1. Home
  2. Vulnerabilities
  3. CVE-2016-2851
9.8
CRITICAL CVSS 3.0
CVE-2016-2851
LibOTR Buffer Overflow
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.

INFO

Published Date :

April 7, 2016, 11:59 p.m.

Last Modified :

April 12, 2025, 10:46 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-2851 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Opensuse leap
2 Opensuse opensuse
1 Debian debian_linux
1 Cypherpunks libotr
: Total Affected Vendor : 3 | Products : 4
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.0 CRITICAL [email protected]
Solution
This addresses a buffer overflow vulnerability in the libotr library that could lead to denial of service or arbitrary code execution.
  • Update the affected libotr and libotr2 packages.
  • For Debian systems, upgrade to libotr version 3.2.1-1+deb7u2 or 4.1.0-2+deb8u1 or later.
  • For SUSE systems, apply the appropriate patch using YaST online_update or zypper.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-2851.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html Mailing List
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html Vendor Advisory
http://seclists.org/fulldisclosure/2016/Mar/21 Exploit Mailing List Third Party Advisory
http://www.debian.org/security/2016/dsa-3512 Third Party Advisory
http://www.securityfocus.com/archive/1/537745/100/0/threaded Third Party Advisory
http://www.securityfocus.com/bid/84285 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2926-1 Third Party Advisory
https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html Exploit
https://security.gentoo.org/glsa/201701-10 Third Party Advisory
https://www.exploit-db.com/exploits/39550/ Third Party Advisory VDB Entry
https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/ Exploit
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html Mailing List
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html Vendor Advisory
http://seclists.org/fulldisclosure/2016/Mar/21 Exploit Mailing List Third Party Advisory
http://www.debian.org/security/2016/dsa-3512 Third Party Advisory
http://www.securityfocus.com/archive/1/537745/100/0/threaded Third Party Advisory
http://www.securityfocus.com/bid/84285 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2926-1 Third Party Advisory
https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html Exploit
https://security.gentoo.org/glsa/201701-10 Third Party Advisory
https://www.exploit-db.com/exploits/39550/ Third Party Advisory VDB Entry
https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/ Exploit
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-2851 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-2851 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-2851 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-2851 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html
    Added Reference http://seclists.org/fulldisclosure/2016/Mar/21
    Added Reference http://www.debian.org/security/2016/dsa-3512
    Added Reference http://www.securityfocus.com/archive/1/537745/100/0/threaded
    Added Reference http://www.securityfocus.com/bid/84285
    Added Reference http://www.ubuntu.com/usn/USN-2926-1
    Added Reference https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html
    Added Reference https://security.gentoo.org/glsa/201701-10
    Added Reference https://www.exploit-db.com/exploits/39550/
    Added Reference https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Oct. 17, 2018

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/201701-10 No Types Assigned https://security.gentoo.org/glsa/201701-10 Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html Mailing List
    Changed Reference Type http://www.securityfocus.com/archive/1/537745/100/0/threaded No Types Assigned http://www.securityfocus.com/archive/1/537745/100/0/threaded Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html Vendor Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2016/Mar/21 Exploit http://seclists.org/fulldisclosure/2016/Mar/21 Exploit, Mailing List, Third Party Advisory
    Changed Reference Type http://www.ubuntu.com/usn/USN-2926-1 No Types Assigned http://www.ubuntu.com/usn/USN-2926-1 Third Party Advisory
    Changed Reference Type https://www.exploit-db.com/exploits/39550/ No Types Assigned https://www.exploit-db.com/exploits/39550/ Third Party Advisory, VDB Entry
    Changed Reference Type http://www.securityfocus.com/bid/84285 No Types Assigned http://www.securityfocus.com/bid/84285 Third Party Advisory, VDB Entry
    Changed Reference Type http://www.debian.org/security/2016/dsa-3512 No Types Assigned http://www.debian.org/security/2016/dsa-3512 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:novell:leap:42.1:*:*:*:*:*:*:* *cpe:2.3:o:novell:opensuse:13.2:*:*:*:*:*:*:* OR *cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 09, 2018

    Action Type Old Value New Value
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/537745/100/0/threaded [Exploit]
    Added Reference http://www.securityfocus.com/archive/1/537745/100/0/threaded [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 08, 2017

    Action Type Old Value New Value
    Added Reference https://www.exploit-db.com/exploits/39550/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 01, 2017

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201701-10 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 03, 2016

    Action Type Old Value New Value
    Added Reference http://www.ubuntu.com/usn/USN-2926-1 [No Types Assigned]
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 28, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/84285 [No Types Assigned]
  • Modified Analysis by [email protected]

    Apr. 11, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Configuration 2 OR *cpe:2.3:o:novell:leap:42.1:*:*:*:*:*:*:* *cpe:2.3:o:novell:opensuse:13.2:*:*:*:*:*:*:* Configuration 3 OR *cpe:2.3:a:cypherpunks:libotr:4.1.0:*:*:*:*:*:*:* (and previous)
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/ No Types Assigned https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/ Exploit
    Changed Reference Type https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html No Types Assigned https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html Exploit
    Changed Reference Type http://www.securityfocus.com/archive/1/archive/1/537745/100/0/threaded No Types Assigned http://www.securityfocus.com/archive/1/archive/1/537745/100/0/threaded Exploit
    Changed Reference Type http://seclists.org/fulldisclosure/2016/Mar/21 No Types Assigned http://seclists.org/fulldisclosure/2016/Mar/21 Exploit
    Added CWE CWE-119
  • Initial Analysis by [email protected]

    Apr. 08, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 7.5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

23.06 }} 4.29%

score

0.95652

percentile