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

SECUNIA ADVISORY ID:
SA22324

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

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information, Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
OpenBSD 3.x
https://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:
https://openbsd.org/errata.html#systrace
https://scary.beasts.org/security/CESA-2006-003.html

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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:
https://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
https://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.

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