak cryptography when encrypting a user password. A man-in-the-middle attacker able to access login messages can exploit this to impersonate the user. (CVE-2016-2379) - An out-of-bounds read error exists when handling the MXIT protocol. A remote attacker can exploit this, via a crafted local message, to disclose memory contents. (CVE-2016-2380) - A directory traversal flaw exists when handling the MXIT protocol. A remote attacker can exploit this, via crafted MXIT data using an invalid file name for a splash image, to overwrite files. (CVE-2016-4323) - An unspecified vulnerability exists due to X.509 certificates not being properly imported when using GnuTLS. No other details are available. last seen 2020-06-01 modified 2020-06-02 plugin id 91784 published 2016-06-23 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91784 title Pidgin < 2.11.0 Multiple Vulnerabilities NASL family Debian Local Security Checks NASL id DEBIAN_DLA-542.NASL description Numerous security issues have been identified and fixed in Pidgin in Debian/Wheezy. CVE-2016-2365 MXIT Markup Command Denial of Service Vulnerability CVE-2016-2366 MXIT Table Command Denial of Service Vulnerability CVE-2016-2367 MXIT Avatar Length Memory Disclosure Vulnerability CVE-2016-2368 MXIT g_snprintf Multiple Buffer Overflow Vulnerabilities CVE-2016-2369 MXIT CP_SOCK_REC_TERM Denial of Service Vulnerability CVE-2016-2370 MXIT Custom Resource Denial of Service Vulnerability CVE-2016-2371 MXIT Extended Profiles Code Execution Vulnerability CVE-2016-2372 MXIT File Transfer Length Memory Disclosure Vulnerability CVE-2016-2373 MXIT Contact Mood Denial of Service Vulnerability CVE-2016-2374 MXIT MultiMX Message Code Execution Vulnerability CVE-2016-2375 MXIT Suggested Contacts Memory Disclosure Vulnerability CVE-2016-2376 MXIT read stage 0x3 Code Execution Vulnerability CVE-2016-2377 MXIT HTTP Content-Length Buffer Overflow Vulnerability CVE-2016-2378 MXIT get_utf8_string Code Execution Vulnerability CVE-2016-2380 MXIT mxit_convert_markup_tx Information Leak Vulnerability CVE-2016-4323 MXIT Splash Image Arbitrary File Overwrite Vulnerability For Debian 7 last seen 2020-03-17 modified 2016-07-05 plugin id 91922 published 2016-07-05 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91922 title Debian DLA-542-1 : pidgin security update NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3031-1.NASL description Yves Younan discovered that Pidgin contained multiple issues in the MXit protocol support. A remote attacker could use this issue to cause Pidgin to crash, resulting in a denial of service, or possibly execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 92033 published 2016-07-13 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92033 title Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : pidgin vulnerabilities (USN-3031-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2222.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously.Security Fix(es):A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378)A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376)An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375)An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374)A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373)An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371)A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle attacker can send an invalid size for a file transfer which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the file is sent to another user.(CVE-2016-2372)A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365)A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366)An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-11-08 plugin id 130684 published 2019-11-08 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130684 title EulerOS 2.0 SP5 : pidgin (EulerOS-SA-2019-2222) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2650.NASL description According to the versions of the pidgin package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent by the server could potentially result in an out-of-bounds write of one byte. A malicious server can send a negative content-length in response to a HTTP request triggering the vulnerability.(CVE-2016-2377) - A buffer overflow vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in arbitrary code execution. A malicious server or an attacker who intercepts the network traffic can send an invalid size for a packet which will trigger a buffer overflow.(CVE-2016-2376) - A buffer overflow vulnerability exists in the handling of the MXIT protocol Pidgin. Specially crafted data sent via the server could potentially result in a buffer overflow, potentially resulting in memory corruption. A malicious server or an unfiltered malicious user can send negative length values to trigger this vulnerability.(CVE-2016-2378) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an out-of-bounds read. A malicious server or man-in-the-middle attacker can send invalid data to trigger this vulnerability.