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ZDI-10-247: Novell Groupwise GWPOA HTTP Request Remote Code Execution Vulnerability
From: ZDI Disclosures <zdi-disclosures () tippingpoint com>
Date: Tue, 9 Nov 2010 16:24:05 -0600

ZDI-10-247: Novell Groupwise GWPOA HTTP Request Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-247

November 9, 2010

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

-- Affected Vendors:
Novell

-- Affected Products:
Novell Groupwise

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10328.
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 Novell Groupwise. Authentication is not
required to exploit this vulnerability.

The specific flaw exists in a function responsible for assembling an
HTTP response. The following modules implement this functionality:
gwpoa.exe, gwmta.exe, gwia.exe. When responding to an HTTP request sent
to TCP port 7101 or 7100 or in the case of gwia.exe the user configured
"Message Transfer Port", the process uses the client-specified "Host: "
header to create an HTTP 301 redirection message. Within this code a
local stack buffer is used to store the redirect location and can be
overflown with a sufficiently long header value. A remote attacker can
exploit this vulnerability to execute arbitrary code under the context
of the SYSTEM user.


-- Vendor Response:
Novell states:
Linux - http://download.novell.com/Download?buildid=04oMMaiI9nI~
NetWare/Windows -
http://download.novell.com/Download?buildid=aq06Eoy7rf4~

The HTTP interfaces for the GroupWise agents (Message Transfer Agent,
Post Office Agent, Internet Agent, WebAccess Agent, Monitor Agent) are
vulnerable to an exploit that could allow a remote attacker to execute
arbitrary code on vulnerable installations of Novell Groupwise.
Authentication is not required to exploit this vulnerability.
Affected versions:
GroupWise 8.0x, 8.01x, 8.02. Previous versions of GroupWise are likely
also vulnerable but are no longer supported. Customers on earlier
versions of GroupWise should, at a minimum, upgrade their GroupWise
systems to version 8.02HP (or disable the GroupWise Agents' HTTP
interfaces) in order to secure their system.
This vulnerability was discovered and reported by Anonymous working with
TippingPoint's Zero Day Initiative (http://www.zerodayinitiative.com),
ZDI-CAN-770
Novell bug 627942, CVE number pending
Related TID:
http://www.novell.com/support/search.do?usemicrosite=true&searchString=7007159

-- Disclosure Timeline:
2010-06-10 - Vulnerability reported to vendor
2010-11-09 - Coordinated public release of advisory

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

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

    http://twitter.com/thezdi


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