CVE-2012-3517 Use after free in n/a
Remote attackers can crash the Tor daemon via failed DNS requests due to a use-after-free vulnerability in dns.c.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-3517?
CVE-2012-3517 is a medium-severity use after free 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
Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests.
Weakness: CWE-399
Which versions are affected by CVE-2012-3517?
It affects 1 product.
Products include Tor Tor.
How do I fix CVE-2012-3517?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2012-3517 being exploited?
There is no known exploitation of CVE-2012-3517 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-2012-3517, GHSA-pww9-9prw-24pv.