CVE-2008-3275

Published: 12 August 2008

The (1) real_lookup and (2) __lookup_hash functions in fs/namei.c in the vfs implementation in the Linux kernel before 2.6.25.15 do not prevent creation of a child dentry for a deleted (aka S_DEAD) directory, which allows local users to cause a denial of service ("overflow" of the UBIFS orphan area) via a series of attempted file creations within deleted directories.

From the Ubuntu security team

Zoltan Sogor discovered that new directory entries could be added to already deleted directories. A local attacker could exploit this, filling up available memory and disk space, leading to a denial of service.

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.27~rc1)
Patches:
Upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d70b67c8bc72ee23b55381bd6a884f4796692f77
linux-source-2.6.15
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.27~rc1)
linux-source-2.6.20
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.27~rc1)
linux-source-2.6.22
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.27~rc1)