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full-disclosure-uk: [Full-disclosure] [ GLSA 200705-17 ] Apache

[Full-disclosure] [ GLSA 200705-17 ] Apache mod_security: Rule bypass

From: Raphael Marichez <falco_at_nospam>
Date: Thu May 17 2007 - 13:28:13 GMT
To: gentoo-announce@gentoo.org

  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-17
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Severity: Low Title: Apache mod_security: Rule bypass Date: May 17, 2007 Bugs: #169778 ID: 200705-17
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Synopsis


A vulnerability has been discovered in mod_security, allowing a remote attacker to bypass rules.

Background


mod_security is an Apache module designed for enhancing the security of the Apache web server.

Affected packages



Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-www/mod_security < 2.1.1 >= 2.1.1

Description


Stefan Esser discovered that mod_security processes NULL characters as terminators in POST requests using the
application/x-www-form-urlencoded encoding type, while other parsers used in web applications do not.

Impact


A remote attacker could send a specially crafted POST request, possibly bypassing the module ruleset and leading to the execution of arbitrary code in the scope of the web server with the rights of the user running the web server.

Workaround


There is no known workaround at this time.

Resolution


All mod_security users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-www/mod_security-2.1.1"

References


  [ 1 ] CVE-2007-1359
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1359

Availability


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200705-17.xml

Concerns?


Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License


Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



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