CVE-2011-4600 Security feature bypass in n/a

Medium 5.9 Published 14 Apr 2016 Updated 7 Aug 2024

Remote attackers can bypass firewall restrictions on bridge networks by exploiting improper rule handling during libvirtd restarts via DNS or DHCP queries.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2011-4600?

CVE-2011-4600 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 14 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

Weakness: CWE-284

Which versions are affected by CVE-2011-4600?

It affects 2 products.

Linux distribution packages (6)

`libvirt` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`
`libvirt-client` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`
`libvirt-debuginfo` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`
`libvirt-devel` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`
`libvirt-lock-sanlock` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`
`libvirt-python` Red Hat:rhel_eus:6.2::server	All versions	`0:0.9.4-23.el6_2.4`

Products include Canonical Ubuntu Linux, Redhat Libvirt.

How do I fix CVE-2011-4600?

Upgrade to a fixed version.

Is CVE-2011-4600 being exploited?

There is no known exploitation of CVE-2011-4600 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2011-4600, GHSA-r2xr-35cg-68vv, RHBA-2012:0013.