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February 2005

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SUSE Security Summary Report SUSE-SR:2005:003
by Marcus Meissner 04 Feb '05

04 Feb '05

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Summary Report Announcement-ID: SUSE-SR:2005:003 Date: Wednesday, Feb 4th 2005 15:00 MEST Cross References: CAN-2005-0064 CAN-2004-1125 CAN-2004-1268 CAN-2004-1267 CAN-2004-1029 CAN-2004-1145 CAN-2004-1158 CAN-2004-1147 CAN-2004-1148 PMASA-2004-4 CAN-2004-1055 PMASA-2004-3 CAN-2005-0133 CAN-2005-0013 CAN-2005-0014 CAN-2005-0005 CAN-2004-1182 CAN-2005-0094 CAN-2005-0095 CAN-2005-0096 CAN-2005-0097 CAN-2005-0175 CAN-2005-0174 CAN-2005-0173 CAN-2004-1004 CAN-2004-1005 CAN-2004-1009 CAN-2004-1090 CAN-2004-1091 CAN-2004-1092 CAN-2004-1093 CAN-2004-1174 CAN-2004-1175 CAN-2004-1176 CAN-2004-1139 CAN-2004-1140 CAN-2004-1141 CAN-2004-1142 CAN-2005-0006 CAN-2005-0007 CAN-2005-0008 CAN-2005-0009 CAN-2005-0010 CAN-2005-0084 CAN-2005-0102 Content of this advisory: 1) solved security vulnerabilities: - mailman missing dependency - several security problems in CUPS - Java Plugin security problems - Several KDE vulnerabilities - various phpMyAdmin problems - clamav denial of service attack - libXPM bug fixes - various ncpfs problems - ImageMagick buffer overflows - hylafax authentication problems - postfix 64 bit and IPv6 related problems - samba bug fix release - various Squid denial of service problems - multiple mc problems - htdig cross site scripting problem - xntp problems with IPv6 - various ethereal protocol decoder problems - buffer overflow in evolution helper app 2) pending vulnerabilities, solutions, workarounds: - None. 3) standard appendix (further information) ______________________________________________________________________________ 1) solved security vulnerabilities To avoid spamming lists with advisories for every small incident, we will release weekly summary advisories for issues where we have released updates without a full advisory. Since these are minor issues, md5sums and ftp URLs are not included. Fixed packages for the following incidents are already available on our FTP server and via the YaST Online Update. - mailman missing dependency The mailman update from last week introduced new code into the mailman python code. This code requires python classes from the python-xml package. Please make sure you have the python-xml RPM installed if you are using mailman. - several security problems in CUPS Several problems in the print system CUPS have been fixed: - xpdf buffer overflows in included pdftops filter program. Mitre CVE IDs: CAN-2005-0064 and CAN-2004-1125. - buffer overflow in hpgltops filter program found by djb students. Mitre CVE ID: CAN-2004-1267 - lppasswd denial of service attack found by djb students. Mitre CVE ID: CAN-2004-1268 All SUSE Linux based products are affected. - multiple Mozilla vulnerabilities Lots of Mozilla problems have been fixed in the Mozilla and Mozilla Firefox packages. All currently known security bug fixes from the Mozilla release branches were merged into our Mozilla RPMs. All SUSE Linux based products are affected. - Java Plugin security problems A privilege escalation problem was found in the Sun Java Plugin which could have a remote attacker reading and writing files of a local user browsing websites. This is tracked by the Mitre CVE ID CAN-2004-1029. This bug affects all SUSE versions on the Intel x86 and AMD64 / Intel Extended Memory Architecture (EM64T) platforms. - Several KDE vulnerabilities Several vulnerabilities were identified and fixed within KDE: - Java Plugin security problems similar to the Sun Java Plugin security problems were identified and fixed. Mitre CVE ID: CAN-2004-1145 - A FTP command injection problem was identified and fixed. - Window injection vulnerabilities were identified and fixed. Mitre CVE ID: CAN-2004-1158 - SMB link URLs could contain the passwords of the shares. All SUSE Linux based products are affected. - various phpMyAdmin problems Several problems were found within phpMyAdmin: - with PHP safe mode off and external transformations enabled an attacker could execute arbitrary commands (CAN-2004-1147, PMASA-2004-4). This only affects SUSE Linux version starting with 9.0. - With PHP safe mode off an attacker could read arbitrary files (CAN-2004-1148, PMASA-2004-4). SUSE Linux versions starting with 8.2 are affected. - multiple cross site scripting bugs (CAN-2004-1055, PMASA-2004-3) All SUSE Linux versions are affected. - clamav denial of service attack Our system administrators spotted a rogue ZIP file that caused clamav to crash by a division by zero. This problem was fixed and is tracked by the Mitre CVE CAN-2005-0133. A further upstream clamav update is currently in progress. - libXPM bug fixes Earlier versions of the bug fix for libXPM buffer overflows had problems when saving XPM files to absolute pathnames for instance via GIMP. This problem was fixed and affected all SUSE Linux based products. - various ncpfs problems Erik Sjølund of Debian discovered various ncpfs security problems which could lead to a local attacker gaining root privileges. These are tracked by the Mitre CVE IDs CAN-2005-0013 and CAN-2005-0014. All SUSE Linux based products