__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Apache Security Update [Red Hat RHSA-2006:0618-4] August 9, 2006 19:00 GMT Number Q-282 [REVISED 11 Aug 2006] [REVISED 5 Sept 2006] ______________________________________________________________________________ PROBLEM: A bug was found in Apache where an invalid Expect header sent to the server was returned to the user in an unescaped error message. PLATFORM: Red Hat Desktop (v. 3 & v. 4) Red Hat Enterprise Linux AS, ES, WS (v. 2.1, v. 3, & v. 4) Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor Debian GNU/Linux 3.1 alias sarge DAMAGE: Could allow an attacker to perform a cross-site scripting attack if a victim was tricked into connecting to a site and sending a carefully crafted Expect header. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Could allow an attacker to perform a ASSESSMENT: cross-site scripting attack if a victim was tricked into connecting to a site and sending a carefully crafted Expect header. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-282.shtml ORIGINAL BULLETIN: Red Hat RHSA-2006:0618-4 https://rhn.redhat.com/errata/RHSA-2006-0618.html ADDITIONAL LINKS: Red Hat RHSA-2006:0619-8 https://rhn.redhat.com/errata/RHSA-2006-0619.html Debian Security Advisory DSA-1167-1 http://www.debian.org/security/2006/dsa-1167 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-3918 ______________________________________________________________________________ REVISION HISTORY: 08/11/2006 - revised to add a link to Red Hat RHSA-2006:0619-9 for Red Hat Desktop (v. 3 & v. 4) and Enterprise Linux AS, ES, WS (v. 3 & v. 4). 09/05/2006 - revised to add a link to Debian Security Advisory DSA-1167-1 for Debian GNU/Linux 3.1 alias sarge. [***** Start Red Hat RHSA-2006:0618-4 *****] Important: apache security update Advisory: RHSA-2006:0618-4 Type: Security Advisory Issued on: 2006-08-08 Last updated on: 2006-08-08 Affected Products: Red Hat Enterprise Linux AS (v. 2.1) Red Hat Enterprise Linux ES (v. 2.1) Red Hat Enterprise Linux WS (v. 2.1) Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor CVEs (cve.mitre.org): CVE-2006-3918 Details Updated Apache httpd packages that correct a security issue are now available for Red Hat Enterprise Linux 2.1. This update has been rated as having important security impact by the Red Hat Security Response Team. The Apache HTTP Server is a popular Web server available for free. A bug was found in Apache where an invalid Expect header sent to the server was returned to the user in an unescaped error message. This could allow an attacker to perform a cross-site scripting attack if a victim was tricked into connecting to a site and sending a carefully crafted Expect header. (CVE-2006-3918) While a web browser cannot be forced to send an arbitrary Expect header by a third-party attacker, it was recently discovered that certain versions of the Flash plugin can manipulate request headers. If users running such versions can be persuaded to load a web page with a malicious Flash applet, a cross-site scripting attack against the server may be possible. Users of Apache should upgrade to these updated packages, which contain a backported patch to correct this issue. Solution Before applying this update, make sure all previously released errata relevant to your system have been applied. This update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. Updated packages Red Hat Enterprise Linux AS (v. 2.1) -------------------------------------------------------------------------------- SRPMS: apache-1.3.27-11.ent.src.rpm 6195921625144194e4483f3f31a31025 IA-32: apache-1.3.27-11.ent.i386.rpm 3139ab4d1534b2dc8467a4dea8ea7004 apache-devel-1.3.27-11.ent.i386.rpm 5a2c1a85a3fc5db0b29f59269788a4a6 apache-manual-1.3.27-11.ent.i386.rpm 921105306fd10ce908c60d6cd9a88298 IA-64: apache-1.3.27-11.ent.ia64.rpm 4e05401ab82413c501bf83e65bfd91cb apache-devel-1.3.27-11.ent.ia64.rpm 1c71728d8382407c71331b2bc7c938b7 apache-manual-1.3.27-11.ent.ia64.rpm 8f7177083aeb3997af5b92bc5f63013f Red Hat Enterprise Linux ES (v. 2.1) -------------------------------------------------------------------------------- SRPMS: apache-1.3.27-11.ent.src.rpm 6195921625144194e4483f3f31a31025 IA-32: apache-1.3.27-11.ent.i386.rpm 3139ab4d1534b2dc8467a4dea8ea7004 apache-devel-1.3.27-11.ent.i386.rpm 5a2c1a85a3fc5db0b29f59269788a4a6 apache-manual-1.3.27-11.ent.i386.rpm 921105306fd10ce908c60d6cd9a88298 Red Hat Enterprise Linux WS (v. 2.1) -------------------------------------------------------------------------------- SRPMS: apache-1.3.27-11.ent.src.rpm 6195921625144194e4483f3f31a31025 IA-32: apache-1.3.27-11.ent.i386.rpm 3139ab4d1534b2dc8467a4dea8ea7004 apache-devel-1.3.27-11.ent.i386.rpm 5a2c1a85a3fc5db0b29f59269788a4a6 apache-manual-1.3.27-11.ent.i386.rpm 921105306fd10ce908c60d6cd9a88298 Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor -------------------------------------------------------------------------------- SRPMS: apache-1.3.27-11.ent.src.rpm 6195921625144194e4483f3f31a31025 IA-64: apache-1.3.27-11.ent.ia64.rpm 4e05401ab82413c501bf83e65bfd91cb apache-devel-1.3.27-11.ent.ia64.rpm 1c71728d8382407c71331b2bc7c938b7 apache-manual-1.3.27-11.ent.ia64.rpm 8f7177083aeb3997af5b92bc5f63013f (The unlinked packages above are only available from the Red Hat Network) Bugs fixed (see bugzilla for more information) 200738 - CVE-2006-3918 Expect header XSS References http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3918 http://www.redhat.com/security/updates/classification/#important -------------------------------------------------------------------------------- These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from: https://www.redhat.com/security/team/key/#package The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/ [***** End Red Hat RHSA-2006:0618-4 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Red Hat 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. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. 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. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) Q-272: Vulnerability in HTML Help Q-276: Vulnerability in Windows Explorer Q-277: Cumulative Security Update for Internet Explorer Q-273: Vulnerability in Windows Kernel Q-274: Vulnerability in Microsoft Visual Basic for Application Q-275: Vulnerabilities in Microsoft Office Q-278: Vulnerability in Microsoft Windows Q-279: Vulnerability in Windows Kernel Q-280: Vulnerabilities in Microsoft Windows Hyperlink Object Library Q-281: Freradius