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Vulnerability record · CVE-2016-2851 · published 7 April 2016

CVE-2016-2851: Debian linux memory buffer overflow vulnerability

Debian · Debian Linux

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.

9.8 CVSS 3.0 Critical EPSS 25% · top 2.1% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
22References, 6 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 ExploitMailing ListThird 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 AdvisoryVDB 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 AdvisoryVDB 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 ExploitMailing ListThird 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 AdvisoryVDB 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 AdvisoryVDB Entry
https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/ Exploit

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Source: NIST National Vulnerability Database (record CVE-2016-2851), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.