From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Nov 18 2003 - 09:40:33 CST

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

TITLE:
OpenBSD compat_ibcs2 Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA10246

VERIFY ADVISORY:
http://www.secunia.com/advisories/10246/

CRITICAL:
Less critical

IMPACT:
Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
OpenBSD 3.x

DESCRIPTION:
A vulnerability has been reported in OpenBSD, which can be exploited
by malicious, local users to escalate their privileges or cause a DoS
(Denial of Service).

The vulnerability is caused due to a boundary error in
"compat_ibcs2". This can be exploited by running a specially crafted
binary, which causes a buffer overflow.

Successful exploitation may allow execution of arbitrary code with
escalated privileges on OpenBSD 3.3. However, exploitation is
detected by ProPolice in OpenBSD 3.4 and therefore only causes a DoS.

SOLUTION:
Apply patch.

OpenBSD 3.4:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/i386/006_ibcs2.patch

OpenBSD 3.3:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/i386/011_ibcs2.patch

REPORTED BY / CREDITS:
Georgi Guninski

ORIGINAL ADVISORY:
OpenBSD kernel overflow:
http://www.guninski.com/msuxobsd2.html

OpenBSD:
http://www.openbsd.org/errata.html#ibcs2

----------------------------------------------------------------------

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:
http://www.secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://www.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.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories

----------------------------------------------------------------------

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]