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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

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