Buffer overflow in Torproject Tor
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 attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Torproject Tor — versions 0.2.9.0, 0.2.9.1, 0.2.9.2
Weakness classification (CWE)
References
- blog.torproject.org/blog/tor-0289-released-important-fixes (Release Notes, Vendor Advisory)
- github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce (Patch, Vendor Advisory)
- security.gentoo.org/glsa/201612-45 (vendor-advisory)
- openwall.com/lists/oss-security/2016/10/19/11 (mailing-list, Third Party Advisory)
- trac.torproject.org/projects/tor/ticket/20384 (Vendor Advisory)
- www.securityfocus.com/bid/95116 (vdb-entry)
- www.debian.org/security/2016/dsa-3694 (vendor-advisory)
Frequently asked questions
- What is CVE-2016-8860?
- CVE-2016-8860 is a high-severity vulnerability in Torproject Tor, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-01-04.
- How severe is CVE-2016-8860?
- High severity. CVSS v3 base score is 7.5 out of 10.