Bug 234803 - Linux <2.6.27 vfs: fix lookup on deleted directory (CVE-2008-3275)
Bug#: 234803 (CVE-2008-3275) Product:  Gentoo Security Version: unspecified Platform: All
OS/Version: Linux Status: NEW Severity: normal Priority: P2
Resolution:  Assigned To: security@gentoo.org Reported By: rbu@gentoo.org
Component: Kernel
URL:  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d70b67c8bc72ee23b55381bd6a884f4796692f77
Summary: Linux <2.6.27 vfs: fix lookup on deleted directory (CVE-2008-3275)
Keywords:  
Status Whiteboard: [linux <2.6.25.15] [linux >=2.6.26 <2.6.26.2]
Opened: 2008-08-15 10:56 0000
Description:   Opened: 2008-08-15 10:56 0000 
CVE-2008-3275 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-3275):
  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 does 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.

------- Comment #1 From Robert Buchholz 2008-08-15 10:57:53 0000 ------- 
Also fixed in 2.6.25.15 and 2.6.26.2

------- Comment #2 From Kerin Millar 2009-07-20 19:26:23 0000 ------- 
hardened-kernel unaffected at present time. Removing alias.

PS: genpatches-2.6.25-10 included the 2.6.25.15 patch and genpatches-2.6.26-2
included the 2.6.26.2 patch