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Secunia Security Advisory 36955

Secunia Security Advisory 36955
Posted Oct 5, 2009
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Some vulnerabilities have been reported in FreeBSD, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and potentially gain escalated privileges.

tags | advisory, denial of service, local, vulnerability
systems | freebsd
SHA-256 | 002fc61e823d3865bd221ece8732fb570ba4d979b6b9381cf9483f0bf04b2322

Secunia Security Advisory 36955

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(Vulnerability Assessment Remediation Management)

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Implement it through Secunia.

For more information visit:
http://secunia.com/advisories/business_solutions/

Alternatively request a call from a Secunia representative today to
discuss how we can help you with our capabilities contact us at:
sales@secunia.com

----------------------------------------------------------------------

TITLE:
FreeBSD Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA36955

VERIFY ADVISORY:
http://secunia.com/advisories/36955/

DESCRIPTION:
Some vulnerabilities have been reported in FreeBSD, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service) and potentially gain escalated privileges.

1) A use-after-free error caused by a race condition within the pipe
"close()" implementation related to kqueues can be exploited to e.g.
execute arbitrary code with kernel privileges.

2) A NULL pointer dereference error can be exploited to e.g. execute
arbitrary code with kernel privileges.

For more information:
SA36945

NOTE: Additionally, the vendor provides an enhancement against NULL
pointer exploits.

SOLUTION:
Update FreeBSD or apply patches.

2009-10-02 18:09:56 UTC (RELENG_6, 6.4-STABLE)
2009-10-02 18:09:56 UTC (RELENG_6_4, 6.4-RELEASE-p7)
2009-10-02 18:09:56 UTC (RELENG_6_3, 6.3-RELEASE-p13)

Patches:
1) http://security.FreeBSD.org/patches/SA-09:13/pipe.patch.asc
2) http://security.FreeBSD.org/patches/SA-09:14/devfs6.patch.asc

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Przemyslaw Frasunek.

ORIGINAL ADVISORY:
1) http://security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc
2) http://security.freebsd.org/advisories/FreeBSD-SA-09:14.devfs.asc

http://security.freebsd.org/advisories/FreeBSD-EN-09:05.null.asc

OTHER REFERENCES:
SA36945:
http://secunia.com/advisories/36945/

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

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