were affected. - ImageMagick buffer overflows ImageMagick contained buffer overflows in the PSD (Photoshop Document) decoding routines. This is tracked by the Mitre CVE ID CAN-2005-0005. All SUSE Linux based products are affected. - hylafax authentication problems Lee Howard found a bug in the authentication code of hfaxd that allowed attackers to gain unauthorized access to the fax system by guessing the content of the hosts.hfaxd file. This is tracked by the Mitre CVE ID CAN-2004-1182. All SUSE Linux based products are affected. - postfix 64 bit and IPv6 related problems - When postfix runs chrooted without /proc mounted and has the permit_mx_backup option set, it would relay mails to any MX hosts with AAAA (IPv6) DNS records. This was found and reported by Peer Heinlein. - When setting "debug_peer_list" to a non-empty value and using lmtp delivery via unix domain sockets, the postfix lmtp process will segfault. This bug is only valid on 64bit platforms: - Postfix components can segfault because of non-portable reuse of variadic argument lists. All SUSE Linux based products are affected. - samba bug fix release The previous Samba security update contained a bug which could lead to the smbd crashing on startup. All SUSE Linux based products are affected. - various Squid denial of service problems Various denial of service and potential buffer overflow problems were found in the web proxy Squid: - Mitre CVE ID CAN-2005-0094 "infamous41md" discovered a buffer overflow in the parser for Gopher responses which will lead to memory corruption and usually crash Squid. - Mitre CVE ID CAN-2005-0095 "infamous41md" discovered an integer overflow in the receiver of WCCP (Web Cache Communication Protocol) messages. An attacker could send a specially crafted UDP datagram that will cause Squid to crash. - Mitre CVE ID CAN-2005-0096 Memory leak in the NTLM fakeauth_auth helper for Squid 2.5.STABLE7 and earlier allows remote attackers to cause a denial of service by memory consumption. - Mitre CVE ID CAN-2005-0097 The NTLM component in Squid 2.5.STABLE7 and earlier allows remote attackers to cause a denial of service (crash) via a malformed NTLM type 3 message. - Mitre CVE ID CAN-2005-0175 and CAN-2005-0174. Minor problems in the HTTP header parsing code were fixed. - CAN-2005-0173 LDAP is very forgiving about spaces in search filters and this could be abused to log in using several variants of the login name, possibly bypassing explicit access controls or confusing accounting. - multiple mc problems Several bug fixes were applied to the source by upstream developers of the console file browser mc that are security relevant. - CAN-2004-1004 Multiple format string vulnerabilities - CAN-2004-1005 Multiple buffer overflows - CAN-2004-1009 One infinite loop vulnerability - CAN-2004-1090 Denial of service via corrupted section header - CAN-2004-1091 Denial of service via null dereference - CAN-2004-1092 Freeing unallocated memory - CAN-2004-1093 Denial of service via use of already freed memory - CAN-2004-1174 Denial of service via manipulating non-existing file handles - CAN-2004-1175 Unintended program execution via insecure filename quoting. - CAN-2004-1176 Denial of service via a buffer underflow All SUSE Linux based products are affected. - xntp problems with IPv6 The xntpd crashes when accessing NTP hosts with IPv6 addresses. This affects all SUSE linux based platforms. - various ethereal protocol decoder problems Various network protocol decoder problems were fixed in ethereal which could lead to crashes or remote attackers executing code. List of Mitre CVE Ids: CAN-2004-1139,CAN-2004-1140,CAN-2004-1141, CAN-2004-1142, CAN-2005-0006, CAN-2005-0007, CAN-2005-0008, CAN-2005-0009, CAN-2005-0010, CAN-2005-0084. All SUSE linux based products are affected. - buffer overflow in evolution helper app A buffer overflow in a evolution helper app could lead to a remote attacker executing code as the mail retrieving user. This is tracked by the Mitre CVE ID CAN-2005-0102. All SUSE Linux based products are affected. - Path traversal problem in SLOX A path traversal problem in SLOX was reported to us by Gerrit Wyen and Thorsten Reinsch. Fixed packages have been released. This affects the SUSE Linux Open Exchange server product. ______________________________________________________________________________ 2) Pending vulnerabilities in SUSE Distributions and Workarounds: - No critical vulnerabilities. ______________________________________________________________________________ 3) 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(a)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(a)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(a)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(a)suse.com>. suse-security-announce(a)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(a)suse.com>. For general information or the frequently asked questions (FAQ) send mail to: <suse-security-info(a)suse.com> or <suse-security-faq(a)suse.com> respectively. ===================================================================== SUSE's security contact is <security(a)suse.com> or <security(a)suse.de>. The <security(a)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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