CVE-2016-8860
Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.93%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.93% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- torproject/tor
- Source
- cve@mitre.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://openwall.com/lists/oss-security/2016/10/19/11Third Party Advisory
- http://www.debian.org/security/2016/dsa-3694
- http://www.securityfocus.com/bid/95116
- https://blog.torproject.org/blog/tor-0289-released-important-fixesRelease Notes, Vendor Advisory
- https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57cePatch, Vendor Advisory
- https://security.gentoo.org/glsa/201612-45
- https://trac.torproject.org/projects/tor/ticket/20384Vendor Advisory
- http://openwall.com/lists/oss-security/2016/10/19/11Third Party Advisory
- http://www.debian.org/security/2016/dsa-3694
- http://www.securityfocus.com/bid/95116
- https://blog.torproject.org/blog/tor-0289-released-important-fixesRelease Notes, Vendor Advisory
- https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57cePatch, Vendor Advisory
- https://security.gentoo.org/glsa/201612-45
- https://trac.torproject.org/projects/tor/ticket/20384Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.