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TITLE:
FreeBSD Kernel Memory Disclosure Vulnerabilities

SECUNIA ADVISORY ID:
SA15262

VERIFY ADVISORY:
http://secunia.com/advisories/15262/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

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

DESCRIPTION:
Christian S.J. Peron has reported some vulnerabilities in FreeBSD,
which can be exploited by malicious, local users to gain knowledge of
potentially sensitive information.

The vulnerabilities are caused due to various errors in the kernel
where variable-sized input is passed to applications in fixed-length
buffers without zeroing the unused portion of the buffers.

Successful exploitation discloses random data in kernel memory.

SOLUTION:
Update FreeBSD or apply patch.

Fixed versions:
2005-05-06 02:50:00 UTC (RELENG_5, 5.4-STABLE)
2005-05-06 02:51:10 UTC (RELENG_5_4, 5.4-RELEASE)
2005-05-06 02:50:35 UTC (RELENG_5_3, 5.3-RELEASE-p13)
2005-05-06 02:48:46 UTC (RELENG_4, 4.11-STABLE)
2005-05-06 02:49:35 UTC (RELENG_4_11, 4.11-RELEASE-p7)
2005-05-06 02:49:08 UTC (RELENG_4_10, 4.10-RELEASE-p12)

Patch for FreeBSD 4.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:08/kmem4.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:08/kmem4.patch.asc

Patch for FreeBSD 5.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:08/kmem5.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:08/kmem5.patch.asc

PROVIDED AND/OR DISCOVERED BY:
Christian S.J. Peron

ORIGINAL ADVISORY:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:08.kmem.asc

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About:
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