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TITLE:
OpenBSD systrace "systrace_preprepl()" Integer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA22324

VERIFY ADVISORY:
http://secunia.com/advisories/22324/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information, Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
OpenBSD 3.x
http://secunia.com/product/100/

DESCRIPTION:
A vulnerability has been reported in OpenBSD's systrace, which can be
exploited by malicious, local users to gain knowledge of potentially
sensitive information, cause a DoS (Denial of Service) and gain
escalated privileges.

The vulnerability is caused due to an integer overflow within the
"systrace_preprepl()" function. By sending large integer values to
the ioctl() syscall, this can be exploited to read kernel memory,
cause a DoS or gain escalated privileges.

Note: This issue was also reported in NetBSD 3.

SOLUTION:
Apply patches.

OpenBSD 3.8:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.8/common/019_systrace.patch

OpenBSD 3.9:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/014_systrace.patch

PROVIDED AND/OR DISCOVERED BY:
Chris Evans

ORIGINAL ADVISORY:
http://openbsd.org/errata.html#systrace
http://scary.beasts.org/security/CESA-2006-003.html

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About:
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