CVE-2011-4957 Denial of service in n/a
Remote attackers can crash WordPress by submitting comments with crafted URLs that trigger excessive recursive calls in the URL formatting function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-4957?
CVE-2011-4957 is a medium-severity denial of service vulnerability in Wordpress Wordpress, published on 27 Jun 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.
Weakness: CWE-20
Which versions are affected by CVE-2011-4957?
It affects 1 product.
Products include Wordpress Wordpress.
How do I fix CVE-2011-4957?
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-2011-4957 being exploited?
There is no known exploitation of CVE-2011-4957 in the wild and no public exploit code.
Other vulnerabilities in Wordpress Wordpress
Sources
Also known as DEBIAN-CVE-2011-4957, GHSA-mf9x-p929-vr83.