CVE-2011-4894 Information disclosure in n/a
Remote attackers can enumerate Tor bridges by observing DirPort connections when the software is configured as a bridge.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-4894?
CVE-2011-4894 is a medium-severity vulnerability in Tor Tor, published on 23 Dec 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.
Weakness: CWE-200
Which versions are affected by CVE-2011-4894?
It affects 1 product.
Products include Tor Tor.
How do I fix CVE-2011-4894?
Upgrade to a fixed version.
Is CVE-2011-4894 being exploited?
There is no known exploitation of CVE-2011-4894 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-2011-4894, GHSA-j87m-97hh-864x.