CVE-2016-2851
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 24.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 24.28% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 10 March 2016
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- debian/debian linux · opensuse/leap · opensuse/opensuse · cypherpunks/libotr
- Source
- cve@mitre.org
EPSS moved from 20.9% on 21 September 2026 to 24.3% on 4 November 2026, peaking at 25.4% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.htmlMailing List
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.htmlVendor Advisory
- http://seclists.org/fulldisclosure/2016/Mar/21Exploit, Mailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3512Third Party Advisory
- http://www.securityfocus.com/archive/1/537745/100/0/threadedThird Party Advisory
- http://www.securityfocus.com/bid/84285Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2926-1Third Party Advisory
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.htmlExploit
- https://security.gentoo.org/glsa/201701-10Third 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.htmlMailing List
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.htmlVendor Advisory
- http://seclists.org/fulldisclosure/2016/Mar/21Exploit, Mailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3512Third Party Advisory
- http://www.securityfocus.com/archive/1/537745/100/0/threadedThird Party Advisory
- http://www.securityfocus.com/bid/84285Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2926-1Third Party Advisory
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.htmlExploit
- https://security.gentoo.org/glsa/201701-10Third 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.