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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0520 -- FLSA:152835 Updated dhcp package fixes security issue 11 July 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dhcp Publisher: The Fedora Legacy Project Operating System: Red Hat Linux 7.3 Linux variants Impact: Execute Arbitrary Code/Commands Denial of Service Access: Remote/Unauthenticated CVE Names: CAN-2004-1006 Ref: ESB-2005.0303 - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Fedora Legacy Update Advisory Synopsis: Updated dhcp package fixes security issue Advisory ID: FLSA:152835 Issue date: 2005-07-10 Product: Red Hat Linux Keywords: Bugfix CVE Names: CAN-2004-1006 - --------------------------------------------------------------------- - --------------------------------------------------------------------- 1. Topic: Updated dhcp packages that fix a security issue are now available. dhcp is a DHCP (Dynamic Host Configuration Protocol) server and relay agent. 2. Relevant releases/architectures: Red Hat Linux 7.3 - i386 3. Problem description: "infamous41md" noticed that the log functions in dhcp 2.x pass parameters to a function that uses format strings. One use seems to be exploitable in connection with a malicious DNS server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-1006 to this issue. Users of dhcp are advised to upgrade to this errata package, which contains backported patches correcting this issue. 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 yum and apt. Many people find this an easier way to apply updates. To use yum issue: yum update or to use apt: apt-get update; apt-get upgrade This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www.fedoralegacy.org/docs for directions on how to configure yum and apt-get. 5. Bug IDs fixed: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=152835 6. RPMs required: Red Hat Linux 7.3: SRPM: http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/dhcp-2.0pl5-8.2.legacy.src.rpm i386: http://download.fedoralegacy.org/redhat/7.3/updates/i386/dhcp-2.0pl5-8.2.legacy.i386.rpm 7. Verification: SHA1 sum Package Name - --------------------------------------------------------------------- e134b4118edc63c20b1227d3b199edf55e9c6411 redhat/7.3/updates/i386/dhcp-2.0pl5-8.2.legacy.i386.rpm 873fe4bb121b857436cc044cf379597f78bc0e4b redhat/7.3/updates/SRPMS/dhcp-2.0pl5-8.2.legacy.src.rpm These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the sha1sum with the following command: sha1sum <filename> 8. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1006 9. Contact: The Fedora Legacy security contact is <secnotice@fedoralegacy.org>. More project details at http://www.fedoralegacy.org - --------------------------------------------------------------------- - --------------------------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. NOTE: Third Party Rights 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 follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. 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 author's website 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/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 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 only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBQtHRgCh9+71yA2DNAQLCKgP/U+lpNpnzOLMBP3A2dpdFjNLEEcrx6yz8 Rv7G+7hGEq3bx4Zw+OKmFb5V73wi4one1DsiHObxw2r2STywy7xJA7WIThktQ2Cn kBfYpmroiMLcRn4TCXxR58YNEQL+Mi4+5fCiQkaCGH5rRKy55j3wbRbIZfjWeWI6 Gmw/zvdE7Eo= =qVVd -----END PGP SIGNATURE-----