CVE-2011-0490 Denial of service in n/a
Remote attackers can crash the Tor daemon by triggering specific log messages, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-0490?
CVE-2011-0490 is a medium-severity denial of service vulnerability in Tor Tor, published on 19 Jan 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha makes calls to Libevent within Libevent log handlers, which might allow remote attackers to cause a denial of service (daemon crash) via vectors that trigger certain log messages.
Which versions are affected by CVE-2011-0490?
It affects 1 product.
Products include Tor Tor.
How do I fix CVE-2011-0490?
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-2011-0490 being exploited?
There is no known exploitation of CVE-2011-0490 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-2011-0490, GHSA-xwc2-2xh3-v7qg.