CVE-2016-2851

CRITICAL

Debian Linux < 4.1.0 - Memory Corruption

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2016-2851. PoCs published by X41 D-Sec GmbH.

AI-analyzed exploit summary This PoC exploits an integer overflow in libotr leading to a heap overflow, allowing remote code execution or denial of service by sending a large OTR message. The vulnerability is triggered by a 32-bit integer wrap-around during memory allocation, causing out-of-bounds data copy.

Description

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.

Exploits (1)

exploitdb WORKING POC
by X41 D-Sec GmbH · pythondosmultiple
https://www.exploit-db.com/exploits/39550

This PoC exploits an integer overflow in libotr leading to a heap overflow, allowing remote code execution or denial of service by sending a large OTR message. The vulnerability is triggered by a 32-bit integer wrap-around during memory allocation, causing out-of-bounds data copy.

Classification
Working Poc 100%
Attack Type
Rce | Dos
Complexity
Moderate
Reliability
Reliable
Target: libotr 4.1.0 and below
No auth needed
Prerequisites: Network access to target · OTR session established with victim
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (11)

Core 11
Core References
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2926-1
Third Party Advisory mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/537745/100/0/threaded
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2016/dsa-3512
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201701-10
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/39550/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/84285
Exploit, Mailing List, Third Party Advisory mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2016/Mar/21
Vendor Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html

Scores

CVSS v3 9.8
EPSS 0.2126
EPSS Percentile 95.8%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (5)
cypherpunks/libotr < 4.1.0
debian/debian_linux 7.0
debian/debian_linux 8.0
opensuse/leap 42.1
opensuse/opensuse 13.2
Published Apr 07, 2016
Tracked Since Feb 18, 2026