Novell GroupWise WebAccess Buffer Overflow in Processing HTTP Basic Authentication Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1017932|
SecurityTracker URL: http://securitytracker.com/id/1017932
(Links to External Site)
Date: Apr 18 2007
Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 7 prior to SP2|
A vulnerability was reported in GroupWise. A remote user can execute arbitrary code on the target system.|
A remote user can send a specially crafted HTTP Basic authentication request to 'GWINTER.exe' on TCP ports 7205 or 7211 to trigger a buffer overflow and execute arbitrary code on the target system. The code will run with the privileges of the target service.
The vendor was notified on March 19, 2007.
Tenable Network Security discovered this vulnerability.
The original advisory is available at:
A remote user can execute arbitrary code on the target system.|
The vendor has issued a fix (GroupWise 7 SP2).|
The Novell advisories are available at:
Vendor URL: www.novell.com/ (Links to External Site)
Source Message Contents
Subject: [Full-disclosure] ZDI-07-015: Novell Groupwise WebAccess Base64|
ZDI-07-015: Novell Groupwise WebAccess Base64 Decoding Stack Overflow
April 18, 2007
-- CVE ID:
-- Affected Vendor:
-- Affected Products:
-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since April 19, 2007 by Digital Vaccine protection
filter ID 5295. For further product information on the TippingPoint IPS:
-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell Groupwise WebAccess. Authentication
is not required to exploit this vulnerability.
The specific flaw exists in the GWINTER.exe process bound by default on
TCP ports 7205 and 7211. During the handling of an HTTP Basic
authentication request, the process copies user-supplied base64 data
into a fixed length stack buffer. Sending at least 336 bytes will
trigger a stack based buffer overflow due to a vulnerable
base64_decode() call. Exploitation of this issue can result in
arbitrary code execution.
-- Vendor Response:
Novell has issued an update to correct this vulnerability. More details
can be found at:
-- Disclosure Timeline:
2007.03.19 - Vulnerability reported to vendor
2007.04.18 - Coordinated public release of advisory
2007.04.19 - Digital Vaccine released to TippingPoint customers
This vulnerability was discovered by Tenable Network Security.
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