Vulnerability CVE-2010-4258
Published: 2010-12-30   Modified: 2012-02-13

Description:
The do_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL_DS get_fs value, which allows local users to bypass intended access_ok restrictions, overwrite arbitrary kernel memory locations, and gain privileges by leveraging a (1) BUG, (2) NULL pointer dereference, or (3) page fault, as demonstrated by vectors involving the clear_child_tid feature and the splice system call.

See advisories in our WLB2 database:
Topic
Author
Date
Low
Linux Kernel <= 2.6.37 Local Privilege Escalation
Dan Rosenberg
21.12.2010

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:H/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.2/10
10/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Kernel 

 References:
https://lkml.org/lkml/2010/12/1/543
http://marc.info/?l=linux-kernel&m=129117048916957&w=2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177
https://bugzilla.redhat.com/show_bug.cgi?id=659567
http://www.vupen.com/english/advisories/2011/0375
http://www.vupen.com/english/advisories/2011/0298
http://www.vupen.com/english/advisories/2011/0213
http://www.vupen.com/english/advisories/2011/0124
http://www.vupen.com/english/advisories/2011/0012
http://www.vupen.com/english/advisories/2010/3321
http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
http://secunia.com/advisories/43291
http://secunia.com/advisories/43056
http://secunia.com/advisories/42932
http://secunia.com/advisories/42801
http://secunia.com/advisories/42778
http://secunia.com/advisories/42745
http://openwall.com/lists/oss-security/2010/12/09/4
http://openwall.com/lists/oss-security/2010/12/09/14
http://openwall.com/lists/oss-security/2010/12/08/9
http://openwall.com/lists/oss-security/2010/12/08/5
http://openwall.com/lists/oss-security/2010/12/08/4
http://openwall.com/lists/oss-security/2010/12/02/7
http://openwall.com/lists/oss-security/2010/12/02/4
http://openwall.com/lists/oss-security/2010/12/02/3
http://openwall.com/lists/oss-security/2010/12/02/2
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052513.html
http://googlechromereleases.blogspot.com/2011/01/chrome-os-beta-channel-update.html
http://code.google.com/p/chromium-os/issues/detail?id=10234
http://blog.nelhage.com/2010/12/cve-2010-4258-from-dos-to-privesc/
http://archives.neohapsis.com/archives/fulldisclosure/2010-12/0086.html
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