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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.352 -- RHSA-2002:134-12 Updated mod_ssl packages available 18 July 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: mod_ssl Vendor: Red Hat Operating System: Red Hat Linux 7.3 Red Hat Linux 7.2 Red Hat Linux 7.1 Red Hat Linux 7.0 Platform: IA-64 Alpha i386 Impact: Execute Arbitrary Code/Commands Access Required: Remote Ref: ESB-2002.119 - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated mod_ssl packages available Advisory ID: RHSA-2002:134-12 Issue date: 2002-07-01 Updated on: 2002-07-16 Product: Red Hat Linux Keywords: mod_ssl overflow Cross references: RHSA-2002:135 RHSA-2002:136 Obsoletes: RHSA-2002:041 CVE Names: CAN-2002-0653 - --------------------------------------------------------------------- 1. Topic: Updated mod_ssl packages are now available for Red Hat Linux 7, 7.1, 7.2, and 7.3. These updates incorporate a fix for an incorrect bounds check in versions of mod_ssl up to and including version 2.8.9. 2. Relevant releases/architectures: Red Hat Linux 7.0 - alpha, i386 Red Hat Linux 7.1 - alpha, i386, ia64 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 3. Problem description: The mod_ssl module provides strong cryptography for the Apache Web server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols. Versions of mod_ssl prior to 2.8.10 are subject to a single NULL overflow that can cause arbitrary code execution. In order to exploit this vulnerability, the Apache Web server has to be configured to allow overriding of configuration settings on a per-directory basis, and untrusted local users must be able to modify a directory in which the server is configured to allow overriding. The local attacker may then become the user that Apache is running as (usually 'www' or 'nobody'). Note that regardless of this bug, local users can obtain the same privileges if the server is configured to allow them to create CGI scripts which run as the Web server user, or if PHP is enabled but not configured in "safe mode". The errata packages contain versions of mod_ssl that have been patched and are not vulnerable to this issue. Please note that you must restart the httpd daemon to use the updated module. For instructions on doing this, see the bottom of the Solutions section below. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. After the appropriate updates have been applied, it will be necessary to manually restart the server with the following command: /sbin/service httpd restart 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 6. RPMs required: Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/mod_ssl-2.8.5-5.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/mod_ssl-2.8.5-5.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/mod_ssl-2.8.5-5.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/mod_ssl-2.8.5-5.src.rpm alpha: ftp://updates.redhat.com/7.1/en/os/alpha/mod_ssl-2.8.5-5.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/mod_ssl-2.8.5-5.i386.rpm ia64: ftp://updates.redhat.com/7.1/en/os/ia64/mod_ssl-2.8.5-5.ia64.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/mod_ssl-2.8.5-6.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/mod_ssl-2.8.5-6.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/mod_ssl-2.8.5-6.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/mod_ssl-2.8.7-6.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/mod_ssl-2.8.7-6.i386.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- 68f324107e24931fbd3c13fd7f0a4f66 7.0/en/os/SRPMS/mod_ssl-2.8.5-5.src.rpm 5505cb06688d8d669a927dc5a29d0bac 7.0/en/os/alpha/mod_ssl-2.8.5-5.alpha.rpm 2fdd482796a973447d19e01cf8a11603 7.0/en/os/i386/mod_ssl-2.8.5-5.i386.rpm 68f324107e24931fbd3c13fd7f0a4f66 7.1/en/os/SRPMS/mod_ssl-2.8.5-5.src.rpm 5505cb06688d8d669a927dc5a29d0bac 7.1/en/os/alpha/mod_ssl-2.8.5-5.alpha.rpm 2fdd482796a973447d19e01cf8a11603 7.1/en/os/i386/mod_ssl-2.8.5-5.i386.rpm 9a0d26822a4055ccf1433d92c0c565a2 7.1/en/os/ia64/mod_ssl-2.8.5-5.ia64.rpm 39e695b50d1a2496cad55cf396ea5d88 7.2/en/os/SRPMS/mod_ssl-2.8.5-6.src.rpm 4a18209d091f3c8bbc2edc21ddbc0ae8 7.2/en/os/i386/mod_ssl-2.8.5-6.i386.rpm 56781cdd2dc2ca137aabe23d587ce783 7.2/en/os/ia64/mod_ssl-2.8.5-6.ia64.rpm f7388246313fc23b83228361671fa8ff 7.3/en/os/SRPMS/mod_ssl-2.8.7-6.src.rpm 8c9e4f55866bd16df07bc945766bc680 7.3/en/os/i386/mod_ssl-2.8.7-6.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 <filename> 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 <filename> 8. References: http://marc.theaimsgroup.com/?l=apache-modssl&m=102491918531562 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0653 Copyright(c) 2000, 2001, 2002 Red Hat, Inc. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBPTbqIyh9+71yA2DNAQGNYwP8D9bS9AvzcznGVrcI73bc3fW451rPQXxt qIIOPMhsFrgurMGGweWO7CwrNZr8m9eDstvVwrobNoQBKheeY/McEYTz2RvQrwY2 kKEdyAEICAM9k96hI1rZsWv1SqNf3Hu8LkXyEfcFDiYg7VmwbPgW/L+zuWCqaomg trbvKoctks4= =ml4l -----END PGP SIGNATURE-----