Secunia Security Advisory - Christer Oberg has reported a vulnerability in FreeBSD, which can be exploited by malicious, local users to gain knowledge of potentially sensitive information.
5fad55babca9202b5132fa6d5964985e22946037f4dd464b545bce26a4a15219
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TITLE:
FreeBSD "i386_get_ldt()" Kernel Memory Disclosure Vulnerability
SECUNIA ADVISORY ID:
SA15261
VERIFY ADVISORY:
http://secunia.com/advisories/15261/
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:
Christer Oberg has reported a vulnerability in FreeBSD, which can be
exploited by malicious, local users to gain knowledge of potentially
sensitive information.
The vulnerability is caused due to an input validation error in the
"i386_get_ldt()" system call and can be exploited to copy arbitrary
portions of data from kernel space into userland by passing negative
or extremely large arguments to the system call.
SOLUTION:
Update FreeBSD or apply patch.
Fixed versions:
2005-05-06 02:40:19 UTC (RELENG_5, 5.4-STABLE)
2005-05-06 02:40:49 UTC (RELENG_5_4, 5.4-RELEASE)
2005-05-06 02:40:32 UTC (RELENG_5_3, 5.3-RELEASE-p12)
2005-05-06 02:39:35 UTC (RELENG_4, 4.11-STABLE)
2005-05-06 02:40:05 UTC (RELENG_4_11, 4.11-RELEASE-p6)
2005-05-06 02:39:52 UTC (RELENG_4_10, 4.10-RELEASE-p11)
Patch for FreeBSD 4.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:07/ldt4.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:07/ldt4.patch.asc
Patch for FreeBSD 5.x:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:07/ldt5.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:07/ldt5.patch.asc
PROVIDED AND/OR DISCOVERED BY:
Christer Oberg
ORIGINAL ADVISORY:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:07.ldt.asc
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