OpenBSD dhcpd Buffer Overflow Vulnerability - Secunia Advisories - Vulnerability Intelligence

OpenBSD dhcpd Buffer Overflow Vulnerability
Secunia Advisory:	SA27160	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-10-10
Last Update:	2007-10-11
Popularity:	8,148 views

Critical:	Moderately critical
Impact:	DoS System access
Where:	From local network
Solution Status:	Vendor Patch

OS:	OpenBSD 3.x OpenBSD 4.0 OpenBSD 4.1 OpenBSD 4.2

Binary Analysis:	BA255 :: Available for 1 Credit

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-0063 CVE-2007-5365

Description: A vulnerability has been reported in OpenBSD, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system. The vulnerability is caused due to the improper handling of DHCP requests within dhcpd in the "cons_options()" function in options.c. This can be exploited to cause a stack-based buffer overflow by sending a specially crafted DHCP request specifying a maximum message size between DHCP_FIXED_LEN and DHCP_FIXED_LEN + 3. Successful exploitation may allow the execution of arbitrary code. Solution: Apply vendor patches. OpenBSD 4.0: ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/common/016_dhcpd.patch OpenBSD 4.1: ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.1/common/010_dhcpd.patch OpenBSD 4.2: ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.2/common/001_dhcpd.patch Provided and/or discovered by: Nahuel Riva and Gerardo Richarte, CORE IMPACT Exploit Writers Team Changelog: 2007-10-11: Updated the "Description" section and the credits. Added CVE reference. 2007-10-11: Added CVE reference. Original Advisory: Core Security Technologies: http://www.coresecurity.com/index.php...ontentMod&action=item&id=1962 OpenBSD: http://www.openbsd.org/errata40.html Extended Solution: The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.

Track this Secunia Advisory
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released. Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.

About this Secunia Advisory
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

Latest Advisories

Today

New advisories:	4
New vulnerabilities:	12
Updated advisories:	6

Not // 64 views

Apache Tomcat "RemoteFilterValve" Security Bypass Security Issue

Less // 52 views

Debian update for openldap

Moderately // 50 views

Debian update for ruby1.9

Moderately // 49 views

Debian update for ruby1.8

10th Oct, 2008

New advisories:	15
New vulnerabilities:	83
Updated advisories:	41

Moderately // 784 views

ScriptsEz Easy Image Downloader "id" File Disclosure Vulnerability

Moderately // 769 views

Built2go Real Estate Listings "event_id" SQL Injection

Highly // 1,125 views

Sun Java System Web Proxy Server FTP Subsystem Buffer Overflow

Moderately // 802 views

Red Hat update for cups

Highly // 814 views

DFF PHP Framework API "DFF_config[dir_incl ude]" File Inclusion Vulnerabilities

Not // 888 views

FUJITSU Interstage Products Apache Tomcat Security Bypass

Solutions | More...

Send Feedback to Secunia
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com. Ideas, suggestions, and other feedback are most welcome.