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CVE-2016-2851

Status Candidate

Overview

Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a series of large OTR messages, which triggers a heap-based buffer overflow.

Related Files

Gentoo Linux Security Advisory 201701-10
Posted Jan 2, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201701-10 - Multiple vulnerabilities have been found in libotr and Pidgin OTR, allowing remote attackers to execute arbitrary code. Versions less than 4.1.1 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2015-8833, CVE-2016-2851
SHA-256 | d13bfedbb70f7760cf106edf31ad9f23912553d80d14d052eb493a387df6dacf
Debian Security Advisory 3512-1
Posted Mar 14, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3512-1 - Markus Vervier of X41 D-Sec GmbH discovered an integer overflow vulnerability in libotr, an off-the-record (OTR) messaging library, in the way how the sizes of portions of incoming messages were stored. A remote attacker can exploit this flaw by sending crafted messages to an application that is using libotr to perform denial of service attacks (application crash), or potentially, execute arbitrary code with the privileges of the user running the application.

tags | advisory, remote, denial of service, overflow, arbitrary
systems | linux, debian
advisories | CVE-2016-2851
SHA-256 | 594fab421417edb38ff98ef311a8b0ebff4444c304515883af5077c0246f3a6b
libotr 4.1.0 Memory Corruption
Posted Mar 11, 2016
Authored by Markus Vervier

A remote attacker may crash or execute arbitrary code in libotr by sending large OTR messages. While processing specially crafted messages, attacker controlled data on the heap is written out of bounds. No special user interaction or authorization is necessary in default configurations. libotr versions 4.1.0 and below are affected.

tags | exploit, remote, arbitrary
advisories | CVE-2016-2851
SHA-256 | ea7da15f0bdfd219e45644306a8022ee070808fe6f08855862fdfa8bf03c3509
Ubuntu Security Notice USN-2926-1
Posted Mar 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2926-1 - Markus Vervier discovered that OTR incorrectly handled large incoming messages. A remote attacker could use this issue to cause OTR to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2016-2851
SHA-256 | f67b0217d1992c373207172bb28efa3fdad04ab3e16925e3431e054bc3bc43c1
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