15467 : Microsoft Exchange Server SMTP Extended Verb X-LINK2STATE Remote Overflow
Printer | http://osvdb.org/15467 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
4	2236	over 6 years ago	about 1 year ago	7 times	90%

Timeline

Disclosure Date	Exploit Publish Date
2005-04-12	2005-04-19

Description

A remote overflow exists in Microsoft Exchange Server. The 'SvrAppendReceivedChunk()' function in the 'xlsasink.dll' library fails to perform proper bounds checking resulting in a buffer overflow. With a specially crafted 'X-LINK2STATE' extended verb request, a remote attacker can cause arbitrary code execution resulting in a loss of integrity.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS
Exploit: Exploit Public, Exploit Commercial
Disclosure: OSVDB Verified

Technical

In order to exploit this vulnerability on Exchange 2003, the attacker needs to have authentication equivalent to a member Exchange server in the domain.

The vulnerability can be exploited without authentication against Exchange 2000.

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability.

Products

Microsoft Corporation	Exchange Server	2003
		2000

References

Security Tracker: 1013687
Bugtraq ID: 13118
SCIP VulDB ID: 1351
Secunia Advisory ID: 14920
CVE ID: 2005-0560 (see also: NVD)
CERT VU: 275193
Microsoft Knowledge Base Article: 894549
Milw0rm: 947
Exploit Database: 947
Mail List Post: http://archives.neohapsis.com/archives/vuln-dev/2005-q2/0012.html
Generic Exploit URL: http://immunitysec.com
http://www.saintcorporation.com/cgi-bin/exploit_info/exchange_x_link2state_bo
Other Advisory URL: http://www.auscert.org.au/render.html?it=4992
http://xforce.iss.net/xforce/alerts/id/193
Vendor URL: http://www.microsoft.com/
Microsoft Security Bulletin: MS05-021

Tools & Filters

	18024
Snort	3627

Credit

Mark Dowd - Avertavertlabs.com - McAfee Avert(tm) Labs
Ben Layer - ISS X-Force

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2005-06-08 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

None found at this time

Comments

Add Comment Hide Add Comment

No Comments.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.