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

Want a new IT Security job?

Vacant positions at Secunia:
http://secunia.com/secunia_vacancies/

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

TITLE:
FreeBSD Hyper-Threading Support Information Disclosure

SECUNIA ADVISORY ID:
SA15348

VERIFY ADVISORY:
http://secunia.com/advisories/15348/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

OPERATING SYSTEM:
FreeBSD 4.x
http://secunia.com/product/139/
FreeBSD 5.x
http://secunia.com/product/1132/

DESCRIPTION:
Colin Percival has reported a vulnerability in FreeBSD, which can be
exploited by malicious, local users to gain knowledge of sensitive
information.

The vulnerability is caused due to an unspecified error in the
Hyper-Threading support and may disclose various sensitive
information.

Successful exploitation requires that the system has a processor with
Hyper-Threading support.

SOLUTION:
Update FreeBSD or apply patch.

Fixed versions:
2005-05-13 00:13:00 UTC (RELENG_5, 5.4-STABLE)
2005-05-13 00:13:00 UTC (RELENG_5_4, 5.4-RELEASE-p1)
2005-05-13 00:13:00 UTC (RELENG_5_3, 5.3-RELEASE-p15)
2005-05-13 00:13:00 UTC (RELENG_4, 4.11-STABLE)
2005-05-13 00:13:00 UTC (RELENG_4_11, 4.11-RELEASE-p9)
2005-05-13 00:13:00 UTC (RELENG_4_10, 4.10-RELEASE-p14)

Patch for FreeBSD 4.10:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt410.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt410.patch.asc

Patch for FreeBSD 4.11:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt411.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt411.patch.asc

Patch for FreeBSD 5.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt5.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:09/htt5.patch.asc

PROVIDED AND/OR DISCOVERED BY:
Colin Percival

ORIGINAL ADVISORY:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.asc

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

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/secunia_security_advisories/

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

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