SCO OpenServer IMAP daemon: Execute Arbitrary Code/Commands -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.0124
         SCO Openserver IMAP Daemon Long Verb Parsing Remote Code
                          Execution Vulnerability
                              8 February 2011

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           SCO OpenServer IMAP daemon
Publisher:         Zero Day Initiative
Operating System:  SCO
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        None

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

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SCO Openserver IMAP Daemon Long Verb Parsing Remote Code Execution
Vulnerability

   ZDI-11-058: February 7th, 2011

CVSS Score

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

Affected Vendors

   SCO

Affected Products

   OpenServer

TippingPoint(TM) IPS Customer Protection

   TippingPoint IPS customers are protected against this vulnerability by
   Digital Vaccine protection filter ID 6535. For further product
   information on the TippingPoint IPS:
   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.

Vendor Response

   SCO states:

Disclosure Timeline

   2008-11-10 - Vulnerability reported to vendor
   2011-02-07 - Coordinated public release of advisory

Credit

   This vulnerability was discovered by:
   Anonymous

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