CVE-2012-3518 Denial of service in n/a
Remote attackers can crash the Tor daemon via crafted vote or consensus documents due to improper handling of invalid flavor names.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-3518?
CVE-2012-3518 is a medium-severity denial of service vulnerability in Tor Tor, published on 26 Aug 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document.
Weakness: CWE-119
Which versions are affected by CVE-2012-3518?
It affects 1 product.
Products include Tor Tor.
How do I fix CVE-2012-3518?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2012-3518 being exploited?
There is no known exploitation of CVE-2012-3518 in the wild and no public exploit code.
Other vulnerabilities in Tor Tor
- CVE-2010-1676 Memory corruption in n/a
- CVE-2009-0939 Tor before 0.2.0.34 treats incomplete IPv4 addresses as valid, which has unknown impact and attack vectors related to "Spec conformance," as
- CVE-2009-0414 Memory corruption in n/a
- CVE-2008-5398 Information disclosure in n/a
- CVE-2011-2778 Memory corruption in n/a
Sources
Also known as DEBIAN-CVE-2012-3518, GHSA-qcx3-c5rp-cj34.