-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: ethereal Announcement-ID: SuSE-SA:2003:019 Date: Friday, Mar 21th 2003 10:12 MET Affected products: 7.1, 7.2, 7.3, 8.0, 8.1 SuSE Linux Database Server, SuSE eMail Server III, 3.1 SuSE Linux Enterprise Server 7, SuSE Linux Firewall on CD/Admin host SuSE Linux Connectivity Server SuSE Linux Office Server Vulnerability Type: local privilege escalation Severity (1-10): 3 SuSE default package: yes Cross References: CAN-2003-0081 Content of this advisory: 1) security vulnerability resolved: - buffer overlfow - format string bug problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - mutt - kernel - apcupsd - vnc - openssl - mod_php4 - pgp4pine - nethack - netpbm - man 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information Ethereal is a GUI for analyzing and displaying network traffic. Ethereal is vulnerable to a format string bug in it's SOCKS code and to a heap buffer overflow in it's NTLMSSP code. These bugs can be abused to crash ethereal or maybe to execute arbitrary code on the machine running ethereal. There is no temporary workaround known. Please 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 to install from the maintenance web. Please note, missing packages will be published as soon as possible. Intel i386 Platform: SuSE-8.1: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/ethereal-0.9.6-152.i586.rpm 1ea03e4f888f30bc37669ea4dd0cfe30 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/ethereal-0.9.6-152.i586.patch.rpm 317046452887bdb6d9bc3882909540f1 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/ethereal-0.9.6-152.src.rpm 831fd8c3f888a7bf832422aa58a5ea35 SuSE-8.0: ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/ethereal-0.9.6-153.i386.rpm 3e4762aa5dabfce6dc8bce77ff623d7f patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/ethereal-0.9.6-153.i386.patch.rpm 9404cb917fb1ab56a59746d1c12a9c81 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/ethereal-0.9.6-153.src.rpm 1846c9dfe0ba59e99966a63d3ba0e645 SuSE-7.3: ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/ethereal-0.9.6-154.i386.rpm e9f55cdf8d89f0dee322f5829908d3d9 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/ethereal-0.9.6-154.src.rpm 57f1589a18d614afa17a0f779625adff SuSE-7.2: ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/ethereal-0.9.6-155.i386.rpm c7362031d0082b097d50bed249e170bf source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/ethereal-0.9.6-155.src.rpm 39b2f8a42575f42c9f68d7d8b8b41cd7 SuSE-7.1: ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/ethereal-0.9.6-156.i386.rpm b6a7c65cc20e0bb901bf1599ff107e6a source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/ethereal-0.9.6-156.src.rpm b650101ce46e7f8050c674cfb275cfe6 Sparc Platform: SuSE-7.3: ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/ethereal-0.9.6-57.sparc.rpm e979f24ce5292a2a698f752d67bfa916 source rpm(s): ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/ethereal-0.9.6-57.src.rpm 32504bc48c8e6771ff6285c59668d282 AXP Alpha Platform: SuSE-7.1: ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/ethereal-0.9.6-80.alpha.rpm 111e039aafef5669863b6d502392d115 source rpm(s): ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/ethereal-0.9.6-80.src.rpm 2373bb476bb8bea7667e9621411fbc0f PPC Power PC Platform: SuSE-7.3: ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/ethereal-0.9.6-90.ppc.rpm ab58afaae72d603941de12ad97baba39 source rpm(s): ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/ethereal-0.9.6-90.src.rpm ba0fbd761194112f0a09c8422f54a25b SuSE-7.1: ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/ethereal-0.9.6-92.ppc.rpm dbad6f03abc69882ce47a78360cde7fa source rpm(s): ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/ethereal-0.9.6-92.src.rpm 05517631f384f6244d26a5dc3bb4a3c7 ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - mutt A buffer overflow in mutt's IMAP code may result in remote system compromise. New packages are currently being build and will be available soon. - kernel A bug in the Linux kernel was found that allows local users to become root. The bug can just be exploited if ptrace(2) is allowed, LKM and kmod support is enabled. We already build new kernels and are currently testing them. As a workaround kernel module loading can be disabled after every boot by executing the following action as root: # echo /just/a/temporary/workaround > /proc/sys/kernel/modprobe Please note, that this will disable some services. - apcupsd The control and management daemon for APC UPS systems is vulnerable to remote code execution due to buffer overflow and format string bugs. A dedicated advisory for this issue will be released as soon as all packages are being build. - vnc VNC (Virtual Network Computing) uses a weak cookie generation process which can be exploited by an attacker to bypass authentication. New packages are currently being tested and will be available on our FTP servers soon. - openssl A paper regarding remote timing attacks against OpenSSL has been published by researchers of the Stanford University. It is possible to extract the private RSA key used by services using OpenSSL by observing their timing behavior. Additionally czech researchers found another bug in OpenSSL which is an extension of the "Bleichenbacher Attack". Fixed packages will be available on our FTP servers soon. - mod_php4 4.3.0 A serious security vulnerability was found in mod_php 4.3.0 which allows a remote attacker to read files or even execute PHP-code. This was possible due to direct access to the CGI module. SuSE does not ship this vulnerable version. - pgp4pine A buffer overflow in pine's filter add-on pgp4pine can be abused to execute arbitrary commands remotely. The pgp4pine version SuSE ships is not vulnerable to this bug. - nethack A buffer overflow in nethack can be exploited local users to gain higher privileges if the nethack binary is installed setuid/setgid. This bug is fixed for upcoming SuSE Linux versions. As a temporary workaround you should disable all s-bits on the nethack binary (/etc/permissions.local). - netpbm The netpbm package contains various integer overflows which can lead to arbitrary code execution. New packages are published on our FTP servers. - man A vulnerability in man was published that allows local privilege escalation. SuSE Linux does not ship this vulnerable version of man. ______________________________________________________________________________ 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@suse.de), the checksums show proof of the authenticity of the package. We disrecommend to subscribe to security lists which cause the email 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 filename of the rpm package that you have downloaded. Of course, package authenticity verification can only target an un-installed 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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