SUSE alert: openssl

Posted by dave on Mar 17, 2004 4:47 AM EDT
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The first bug occurs during SSL/TLS handshake in the function do_change_cipher_spec() due to a NULL pointer assignment. The second bug affects openssl version 0.9.7* only with Kerberos cipher-suite enabled and can be triggered during SSL/TLS handshake too.



SUSE Security Announcement

Package: openssl Announcement-ID: SuSE-SA:2004:007 Date: Wednesday, Mar 17th 2004 13:30 MEST Affected products: 8.0, 8.1, 8.2, 9.0 SuSE Linux Database Server, SuSE eMail Server III, 3.1 SuSE Linux Enterprise Server 7, 8 SuSE Linux Firewall on CD/Admin host SuSE Linux Connectivity Server SuSE Linux Office Server Vulnerability Type: remote denial-of-service Severity (1-10): 4 SUSE default package: yes Cross References: CAN-2004-0079 CAN-2004-0112

Content of this advisory: 1) security vulnerability resolved: - null pointer assignment due to handshake - crash with Kerberos cipher-suite support problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - xf86_glx/xmodules/xloader - gnome-session - pwlib - libxml2 - mod_python - mozilla - kernel - mailman - metamail - sysstat 3) standard appendix (further information)


1) problem description, brief discussion, solution, upgrade information

OpenSSL is an implementation of the Secure Socket Layer (SSL v2/3) and Transport Layer Security (TLS v1) protocol. The NISCC informed us about to failure conditions in openssl that can be triggered to crash applications that use the openssl library. The first bug occurs during SSL/TLS handshake in the function do_change_cipher_spec() due to a NULL pointer assignment. The second bug affects openssl version 0.9.7* only with Kerberos cipher-suite enabled and can be triggered during SSL/TLS handshake too.

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.

There is not other solution known to this problem then updating to the current version from our FTP servers.

To make this update effective, restart all servers using openssl please

Intel i386 Platform:

SuSE-9.0: 31ec7dd8d5e119ebc0c63b287e4ad3c7 952ad40732b95ca7fdd8ba00a94ce99b patch rpm(s): 71d9522ca81e5cec829266f5fd9efb6d 40d2d30ff2f2629d02e6e54472b6aca0 source rpm(s): 3bb291108685b06ac25533014ede039e

SuSE-8.2: 21d83138d00c84b0febc2428f1e5ceac 421bf9717ff3c7facc8a6ee51438e82c patch rpm(s): 0457b801931f1f6857e3358c4b5a9151 4d8561d55cde4d31c840ebd7d10901e1 source rpm(s): 4a55e2eae1fd8ebcc086fa612d9af95b

SuSE-8.1: 53c938f88ed6a5d2ad12120c65ea880f bd6ff0ccaf12c1ce9107accf5f4372b6 patch rpm(s): 7782f761018a0b4fb95c955f7c782b6d 51df3d52a98175cbe6338cb963140a59 source rpm(s): da2f5a9f62126ad0e1659a6f4f78878c

SuSE-8.0: f40a9640a6acc1ba9bbd3c2669ecba9d d19730d5050a0f0fd5cafb348c0c0896 patch rpm(s): e81f85173f6108f1e1ce312540fcff48 9fbb35bdf838262ccb56b4c3924c3a08 source rpm(s): 0b09e243d99922087ace4052f330f493


2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- xf86_glx/xmodules/xloader The GLX and DRI code of the Xserver did not verify the "screen" parameter in several functions. This failure leads to a denial-of- service condition and probably to arbitrary code execution as root. New packages are available on our FTP servers.

- gnome-session This updates solves a problem with the initialization of the LD_LIBRARY_PATH while starting GNOME by using /usr/X11R6/bin/gnome. This bug can lead to local privilege escalation. New packages are available on our FTP servers.

- pwlib This update addresses several security vulnerabilities that may be exploited remotely via applications that link with pwlib, like GnomeMeeting or alike. New packages are available on our FTP servers.

- libxml2 A buffer overflow in the URI parsing code is fixed. This bug can lead to remote access to a system using libxml2. New packages are available on our FTP servers.

- mod_python A remote denial-of-service attack can be triggered against the Apache web server by sending a specific query string that is processed by mod_python. New packages are available on our FTP servers.

- mozilla A buffer overflow in the S/MIME code of mozilla has been fixed which could allow remote attackers to execute arbitrary commands as the user running mozilla. Additionally a flaw in cookie handling (CAN-2003-0592) and a cross-site-scripting bug was fixed. In some cases (as with the mozilla package) the complexity of the issue does not allow to add patches any more. By consequence, security related issues in mozilla cannot be addressed. As a service to our user community, we provide packages of newer mozilla versions at These packages have been verified to run fine; they are not located in the update directory of the distribution in question because we cannot make any claims about the compatibility with the other packages in the product

- kernel A new kernel release was made available. This update fixes some minor local denial-of-service attacks. Additionally, the 8.2 versions also includes a missing patch from SuSE-SA:2004:005.

- mailman A remote denial-of-service attack can be triggered in mailman 2.0.x (CAN-2003-0991). New packages will be available soon.

- metamail This update fixes two buffer overflows and two format string bugs that can be exploited remotely in conjunction with other tools to gain access to a system with the privileges of the user running New packages will be available soon.

- sysstat Two cases of insecure temporary file handling were found. The packages are currently being tested and will be available soon. ______________________________________________________________________________

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 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 []), 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 to verify the signature of the package, where 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 "" 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 .

- SUSE runs two security mailing lists to which any interested party may subscribe:

[] - general/linux/SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an email to .

[] - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an email to .

For general information or the frequently asked questions (faq) send mail to: or respectively.

===================================================================== SUSE's security contact is or . The 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.

Type Bits/KeyID Date User ID pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key

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