National Cyber-Alert System
Vulnerability Summary for CVE-2009-2768
Original release date:08/14/2009
Last revised:09/04/2009
Source:
US-CERT/NIST
Overview
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."
Impact
CVSS Severity (version 2.0):
Impact Subscore:
10.0
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Official Statement from Red Hat (08/18/2009)
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5 or Red Hat Enterprise MRG. Red Hat does not provide support for flat binary support, and additionally this issue only affected kernels version 2.6.29-rc1 and later.
References to Advisories, Solutions, and Tools
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External Source: MLIST
Name: [oss-security] 20090813 CVE request: kernel: flat: fix uninitialized ptr with shared libs
Type: Patch Information
External Source: CONFIRM
Name: http://thread.gmane.org/gmane.linux.hardware.blackfin.kernel.devel/1905
Type: Patch Information
External Source: MLIST
Name: [linux-kernel] 20090622 Fix for shared flat binary format in 2.6.30
Type: Patch Information
External Source: XF
Name: kernel-loadflatsharedlibrary-dos(52909)
External Source: BID
Name: 36037
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc6
Type: Advisory
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5
Type: Advisory
External Source: SECUNIA
Name: 36278
Type: Advisory
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3440625d78711bee41a84cf29c3d8c579b522666
