National Cyber-Alert System
Vulnerability Summary for CVE-2008-3833
Original release date:10/03/2008
Last revised:02/21/2009
Source:
US-CERT/NIST
Overview
The generic_file_splice_write function in fs/splice.c in the Linux kernel before 2.6.19 does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by splicing into an inode in order to create an executable file in a setgid directory, a different vulnerability than CVE-2008-4210.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
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
- Official Statement from Red Hat (01/15/2009)
-
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG.
It was addressed in Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2008-0957.html
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=464450
External Source: XF
Name: kernel-genericfilesplice-priv-escalation(45922)
External Source: BID
Name: 31567
External Source: REDHAT
Name: RHSA-2008:0957
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.19/ChangeLog-2.6.19-rc3
External Source: DEBIAN
Name: DSA-1653
External Source: SECUNIA
Name: 32759
External Source: SECUNIA
Name: 32485
External Source: SECUNIA
Name: 32237
External Source: MLIST
Name: [oss-security] 20081003 CVE-2008-3833 kernel: remove SUID when splicing into an inode
External Source: SUSE
Name: SUSE-SR:2008:025
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.19.y.git;a=commit;h=8c34e2d63231d4bf4852bac8521883944d770fe3
