CVE-2011-4885 Denial of service in n/a
Remote attackers can cause CPU exhaustion and denial of service by sending crafted form parameters that trigger predictable hash collisions in PHP.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-4885?
CVE-2011-4885 is a medium-severity denial of service vulnerability in Php Php, published on 30 Dec 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
Weakness: CWE-20
Which versions are affected by CVE-2011-4885?
It affects 1 product.
Products include Php Php.
How do I fix CVE-2011-4885?
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-2011-4885 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-4885 exists.
Public exploit code: 1 Metasploit module and 3 Exploit-DB entries.
Other vulnerabilities in Php Php
Sources
Also known as GHSA-q9pr-6h9m-h8vf.