ZDI-11-058: SCO Openserver IMAP Daemon Long Verb Parsing Remote Code Execution Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

ZDI-11-058: SCO Openserver IMAP Daemon Long Verb Parsing Remote Code Execution 
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-058

February 7, 2011 - This vulnerability is being disclosed publicly without a 
patch in accordance with the ZDI 180 day deadline. To view mitigations for this 
vulnerability please see:  
http://dvlabs.tippingpoint.com/blog/2011/02/07/zdi-disclosure-sco

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
SCO

-- Affected Products:
SCO OpenServer

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6535. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of the SCO OpenServer IMAP daemon.
Authentication is not required to exploit this vulnerability.

The specific flaw exists within the imapd process responsible for
handling remote IMAP requests. The process does not properly validate
IMAP commands and arguments. Supplying an overly long command followed
by an invalid argument can cause an exploitable overflow to occur. This
vulnerability can be leveraged to execute arbitrary code.

-- Disclosure Timeline:
2008-11-10 - Vulnerability reported to vendor
2011-02-07 - Public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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