CVE-2011-3263 Denial of service in n/a
Attackers can cause CPU exhaustion and denial of service in Zabbix agents by requesting checksums of special devices like /dev/urandom.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-3263?
CVE-2011-3263 is a medium-severity denial of service vulnerability in Zabbix Zabbix, published on 19 Aug 2011. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
zabbix_agentd in Zabbix before 1.8.6 and 1.9.x before 1.9.4 allows context-dependent attackers to cause a denial of service (CPU consumption) by executing the vfs.file.cksum command for a special device, as demonstrated by the /dev/urandom device.
Weakness: CWE-399
Which versions are affected by CVE-2011-3263?
It affects 1 product.
Products include Zabbix Zabbix.
How do I fix CVE-2011-3263?
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-2011-3263 being exploited?
There is no known exploitation of CVE-2011-3263 in the wild and no public exploit code.
Other vulnerabilities in Zabbix Zabbix
Sources
Also known as DEBIAN-CVE-2011-3263, GHSA-39vx-jv7h-w8ch.