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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.505 -- RHSA-2001:156-05 Updated postfix packages are available 29 November 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: postfix Vendor: Red Hat Operating System: Red Hat Powertools 7.1 Platform: Alpha i386 Impact: Denial of Service Access Required: Remote - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated postfix packages are available Advisory ID: RHSA-2001:156-05 Issue date: 2001-11-15 Updated on: 2001-11-27 Product: Red Hat Powertools Keywords: postfix session log memory exhaustion denial of service Cross references: Obsoletes: - --------------------------------------------------------------------- 1. Topic: Updated postfix packages are now availble that will fix a possible denial of service attack. 2. Relevant releases/architectures: Red Hat Powertools 7.1 - alpha, i386 3. Problem description: A malicious user could get postfix to exhaust a machine's memory by abusing its session cache which could result in a denial of service attack. The updated postfix packages will fix these potential problems. 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. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 6. RPMs required: Red Hat Powertools 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/powertools/SRPMS/postfix-20011125-1SASL.src.rpm alpha: ftp://updates.redhat.com/7.1/en/powertools/alpha/postfix-20011125-1SASL.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/powertools/i386/postfix-20011125-1SASL.i386.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- 3f226c17cd8a8955826c3aced3f77947 7.1/en/powertools/SRPMS/postfix-20011125-1SASL.src.rpm ba0706ce0d6e6c453a8e1afcab248eac 7.1/en/powertools/alpha/postfix-20011125-1SASL.alpha.rpm 60402b08bd489052146eec437838a829 7.1/en/powertools/i386/postfix-20011125-1SASL.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: Copyright(c) 2000, 2001 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. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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 emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBPAZPZyh9+71yA2DNAQH85wP+M51jRg/F8WTXcY3cIODEYlIsRVgUsImx BTulIPXdgVcAc3FCz9kv/rAufgYT0MipZvtgtoBVtHf6K8Scc9psrgGuxRcwnQDA tZ5sJtba8wPWm177EWAmvOC0WP4kF1k5iIscES/O54uhs5e4xg5Zu7ZWjaaeAKQY USXTEZNA4iA= =6qxw -----END PGP SIGNATURE-----