CVE-2012-5573 Denial of service in n/a
Remote attackers can cause denial of service or bypass flow control in Tor by sending unexpected SENDME cells, affecting network stability and anonymity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-5573?
CVE-2012-5573 is a medium-severity denial of service vulnerability in n/a, published on 1 Jan 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.
Weakness: CWE-399
Which versions are affected by CVE-2012-5573?
It affects 1 product.
Products include Torproject Tor.
How do I fix CVE-2012-5573?
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-2012-5573 being exploited?
There is no known exploitation of CVE-2012-5573 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2012-5573, GHSA-xvc4-r5fw-47j4.