15467 : Microsoft Exchange Server SMTP Extended Verb X-LINK2STATE Remote Overflow
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Apr 12, 2005

Discovery
Unknown

Dates

Exploit
Apr 19, 2005

Solution
Unknown

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
Exploit: Exploit Rumored
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
Watch-list
Exchange Server
Watch-list
 2003
2000

References

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?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_1

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.

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