-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 +------------------------------------------------------------------------+ | EnGarde Secure Linux Security Advisory March 01, 2002 | | http://www.engardelinux.org/ ESA-20020301-005 | | | | Package: apache (mod_ssl) | | Summary: mod_ssl's session caching mechanisms contain a potential | | buffer overflow | +------------------------------------------------------------------------+ EnGarde Secure Linux is a secure distribution of Linux that features improved access control, host and network intrusion detection, Web based secure remote management, complete e-commerce using AllCommerce, and integrated open source security tools. OVERVIEW - -------- There is a buffer overflow in mod_ssl, part of EnGarde's apache package, which an attacker may potentially trigger by sending a very long client certificate. DETAIL - ------ mod_ssl is an apache module used to provide SSL functionality using the OpenSSL toolkit. Ed Moyle has discovered a buffer overflow in mod_ssl's session caching mechanisms using dbm and shared memory. We would like to stress that this vulnerability is in mod_ssl, not in apache. We are issuing an apache update because we include mod_ssl as part of our apache package. SOLUTION - -------- All users should upgrade to the most recent version as outlined in this advisory. Guardian Digital recently made available the Guardian Digital Secure Update, a means to proactively keep systems secure and manage system software. EnGarde users can automatically update their system using the Guardian Digital WebTool secure interface. If choosing to manually upgrade this package, updates can be obtained from: ftp://ftp.engardelinux.org/pub/engarde/stable/updates/ http://ftp.engardelinux.org/pub/engarde/stable/updates/ Before upgrading the package, the machine must either: a) be booted into a "standard" kernel; or b) have LIDS disabled. To disable LIDS, execute the command: # /sbin/lidsadm -S -- -LIDS_GLOBAL To install the updated package, execute the command: # rpm -Uvh <filename> You must now update the LIDS configuration by executing the command: # /usr/sbin/config_lids.pl To re-enable LIDS (if it was disabled), execute the command: # /sbin/lidsadm -S -- +LIDS_GLOBAL To verify the signatures of the updated packages, execute the command: # rpm -Kv <filename> UPDATED PACKAGES - ---------------- These updated packages are for EnGarde Secure Linux 1.0.1 (Finestra). Source Packages: SRPMS/apache-1.3.23-1.0.27.src.rpm MD5 Sum: 412c8ed8f0151dc023372b70aac0475c Binary Packages: i386/apache-1.3.23-1.0.27.i386.rpm MD5 Sum: 66b23a6224b1916983c4350e95c35fd6 i686/apache-1.3.23-1.0.27.i686.rpm MD5 Sum: 4dc0650fb82a15aa00927cabcb02b230 REFERENCES - ---------- Guardian Digital's public key: http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY Credit for the discovery of this bug goes to: Ed Moyle <emoyleat_private> mod_ssl's Official Web Site: http://www.modssl.org/ Security Contact: securityat_private EnGarde Advisories: http://www.engardelinux.org/advisories.html - -------------------------------------------------------------------------- $Id: ESA-20020301-005-apache,v 1.3 2002/03/01 05:24:50 rwm Exp $ - -------------------------------------------------------------------------- Author: Ryan W. Maple, <ryanat_private> Copyright 2002, Guardian Digital, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE8fxtOHD5cqd57fu0RAs4YAJwI63Bvsu3ovXom2fpYe3uUVwaQhQCcDmhE mkmxGGvF3L1LAN+eT5D8uU0= =dudS -----END PGP SIGNATURE-----
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