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Secunia Security Advisory 34676

Secunia Security Advisory 34676
Posted Apr 14, 2009
Authored by Secunia | Site secunia.com

Secunia Security Advisory - A vulnerability has been reported in OpenBSD, which can be exploited by malicious people to cause a DoS (Denial of Service).

tags | advisory, denial of service
systems | openbsd
SHA-256 | faec59c2f016c1183bd57d70640d0bf66ffdf2f2f21f1fe266bf58e4b2871048

Secunia Security Advisory 34676

Change Mirror Download
----------------------------------------------------------------------

Secunia is pleased to announce the release of the annual Secunia
report for 2008.

Highlights from the 2008 report:
* Vulnerability Research
* Software Inspection Results
* Secunia Research Highlights
* Secunia Advisory Statistics

Request the full 2008 Report here:
http://secunia.com/advisories/try_vi/request_2008_report/

Stay Secure,

Secunia


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

TITLE:
OpenBSD Packet Filter Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA34676

VERIFY ADVISORY:
http://secunia.com/advisories/34676/

DESCRIPTION:
A vulnerability has been reported in OpenBSD, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a NULL-pointer dereference error
in the packet filter ("pf") implementation when performing packet
translations. This can be exploited to cause a kernel panic via a
specially crafted IP packet.

Successful exploitation may require that a translation rule defining
a protocol pertaining to an inadequate IP version is configured.

The vulnerability is reported in OpenBSD 4.3 and 4.4. Other versions
may also be affected.

SOLUTION:
Apply patches.

OpenBSD 4.3:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.3/common/013_pf.patch

OpenBSD 4.4:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.4/common/013_pf.patch

PROVIDED AND/OR DISCOVERED BY:
Rembrandt

CHANGELOG:
2009-04-13: Updated credits and added reporter link to the "Original
Advisory" section.

ORIGINAL ADVISORY:
OpenBSD:
http://www.openbsd.org/errata44.html

Rembrandt:
http://helith.net/txt/openbsd_4.3-current_pf_null_pointer_dereference_kernel_panic.txt

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

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://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/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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