Novell NetWare Enterprise Web Server /perl/ handler vulnerable to buffer overflow

2003-07-23T00:00:00
ID VU:185593
Type cert
Reporter CERT
Modified 2003-08-08T00:00:00

Description

Overview

Novell NetWare Enterprise Web Server contains a buffer overflow vulnerability that can be exploited via the /perl/ HTTP request handler. A remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the server process.

Description

Novell NetWare 5.1 and 6.0 include a web server called NetWare Enterprise Server. The server contains a buffer overflow vulnerability that can be triggered by a specially crafted HTTP request directed to the /perl/ handler. The vulnerability occurs in the module CGI2PERL.NLM, which is mapped to the /perl/ directory in an HTTP request. Further information is available in Novell Technical Information Document 2966549 and PROTEGO Security Advisory #PSA200301.

NetWare 5.1 with NetWare Enterprise Web Server 3.6 and certain NetWare 6.0 systems (NetWare Enterprise Web Server 6.00d) are affected. In particular, NetWare 6.0 systems that have been upgraded from 5.1 may be affected.


Impact

A remote attacker could cause the web server to hang or restart (ABEND), resulting in a denial of service. Since EIP is overwritten, it may be possible for the attacker to execute arbitrary code with the privileges of the server process (Admin).


Solution

Apply a patch
Apply the appropriate patch referenced in Novell TID 2966549.


Unmap /perl/ handler

If it is not needed, unmap the /perl/ request handler. Information about how to configure the /perl/ CGI directory can be found in Novell's Perl documentation for Netware Enterprise Web Server.


Systems Affected

Vendor| Status| Date Notified| Date Updated
---|---|---|---
Novell| | 08 May 2003| 23 Jul 2003
If you are a vendor and your product is affected, let us know.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A

References

  • <http://www.protego.dk/advisories/200301.html>
  • <http://support.novell.com/cgi-bin/search/searchtid.cgi?/2966549.htm>
  • <http://developer.novell.com/ndk/doc/perl5/prl57enu/data/hyyq6w6r.html>
  • <http://developer.novell.com/ndk/doc/general/glossenu/data/alffzwf.html>
  • <http://www.secunia.com/advisories/9345/>

Credit

This vulnerability was reported by Uffe Nielsen of PROTEGO .

This document was written by Art Manion.

Other Information

  • CVE IDs: CAN-2003-0562
  • Date Public: 23 Jul 2003
  • Date First Published: 23 Jul 2003
  • Date Last Updated: 08 Aug 2003
  • Severity Metric: 7.22
  • Document Revision: 35