Bug 288014 – Kernel: eCryptfs: Prevent lower dentry from going negative during unlink (CVE-2009-2908)

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Bjoern Tropf (RETIRED) 2009-10-07 07:01:31 UTC]

Cve assigned but not yet released.

[Comment 1 Bjoern Tropf (RETIRED) 2009-10-15 07:56:13 UTC]

CVE-2009-2908 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2908):

The d_delete function in fs/ecryptfs/inode.c in eCryptfs in the Linux kernel 2.6.31 allows local users to cause a denial of service (kernel OOPS) and possibly execute arbitrary code via unspecified vectors that cause a "negative dentry" and trigger a NULL pointer dereference, as demonstrated via a Mutt temporary directory in an eCryptfs mount.

[Comment 2 Alex Legler (RETIRED) 2009-10-20 22:03:22 UTC]

CVE-2009-2908 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2908):
  The d_delete function in fs/ecryptfs/inode.c in eCryptfs in the Linux
  kernel 2.6.31 allows local users to cause a denial of service (kernel
  OOPS) and possibly execute arbitrary code via unspecified vectors
  that cause a "negative dentry" and trigger a NULL pointer
  dereference, as demonstrated via a Mutt temporary directory in an
  eCryptfs mount.