webalizer vulnerable to buffer overflow when performing reverse DNS lookups

Overview

A remotely exploitable buffer overflow exists in all versions of webalizer prior to version 2.01-10.

Description

webalizer is a web server log file analysis program.

webalizer has the ability do resolve hostnames as part of the process of generating reports. A buffer overflow exists in the code that resolves the hostnames. As a result, an attacker controlled DNS server can send an unusually large DNS response message and corrupt the data produced by the program and/or gain root privileges. Note that webalizer would have to be actively performing a DNS lookup in order for this vulnerability to be exploited.

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Impact

An attacker controlled DNS server can send an unusually large DNS response message and corrupt the data produced by the program and/or gain root privileges.

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Solution

Apply a vendor patch. If a patch is not available, upgrade to version 2.01-10 or later.

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Vendor Information

582923

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Conectiva __ Affected

Updated: October 28, 2002

Status

Affected

Vendor Statement

http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000476

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23582923 Feedback>).

Engarde __ Affected

Updated: October 28, 2002

Status

Affected

Vendor Statement

<http://www.linuxsecurity.com/advisories/other_advisory-2027.html&gt;

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23582923 Feedback>).

Sco-Linux __ Affected

Updated: October 28, 2002

Status

Affected

Vendor Statement

<ftp://ftp.sco.com/pub/security/OpenLinux/CSSA-2002-036.0.txt&gt;

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23582923 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.mrunix.net/webalizer/&gt;
• <http://www.mrunix.net/webalizer/news.html&gt;
• <http://www.securityfocus.com/bid/4504&gt;
• <http://online.securityfocus.com/archive/1/267551&gt;
• http://marc.theaimsgroup.com/?l=bugtraq&m=101888467527673&w=2
• <http://www.iss.net/security_center/static/8837.php&gt;

Acknowledgements

Thanks to Spybreak for reporting this vulnerability.

This document was written by Ian A Finlay.

Other Information

CVE IDs:	CVE-2002-0180
Severity Metric:	16.67 Date Public: