Advisory Details

April 18th, 2007

Novell Groupwise WebAccess Base64 Decoding Stack Overflow Vulnerability

ZDI-07-015
ZDI-CAN-181

CVE ID CVE-2007-2171
CVSS SCORE
AFFECTED VENDORS Novell
AFFECTED PRODUCTS GroupWise WebAccess
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5295. 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 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.

ADDITIONAL DETAILS Novell has issued an update to correct this vulnerability. More details can be found at:
http://download.novell.com/Download?buildid=8RF83go0nZg~
DISCLOSURE TIMELINE
  • 2007-03-19 - Vulnerability reported to vendor
  • 2007-04-18 - Coordinated public release of advisory
CREDIT Tenable Network Security
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