===================================================================== CERT-Renater Note d'Information No. 2006/VULN539 _____________________________________________________________________ DATE : 06/12/2006 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Solaris 8, Solaris 9, Solaris 10, Systems running Apache 1.3 Web Server. ====================================================================== Sun(sm) Alert Notification * Sun Alert ID: 102663 * Synopsis: Security Vulnerabilities in the Apache 1.3 Web Server "mod_rewrite" and "mod_imap" Modules * Category: Security * Product: Solaris 9 Operating System, Solaris 10 Operating System, Solaris 8 Operating System * BugIDs: 6452767, 6452773 * Avoidance: Patch, Workaround * State: Resolved * Date Released: 11-Oct-2006, 04-Dec-2006 * Date Closed: 04-Dec-2006 * Date Modified: 04-Nov-2006 1. Impact Two security vulnerabilities have been found in the Apache HTTP server which affect the Apache 1.3 web server bundled with Solaris 8, 9, and 10. The first issue, a vulnerability in the mod_rewrite Apache HTTP server module (CVE-2006-3747), may allow a local or remote unprivileged user to execute arbitrary code with the privileges of the Apache 1.3 process, or cause a Denial of Service (DoS) to the Apache HTTP process. The Apache process normally runs as the unprivileged user "nobody" (uid 60001). The second issue, a Cross Site Scripting (CSS or XSS) vulnerability in the mod_imap Apache HTTP server module (CVE-2005-3352), may allow a local or remote unprivileged user to steal cookie information, hijack sessions, or cause a loss of data privacy between a client and the server. Additional information regarding these issues is available at: * The Change Log for Apache 1.3, at: http://www.apache.org/dist/httpd/CHANGES_1.3 * CERT VU#395412 at: http://www.kb.cert.org/vuls/id/395412 * CVE-2006-3747 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3747 * CVE-2005-3352 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3352 2. Contributing Factors These issues can occur in the following releases: SPARC Platform * Solaris 8 with patches 116973-01 through 116973-04 and without patch 116973-05 * Solaris 9 with patches 113146-03 through 113146-07 and without patch 113146-08 * Solaris 10 without patch 122911-02 x86 Platform * Solaris 8 with patches 116974-01 through 116974-04 and without patch 116974-05 * Solaris 9 with patches 114145-02 through 114145-06 and without patch 114145-07 * Solaris 10 without patch 122912-02 Note 1: Apache 2.0 ships with Solaris 10 and is impacted by the issues referenced in this Sun Alert. For details on the impact to Apache 2.0 see Sun Alert 102662. Note 2: A system is only vulnerable to these issues if the Apache 1.3 web server has been configured and is running on the system. The following command can be executed to determine if the Apache(1M) httpd daemon is currently running on the system: $ /usr/bin/ps -ef | grep httpd nobody 103892 102307 0 Jan 20 ? 0:27 /usr/apache/bin/httpd The Solaris bundled Apache 1.3 web server will start automatically at boot time if the file "/etc/apache/httpd.conf" exists, and "/etc/rc3.d/S50apache" has not been disabled. Customers who have built and/or installed a vulnerable version of Apache on any version of Solaris are at risk. Refer to http://httpd.apache.org/security_report.html for information about vulnerable unbundled Apache versions. Note 3: The mod_rewrite vulnerability (CVE-2006-3747) is present in Apache versions 1.3.28 to 1.3.36 and Solaris 10 bundled Apache 1.3 versions 1.3.28 to 1.3.35, Solaris 9 bundled Apache 1.3 versions 1.3.28 to 1.3.35. The mod_rewrite vulnerability is addressed in the patches listed in the "Resolution" section of this Sun Alert which update Apache 1.3 to 1.3.36 built Sep 5 2006 for Solaris 10. To determine the version and build date of the Solaris bundled Apache 1.3 web server installed on a host, the following command can be run: $ /usr/apache/bin/httpd -v Server version: Apache/1.3.31 (Unix) Server built: Jun 30 2005 05:48:24 Note 4: This issue only affects hosts which make use of the Apache URL Rewriting Engine module (mod_rewrite). To determine if this module is enabled, a command such as the following can be run for all of the configuration files that define the running Apache configuration: $ grep RewriteEngine /etc/apache/httpd.conf RewriteEngine on This option defaults to "off", therefore, if it is not present in the configuration files, the host is not affected. Note 5: The mod_imap vulnerability (CVE-2005-3352) only affects systems which make use of the Apache IMAP module (mod_imap) along with image map files. To determine if the mod_imap module is enabled for use with image map files, a command such as the following can be run for all of the configuration files that define the running Apache configuration: $ grep 'imap-file map' /etc/apache2/httpd.conf #AddHandler imap-file map This option is not enabled by default as the initial hash sign '#' indicates. 3. Symptoms There are no predictable symptoms that would indicate the described issues have occurred. 4. Relief/Workaround To workaround the mod_rewrite issue (CVE-2006-3747), disable the "RewriteEngine" option in the Apache 2 httpd.conf file. The RewriteEngine line should look like: RewriteEngine off Refer to http://httpd.apache.org/docs/1.3/mod/mod_rewrite.html for details. To workaround the mod_imap issue (CVE-2005-3352), disable the "imap-file map" entry in the Apache 2 httpd.conf file. The "imap-file map" entry should look like: #AddHandler imap-file map Refer to http://httpd.apache.org/docs/1.3/mod/mod_imap.html for details. 5. Resolution These issues are addressed in the following releases: SPARC Platform * Solaris 8 with patch 116973-05 or later * Solaris 9 with patch 113146-08 or later * Solaris 10 with patch 122911-02 or later x86 Platform * Solaris 8 with patch 116974-05 or later * Solaris 9 with patch 114145-07 or later * Solaris 10 with patch 122912-02 or later Change History 04-Nov-2006: * State: Resolved * Updated Contributing Factors and Resolution sections This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. 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