oss-security - Re: CVE request: kernel: flat: fix uninitialized ptr with shared libs

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Date: Tue, 18 Aug 2009 14:37:20 -0400 (EDT)
From: "Steven M. Christey" <coley@...us.mitre.org>
To: "Steven M. Christey" <coley@...us.mitre.org>
cc: oss-security@...ts.openwall.com
Subject: Re: CVE request: kernel: flat: fix uninitialized ptr
 with shared libs


On Tue, 18 Aug 2009, Steven M. Christey wrote:

> Use CVE-2009-2845, to be filled in soon.

Actually, that's a duplicate (yikes).  I'll reject that one.

CVE-2009-2768 was already assigned, use it instead.  See below.

- Steve


======================================================
Name: CVE-2009-2768
Status: Candidate
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2768
Reference: MLIST:[linux-kernel] 20090622 Fix for shared flat binary format in 2.6.30
Reference: URL:http://lkml.org/lkml/2009/6/22/91
Reference: MLIST:[oss-security] 20090813 CVE request: kernel: flat: fix uninitialized ptr with shared libs
Reference: URL:http://www.openwall.com/lists/oss-security/2009/08/13/1
Reference: CONFIRM:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3440625d78711bee41a84cf29c3d8c579b522666
Reference: CONFIRM:http://thread.gmane.org/gmane.linux.hardware.blackfin.kernel.devel/1905
Reference: CONFIRM:http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc6
Reference: BID:36037
Reference: URL:http://www.securityfocus.com/bid/36037

The load_flat_shared_library function in fs/binfmt_flat.c in the flat
subsystem in the Linux kernel before 2.6.31-rc6 allows local users to
cause a denial of service (NULL pointer dereference and system crash)
or possibly have unspecified other impact by executing a shared flat
binary, which triggers an access of an "uninitialized cred pointer."

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.