CVE-2010-4258

MEDIUM

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.

References

http://archives.neohapsis.com/archives/fulldisclosure/2010-12/0086.html

http://blog.nelhage.com/2010/12/cve-2010-4258-from-dos-to-privesc/

http://code.google.com/p/chromium-os/issues/detail?id=10234

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177

http://googlechromereleases.blogspot.com/2011/01/chrome-os-beta-channel-update.html

http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052513.html

http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html

http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html

http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html

http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html

http://marc.info/?l=linux-kernel&m=129117048916957&w=2

http://openwall.com/lists/oss-security/2010/12/02/2

http://openwall.com/lists/oss-security/2010/12/02/3

http://openwall.com/lists/oss-security/2010/12/02/4

http://openwall.com/lists/oss-security/2010/12/02/7

http://openwall.com/lists/oss-security/2010/12/08/4

http://openwall.com/lists/oss-security/2010/12/08/5

http://openwall.com/lists/oss-security/2010/12/08/9

http://openwall.com/lists/oss-security/2010/12/09/14

http://openwall.com/lists/oss-security/2010/12/09/4

http://secunia.com/advisories/42745

http://secunia.com/advisories/42778

http://secunia.com/advisories/42801

http://secunia.com/advisories/42932

http://secunia.com/advisories/43056

http://secunia.com/advisories/43291

http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2

http://www.mandriva.com/security/advisories?name=MDVSA-2011:029

http://www.vupen.com/english/advisories/2010/3321

http://www.vupen.com/english/advisories/2011/0012

http://www.vupen.com/english/advisories/2011/0124

http://www.vupen.com/english/advisories/2011/0213

http://www.vupen.com/english/advisories/2011/0298

http://www.vupen.com/english/advisories/2011/0375

https://bugzilla.redhat.com/show_bug.cgi?id=659567

https://lkml.org/lkml/2010/12/1/543

Details

Source: MITRE

Published: 2010-12-30

Updated: 2013-09-13

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 6.2

Vector: (AV:L/AC:H/Au:N/C:C/I:C/A:C)

Impact Score: 10

Exploitability Score: 1.9

Severity: MEDIUM