CVE-2016-8860: Buffer Overflow
First published: Wed Jan 04 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Tor Project Tor | <=0.2.8.8 | |
| Tor Project Tor | =0.2.9.0-alpha | |
| Tor Project Tor | =0.2.9.1-alpha | |
| Tor Project Tor | =0.2.9.2-alpha | |
| Tor Project Tor | =0.2.9.3-alpha |
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Reference Links
- 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
Frequently Asked Questions
What is the severity of CVE-2016-8860?
CVE-2016-8860 is classified as a denial of service vulnerability.
How do I fix CVE-2016-8860?
To fix CVE-2016-8860, update Tor to version 0.2.9.4-alpha or later.
What versions of Tor are affected by CVE-2016-8860?
CVE-2016-8860 affects all Tor versions before 0.2.8.9 and all 0.2.9.x versions before 0.2.9.4-alpha.
What can attackers do with CVE-2016-8860?
Attackers can exploit CVE-2016-8860 to cause a denial of service, affecting both clients and hidden services.
How can I determine if I'm at risk from CVE-2016-8860?
If you're using an affected version of Tor, you are at risk from CVE-2016-8860.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/author
- agent/references
- agent/severity
- agent/weakness
- agent/last-modified-date
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/torproject
- canonical/tor project tor
- version/tor project tor/0.2.8.8
- version/tor project tor/0.2.9.0-alpha
- version/tor project tor/0.2.9.1-alpha
- version/tor project tor/0.2.9.2-alpha
- version/tor project tor/0.2.9.3-alpha