CVE-2016-8860

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-04 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

torproject Tor: through 0.2.8.8; 0.2.9.0-alpha, 0.2.9.1-alpha, 0.2.9.2-alpha, 0.2.9.3-alpha

References

http://openwall.com/lists/oss-security/2016/10/19/11
http://www.debian.org/security/2016/dsa-3694
http://www.securityfocus.com/bid/95116
https://blog.torproject.org/blog/tor-0289-released-important-fixes
https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce
https://security.gentoo.org/glsa/201612-45
https://trac.torproject.org/projects/tor/ticket/20384
http://openwall.com/lists/oss-security/2016/10/19/11
http://www.debian.org/security/2016/dsa-3694
http://www.securityfocus.com/bid/95116
https://blog.torproject.org/blog/tor-0289-released-important-fixes
https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce

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