PT-2016-5240 · Libotr+2 · Libotr+2

Markus Vervier · Published 2016-03-09 · Updated 2018-10-30 · CVE-2016-2851

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions libotr versions prior to 4.1.1

Description The issue is caused by an integer overflow in the proto.c file of libotr, which can lead to memory corruption and application crash, or potentially allow execution of arbitrary code. This occurs when a series of large OTR messages are sent, triggering a heap-based buffer overflow. The issue is specific to 64-bit platforms.

Recommendations For versions prior to 4.1.1, update to version 4.1.1 or later to resolve the issue. As a temporary workaround, consider restricting the size of OTR messages to prevent the overflow.

Exploit

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

ALT-PU-2016-1202

CVE-2016-2851

DSA-3512-1

MGASA-2016-0117

OPENSUSE-SU-2016_0708-1

OPENSUSE-SU-2016_0732-1

OPENSUSE-SU-2024:10546-1

SUSE-SU-2016:0706-1

SUSE-SU-2016:0707-1

SUSE-SU-2016_0706-1

SUSE-SU-2016_0707-1

USN-2926-1

Affected Products

Alt Linux

Suse

Libotr

References · 29

• 🔥 https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html · Exploit
• 🔥 https://exploit-db.com/exploits/39550 · Exploit
• 🔥 http://seclists.org/fulldisclosure/2016/Mar/21 · Exploit
• 🔥 https://x41-dsec.de/lab/advisories/x41-2016-001-libotr · Exploit
• https://cve.org/CVERecord?id=CVE-2016-2851 · Security Note
• https://osv.dev/vulnerability/CVE-2016-2851 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2016-2851 · Vendor Advisory
• https://security.gentoo.org/glsa/201701-10 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2926-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2016-0117 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-2851 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-2851 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-2851 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html · Vendor Advisory