Bug 246359 (CVE-2008-5029)

Summary:	Kernel: __scm_destroy in net/core/scm.c DOS (CVE-2008-5029)
Product:	Gentoo Security	Reporter:	Stefan Behte (RETIRED) <craig>
Component:	Kernel	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	minor	CC:	kernel, kuba
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5029
Whiteboard:	[linux <2.6.25.20] [linux >=2.6.26 <2.6.26.8] [linux >=2.6.27 <2.6.27.5]
Package list:		Runtime testing required:	---

Description Stefan Behte (RETIRED) gentoo-dev

2008-11-11 00:25:38 UTC

CVE-2008-5029 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-5029):
  The __scm_destroy function in net/core/scm.c in the Linux kernel
  2.6.27.4, 2.6.26, and earlier makes indirect recursive calls to
  itself through calls to the fput function, which allows local users
  to cause a denial of service (panic) via vectors related to sending
  an SCM_RIGHTS message through a UNIX domain socket and closing file
  descriptors.

Comment 1 Robert Buchholz (RETIRED) gentoo-dev

2008-12-17 16:51:14 UTC

*** Bug 250399 has been marked as a duplicate of this bug. ***

Comment 2 kfm 2009-07-21 03:34:17 UTC

Populated Status Whiteboard. Here's the upstream patch:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f8d570a4

Should this patch be applied independently, it is also strongly recommended to apply this related patch:

"scm: fix scm_fp_list->list initialization made in wrong place"
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5421ae0153b4ba0469967cfd8de96144e3bf3979

hardened-kernel unaffected at present time. Removing alias.

PS: genpatches-2.6.26-4 added 2.6.26.8. genpatches-2.6.27-5 added 2.6.27.5. =genpatches-2.6.25* remains vulnerable. However, hardened-sources-2.6.25-r13 does not because we independently folded in the newest stable patches.