The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the container; (2) create arbitrary nodes (mknod) via the virDomainDeviceAttach API and a symlink attack on /dev in the container; and cause a denial of service (shutdown or reboot host OS) via the (3) virDomainShutdown or (4) virDomainReboot API and a symlink attack on /dev/initctl in the container, related to "paths under /proc/$PID/root" and the virInitctlSetRunLevel function.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Link | Tags |
|---|---|
| http://libvirt.org/news.html | |
| http://secunia.com/advisories/56187 | third party advisory vendor advisory |
| http://secunia.com/advisories/60895 | third party advisory |
| http://security.gentoo.org/glsa/glsa-201412-04.xml | vendor advisory |
| http://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=5fc590ad9f4 | |
| http://lists.opensuse.org/opensuse-updates/2014-05/msg00004.html | vendor advisory |
| http://security.libvirt.org/2013/0018.html | vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1045643 | |
| http://lists.fedoraproject.org/pipermail/package-announce/2014-February/129199.html | vendor advisory |
| http://www.securityfocus.com/bid/65743 | vdb entry |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732394 | |
| http://secunia.com/advisories/56215 | third party advisory vendor advisory |