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             AUSCERT External Security Bulletin Redistribution

                    ESB-2008.0168 -- [Win][UNIX/Linux]
                Apache mod_jk2 host header buffer overflow
                             15 February 2008


        AusCERT Security Bulletin Summary

Product:              Apache mod_jk2 2.0.3-DEV and prior
Publisher:            US-CERT
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated

Original Bulletin:    http://www.kb.cert.org/vuls/id/771937

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US-CERT Vulnerability Note VU#771937

Apache mod_jk2 host header buffer overflow


   A vulnerability exists the legacy version of the mod_jk2 Apache
   module. If successfully exploited, an attacker may be able to run
   arbitrary code on affected system.

I. Description

   The host header allows HTTP 1.1 (RFC 2616) compliant servers to
   host multiple domains using a single IP address.

   Per the IOActive Security Advisory Multiple Buffer Overflows in
   legacy mod_jk2 apache module 2.0.3-DEV and earlier:
       mod_jk2 versions less than 2.0.4 are vulnerable to multiple stack
       overflow vulnerabilities. Specifically, IOActive has discovered
       multiple locations where these vulnerabilities are exploitable via
       the Host request header in any given request. These overflows all
       result in remote code execution under the user of the running apache
       process.  Although a legacy module which is end of life, certain
       vendors may use this module in their products rendering them
       vulnerable to remote exploitation.

II. Impact

   A remote, unauthenticated attacker may be able to execute arbitrary

III. Solution


   mod_jk2 2.0.4 addresses this issue.

Systems Affected

   Vendor                         Status     Date Updated
   Apache HTTP Server Project     Vulnerable 14-Feb-2008




   Thanks to IOActive for information that was used in this report.

   This document was written by Ryan Giobbi.

Other Information

                Date Public 02/13/2008
       Date First Published 02/14/2008 08:19:59 AM
          Date Last Updated 02/14/2008
              CERT Advisory
                   CVE Name CVE-2007-6258
   US-CERT Technical Alerts
                     Metric 4.80
          Document Revision 7

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