CVE-2012-4922 Denial of service in n/a
Remote attackers can cause a denial of service in Tor by sending malformed directory objects, triggering an assertion failure and daemon exit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-4922?
CVE-2012-4922 is a medium-severity denial of service vulnerability in n/a, published on 14 Sep 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The tor_timegm function in common/util.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.22-rc, does not properly validate time values, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a malformed directory object, a different vulnerability than CVE-2012-4419.
Weakness: CWE-20
Which versions are affected by CVE-2012-4922?
It affects 1 product.
Products include Torproject Tor.
How do I fix CVE-2012-4922?
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-2012-4922 being exploited?
There is no known exploitation of CVE-2012-4922 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2012-4922, GHSA-h4mc-jpwx-rjgp.