-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Announcement Package: mailman Announcement-ID: SUSE-SA:2005:007 Date: Monday, Feb 14th 2005 10:30 MET Affected products: 8.2, 9.0, 9.1, 9.2 SUSE Linux Enterprise Server 8, 9 Vulnerability Type: remote file disclosure Severity (1-10): 5 SUSE default package: yes Cross References: CAN-2005-0202 CAN-2004-1143 CAN-2004-1177 Content of this advisory: 1) security vulnerability resolved: - remote file disclosure by directory traversal - cross site scripting - requires additional package python-xml 2) solution/workaround 3) special instructions and notes 4) package location and checksums 5) pending vulnerabilities, solutions, workarounds: 6) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion Mailman is a flexible mailing list management tool. It provides mail controlled subscription front ends and also includes CGI scripts to handle subscription, moderation and archive retrieval and other options. Due to incomplete input validation the "private" CGI script which handles archive retrieval could be used to read any file on the system, including the configuration database of the mailman lists which include passwords in plain text. A remote attacker just needs a valid account on one mailing list managed by this mailman instance. This update fixes this problem and is tracked under the Mitre CVE ID CAN-2005-0202. Please see section (3), "special instructions and notes". Our previous mailman update (only announced in the SUSE Summary Report) additionally fixed the following two security problems: - a cross site scripting problem (CAN-2004-1177) - too weak auto generated passwords (CAN-2004-1143) This previous security fix requires the additional "python-xml" RPM which was not required before. 2) solution/workaround Temporary workarounds: - Disable execution of the CGI scripts of mailman by either moving the scripts away, or disabling it in the web servers configuration. - Edit the true_path function in the Mailman/Cgi/private.py script to contain: SLASH = '/' def true_path(path): "Ensure that the path is safe by removing .." parts = [x for x in path.split(SLASH) if x not in ('.', '..')] return SLASH.join(parts)[1:] 3) special instructions and notes After installing the upgraded packages, please make sure that your mailing list config databases have not been retrieved by attackers. You can do so by checking for patterns like ".....///" in your web servers access logs. If this is the case: - Reset all user passwords. The last security update includes a new "change_member_pw" script which can do that easily. - Change the mailing list admin password. - Optionally: Look for members which should not be in the list 4) package location and checksums Download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement. Then, install the package using the command "rpm -Fhv file.rpm" to apply the update. Our maintenance customers are being notified individually. The packages are being offered for installation from the maintenance web. x86 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/mailman-2.1.5-5.6.i586.rpm 714996a830908538e30e6109faf58d23 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/mailman-2.1.5-5.6.i586.patch.rpm 0f11a3a3c2631c94eef59ef1842e7db9 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/mailman-2.1.5-5.6.src.rpm df7d92ece2ea37cfb628b258be127b44 SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/mailman-2.1.4-83.13.i586.rpm 9ee909db5738e5a9d2cbe8642b36df2e patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/mailman-2.1.4-83.13.i586.patch.rpm e549d97d81eea96155d2de124c8f2be7 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/mailman-2.1.4-83.13.src.rpm 33964c2c5fe71a65a04e62f12b295775 SUSE Linux 9.0: ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mailman-2.1.2-93.i586.rpm 41b55c17abb0021bd9da56c5684ec0ad patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mailman-2.1.2-93.i586.patch.rpm fc20d3fdfc0463c02809bce81ba46a8c source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/mailman-2.1.2-93.src.rpm 3c6b3c25093c3ccf8d385a7b1e86fdb6 SUSE Linux 8.2: ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mailman-2.1.1-110.i586.rpm b5ee2af05bc7037e6d3e66988b9789b9 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mailman-2.1.1-110.i586.patch.rpm c198e0a9bfb3c7bc828b1f6173834407 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/mailman-2.1.1-110.src.rpm e42568b562cccb8d572b5782a3fa2f09 x86-64 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/mailman-2.1.5-5.6.x86_64.rpm ab82f4faac15b4b0cf635937b1cc2ab5 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/mailman-2.1.5-5.6.x86_64.patch.rpm 074305e1baa53bfe6959293100dc8682 source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/mailman-2.1.5-5.6.src.rpm df7d92ece2ea37cfb628b258be127b44 SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/mailman-2.1.4-83.13.x86_64.rpm ab93f0276b9cc701224eb16c2404a7e9 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/mailman-2.1.4-83.13.x86_64.patch.rpm 8dd9e3317ef89e3e2e8a184c02aacfbc source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/mailman-2.1.4-83.13.src.rpm 62e6d965c15d9795ddcda560a6f2264f SUSE Linux 9.0: ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mailman-2.1.2-93.x86_64.rpm 594f24a7c84defef412b517a4994ee88 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mailman-2.1.2-93.x86_64.patch.rpm 187da073862f34b011bda55894e9b74d source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/mailman-2.1.2-93.src.rpm 0672d542ab787352b9d10b71394ffcfe ______________________________________________________________________________ 5) Pending vulnerabilities in SUSE Distributions and Workarounds: See the SUSE Security Summary report. ______________________________________________________________________________ 6) standard appendix: authenticity verification, additional information - Package authenticity verification: SUSE update packages are available on many mirror ftp servers all over the world. While this service is being considered valuable and important to the free and open source software community, many users wish to be sure about the origin of the package and its content before installing the package. There are two verification methods that can be used independently from each other to prove the authenticity of a downloaded file or rpm package: 1) md5sums as provided in the (cryptographically signed) announcement. 2) using the internal gpg signatures of the rpm package. 1) execute the command md5sum <name-of-the-file.rpm> after you downloaded the file from a SUSE ftp server or its mirrors. Then, compare the resulting md5sum with the one that is listed in the announcement. Since the announcement containing the checksums is cryptographically signed (usually using the key security@suse.de), the checksums show proof of the authenticity of the package. We recommend against subscribing to security lists that cause the e-mail message containing the announcement to be modified so that the signature does not match after transport through the mailing list software. Downsides: You must be able to verify the authenticity of the announcement in the first place. If RPM packages are being rebuilt and a new version of a package is published on the ftp server, all md5 sums for the files are useless. 2) rpm package signatures provide an easy way to verify the authenticity of an rpm package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, where <file.rpm> is the file name of the rpm package that you have downloaded. Of course, package authenticity verification can only target an uninstalled rpm package file. Prerequisites: a) gpg is installed b) The package is signed using a certain key. The public part of this key must be installed by the gpg program in the directory ~/.gnupg/ under the user's home directory who performs the signature verification (usually root). You can import the key that is used by SUSE in rpm packages for SUSE Linux by saving this announcement to a file ("announcement.txt") and running the command (do "su -" to be root): gpg --batch; gpg < announcement.txt | gpg --import SUSE Linux distributions version 7.1 and thereafter install the key "build@suse.de" upon installation or upgrade, provided that the package gpg is installed. The file containing the public key is placed at the top-level directory of the first CD (pubring.gpg) and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de . - SUSE runs two security mailing lists to which any interested party may subscribe: suse-security@suse.com - general/linux/SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an email to <suse-security-subscribe@suse.com>. suse-security-announce@suse.com - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an email to <suse-security-announce-subscribe@suse.com>. For general information or the frequently asked questions (FAQ) send mail to: <suse-security-info@suse.com> or <suse-security-faq@suse.com> respectively. ===================================================================== SUSE's security contact is <security@suse.com> or <security@suse.de>. The <security@suse.de> public key is listed below. ===================================================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, it is desired that the clear-text signature shows proof of the authenticity of the text. SUSE Linux AG makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. 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