(CVE-2016-2370) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a null pointer dereference. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2365) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or an attacker who intercepts the network traffic can send invalid data to trigger this vulnerability and cause a crash.(CVE-2016-2366) - A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious server or user can send an invalid mood to trigger this vulnerability.(CVE-2016-2373) - A directory traversal exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent from the server could potentially result in an overwrite of files. A malicious server or someone with access to the network traffic can provide an invalid filename for a splash image triggering the vulnerability.(CVE-2016-4323) - A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability.(CVE-2016-2369) - An exploitable memory corruption vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT MultiMX message sent via the server can result in an out-of-bounds write leading to memory disclosure and code execution.(CVE-2016-2374) - An exploitable out-of-bounds read exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT contact information sent from the server can result in memory disclosure.(CVE-2016-2375) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out-of-bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read.(CVE-2016-2380) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle attacker can send an invalid size for a file transfer which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the file is sent to another user.(CVE-2016-2372) - An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in an out-of-bounds read. A malicious user, server, or man-in-the-middle can send an invalid size for an avatar which will trigger an out-of-bounds read vulnerability. This could result in a denial of service or copy data from memory to the file, resulting in an information leak if the avatar is sent to another user.(CVE-2016-2367) - An out-of-bounds write vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could cause memory corruption resulting in code execution.(CVE-2016-2371) - Multiple memory corruption vulnerabilities exist in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could result in multiple buffer overflows, potentially resulting in code execution or memory disclosure.(CVE-2016-2368) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-08 modified 2019-12-18 plugin id 132185 published 2019-12-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132185 title EulerOS 2.0 SP3 : pidgin (EulerOS-SA-2019-2650)
Seebug
| bulletinFamily | exploit |
| description | ### DESCRIPTION An information leak exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent to the server could potentially result in an out of bounds read. A user could be convinced to enter a particular string which would then get converted incorrectly and could lead to a potential out-of-bounds read. ### CVSSv3 SCORE 3.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N ### TESTED VERSIONS Pidgin 2.10.11 ### PRODUCT URLs https://www.pidgin.im/ ### DETAILS When a message is sent by Pidgin to the server, it has to convert the markup from libpurple (HTML-based) markup to MXIT markup. To do this, the function mxitconvertmarkup_tx defined in the file markup.c will be called. This function will copy the data from the old string message to the new string mx, converting it along the way. However, at lines 1146-1154 it will convert the markup to change the font color without checking the length of the string that is remaining: ``` 1146 else if ( purple_str_has_prefix( &message[i], "<font color=" ) ) { /* font colour */ tag = g_new0( struct tag, 1 ); tag->type = MXIT_TAG_COLOR; tagstack = g_list_append( tagstack, tag ); memset( color, 0x00, sizeof( color ) ); memcpy( color, &message[i + 13], 7 ); g_string_append( mx, color ); 1154 } ``` It will compare if the string starts with <font color= at the current position in the message at line 1146. If it does it will copy 7 bytes from 1 element past the end of `=`, presumably to skip over the `#` tag. However, if `<font color=` is at the end of the string then this will result in an out-of-bounds read of message. Since one byte after the end of the `=` will be skipped over, the NULL termination string will be skipped over, allowing the 7 bytes of data behind the string to be copied to the mx, which is the string that will be sent to the server. ### TIMELINE * 2016-04-13 - Vendor Notification * 2016-06-21 - Public Disclosure |
| id | SSV:96742 |
| last seen | 2017-11-19 |
| modified | 2017-10-19 |
| published | 2017-10-19 |
| reporter | Root |
| title | Pidgin MXIT mxit_convert_markup_tx Information Leak Vulnerability(CVE-2016-2380) |
Talos
| id | TALOS-2016-0123 |
| last seen | 2019-05-29 |
| published | 2016-06-21 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0123 |
| title | Pidgin MXIT mxit_convert_markup_tx Information Leak Vulnerability |