__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Apache mod_jk2 Host Vulnerability [US-CERT Vulnerability Note VU#771937] February 15, 2008 13:00 GMT Number S-191 ______________________________________________________________________________ PROBLEM: A vulnerability exists in the legacy version of the mod_jk2 Apache module. If successfully exploited, an attacker may be able to run arbitrary code on an affected system. PLATFORM: Apache mod_jk2 versions less than 2.0.4 DAMAGE: Execution arbitrary code. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is LOW. A remote, unauthenticated attacker may be able ASSESSMENT: to execute arbitrary code. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-191.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/771937 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-6258 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#771937 *****] Vulnerability Note VU#771937 Apache mod_jk2 host header buffer overflow Overview 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 code. III. Solution Upgrade mod_jk2 2.0.4 addresses this issue. Systems Affected Vendor Status Date Updated Apache HTTP Server Project Vulnerable 14-Feb-2008 References http://www.ioactive.com/vulnerabilities/mod_jk2LegacyBufferOverflowAdvisory.pdf http://today.java.net/pub/n/mod_jk22.0.4 http://www.w3.org/Protocols/rfc2616/rfc2616.html http://www.jmarshall.com/easy/http/#http1.1c1 Credit 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 [***** End US-CERT Vulnerability Note VU#771937 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of US-CERT for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. 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A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. 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