From bugzilla@redhat.com Wed Mar 13 16:12:22 2002 From: bugzilla@redhat.com To: redhat-watch-list@redhat.com Cc: bugtraq@securityfocus.com, linux-security@redhat.com, security@redhat.com Date: Wed, 13 Mar 2002 11:32 -0500 Subject: [RHSA-2002:042-12] Updated secureweb packages available [The following text is in the "iso-8859-1" character set] [Your display is set for the "US-ASCII" character set] [Some characters may be displayed incorrectly] --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated secureweb packages available Advisory ID: RHSA-2002:042-12 Issue date: 2002-03-04 Updated on: 2002-03-13 Product: Red Hat Secure Web Server Keywords: mod_ssl buffer overflow session cache Cross references: RHSA-2002:041 Obsoletes: --------------------------------------------------------------------- 1. Topic: Updated secureweb packages are now available for Red Hat Secure Web Server 3.2 (U.S.). These updates close a buffer overflow in mod_ssl. 2. Relevant releases/architectures: Red Hat Secure Web Server 3.2 - i386 3. Problem description: When session caching is enabled, mod_ssl will serialize SSL session variables to store them for later use. Unpatched versions of mod_ssl prior to version 2.8.7 using the 'shm' or 'dbm' session caches would do so using a buffer with a fixed size, making it vulnerable to overflow. To exploit the overflow, the server must be configured to require client certificates, and an attacker must obtain a carefully crafted client certificate that has been signed by a Certificate Authority which is trusted by the server. If these conditions are met, it is possible for an attacker to execute arbitrary code on the server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0082 to this issue. Pay special attention to the installation instructions in the "Solution" section below as they differ from standarad upgrade instructions. 4. Solution: Some of these files are distributed in rhmask format and may only be used by individuals who have purchased Red Hat Linux 6.2 Professional. To produce installable RPM files from the rhmask files, retrieve the rhmask files via ftp and type the following command: rhmask secureweb-3.2-12.i386.rpm secureweb-3.2.5-1.i386.rpm.rhmask The original RPM is located only on your Secure Web Server CD, and cannot be obtained via the Internet. Note: if you do not have the original RPM located in the same directory as the rhmask file, you will need to prefix the name of the RPM with the full path name to its location (for example on your installation CD). For each RPM for your particular architecture, run: rpm -Fvh [filename] where [filename] is the name of the RPM package. To restart your Secure Web Server, type the following command in a shell prompt as root: /etc/rc.d/init.d/httpsd restart 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 6. RPMs required: Red Hat Secure Web Server 3.2: SRPMS: ftp://updates.redhat.com/3.2/other_prod/secureweb/SRPMS/secureweb-3.2.5-3.nosrc.rpm i386: ftp://updates.redhat.com/3.2/other_prod/secureweb/i386/secureweb-3.2.5-3.i386.rpm.rhmask ftp://updates.redhat.com/3.2/other_prod/secureweb/i386/secureweb-devel-3.2.5-3.i386.rpm ftp://updates.redhat.com/3.2/other_prod/secureweb/i386/secureweb-manual-3.2.5-3.i386.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- df95f1339f71af47d70ca965a9fe11cc 3.2/other_prod/secureweb/SRPMS/secureweb-3.2.5-3.nosrc.rpm de9d5943625415a7492a2f5ad1165f37 3.2/other_prod/secureweb/i386/secureweb-3.2.5-3.i386.rpm.rhmask 1b39d3833a18b2c2b4b30f8d5ed88283 3.2/other_prod/secureweb/i386/secureweb-devel-3.2.5-3.i386.rpm 3ce2a02339fe3caf436a9eb2e1154f70 3.2/other_prod/secureweb/i386/secureweb-manual-3.2.5-3.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg 8. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0082 http://marc.theaimsgroup.com/?l=apache-modssl&m=101449247201254 http://online.securityfocus.com/archive/1/258646 Copyright(c) 2000, 2001, 2002 Red Hat, Inc.