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CVE-2012-3461

Status Candidate

Overview

The (1) otrl_base64_otr_decode function in src/b64.c; (2) otrl_proto_data_read_flags and (3) otrl_proto_accept_data functions in src/proto.c; and (4) decode function in toolkit/parse.c in libotr before 3.2.1 allocates a zero-length buffer when decoding a base64 string, which allows remote attackers to cause a denial of service (application crash) via a message with the value "?OTR:===.", which triggers a heap-based buffer overflow.

Related Files

Gentoo Linux Security Advisory 201309-07
Posted Sep 16, 2013
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201309-7 - A buffer overflow vulnerability in libotr could allow a remote attacker to execute arbitrary code or cause a Denial of Service condition. Versions less than 3.2.1 are affected.

tags | advisory, remote, denial of service, overflow, arbitrary
systems | linux, gentoo
advisories | CVE-2012-3461
SHA-256 | b9f7d64ccd5178355d93a04d585ebd34103534407075dc6870418e5fe5e26682
Mandriva Linux Security Advisory 2013-097
Posted Apr 11, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-097 - Just Ferguson discovered that libotr, an off-the-record messaging library, can be forced to perform zero-length allocations for heap buffers that are used in base64 decoding routines. An attacker can exploit this flaw by sending crafted messages to an application that is using libotr to perform denial of service attacks or potentially execute arbitrary code. The updated packages have been patched to correct this issue.

tags | advisory, denial of service, arbitrary
systems | linux, mandriva
advisories | CVE-2012-3461
SHA-256 | ba44af9f2a93bd9c88d88b13fbd48e0e938b28d608578c8c0e39c4c29d29b7d9
Ubuntu Security Notice USN-1541-1
Posted Aug 17, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1541-1 - Justin Ferguson discovered multiple heap overflows in libotr. A remote attacker could use this to craft a malformed OTR message that could cause a denial of service via application crash or possibly execute arbitrary code.

tags | advisory, remote, denial of service, overflow, arbitrary
systems | linux, ubuntu
advisories | CVE-2012-3461
SHA-256 | 6639415b413329405dd78b3fdeb6c09d08b8b5349b04696101dac765fabf6df4
Mandriva Linux Security Advisory 2012-131
Posted Aug 14, 2012
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2012-131 - Just Ferguson discovered that libotr, an off-the-record messaging library, can be forced to perform zero-length allocations for heap buffers that are used in base64 decoding routines. An attacker can exploit this flaw by sending crafted messages to an application that is using libotr to perform denial of service attacks or potentially execute arbitrary code. The updated packages have been patched to correct this issue.

tags | advisory, denial of service, arbitrary
systems | linux, mandriva
advisories | CVE-2012-3461
SHA-256 | d2dfc5f2426fd1d0773603a84cfba004ef4a99ccaa10eaee9b7fdd6c41ecb855
Debian Security Advisory 2526-1
Posted Aug 13, 2012
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2526-1 - Just Ferguson discovered that libotr, an off-the-record (OTR) messaging library, can be forced to perform zero-length allocations for heap buffers that are used in base64 decoding routines. An attacker can exploit this flaw by sending crafted messages to an application that is using libotr to perform denial of service attacks or potentially execute arbitrary code.

tags | advisory, denial of service, arbitrary
systems | linux, debian
advisories | CVE-2012-3461
SHA-256 | 7c01fb86e171c48aa3e6e49b606b9a1e9e94d6901619b80a625f9b7c0c78d71d
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