CVE-2016-2851 EXPLOIT
9.8
CRITICAL · CVSS 3.0 · EPSS 25.4% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 25.4% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2016-04-07 |
| Last modified | 2026-06-17 |
Affected (4)
| Vendor | Product |
|---|---|
| cypherpunks | libotr |
| debian | debian linux |
| opensuse | leap |
| opensuse | opensuse |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | libotr 4.1.0 - Memory Corruption | 2016-03-10 |
References
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html
- http://seclists.org/fulldisclosure/2016/Mar/21
- http://www.debian.org/security/2016/dsa-3512
- http://www.securityfocus.com/archive/1/537745/100/0/threaded
- http://www.securityfocus.com/bid/84285
- http://www.ubuntu.com/usn/USN-2926-1
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html
- https://security.gentoo.org/glsa/201701-10
- https://www.exploit-db.com/exploits/39550/
- https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html
- http://seclists.org/fulldisclosure/2016/Mar/21
- http://www.debian.org/security/2016/dsa-3512
- http://www.securityfocus.com/archive/1/537745/100/0/threaded
- http://www.securityfocus.com/bid/84285
- http://www.ubuntu.com/usn/USN-2926-1
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html
- https://security.gentoo.org/glsa/201701-10
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