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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2000.363 -- RHSA-2000:111-03 Updated openssh packages available for Red Hat Linux 7 22 November 2000 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssh Vendor: Red Hat Operating System: Red Hat Linux 7 Platform: i386 Impact: Inappropriate Access Access Required: Remote - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated openssh packages available for Red Hat Linux 7 Advisory ID: RHSA-2000:111-03 Issue date: 2000-11-20 Updated on: 2000-11-21 Product: Red Hat Linux Keywords: openssh malicious server port forwarding Cross references: N/A - --------------------------------------------------------------------- 1. Topic: Updated openssh packages are now available for Red Hat Linux 7. 2. Relevant releases/architectures: Red Hat Linux 7.0 - i386 Red Hat Linux 7.0J - i386 3. Problem description: An OpenSSH client will do agent or X11 forwarding at the request of a server, even if the user has not requested that it be done. A malicious server can exploit this vulnerability to gain access to the user's display. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 18598 - ssh-keygen -l does not work for dsa keys 20805 - Hostile servers can force OpenSSH clients to do agent or X11 forwarding 20884 - openssh-2.3.0p1 doesn't include /etc/ssh/primes 6. RPMs required: Red Hat Linux 7.0: i386: ftp://updates.redhat.com/7.0/i386/openssh-2.3.0p1-4.i386.rpm ftp://updates.redhat.com/7.0/i386/openssh-clients-2.3.0p1-4.i386.rpm ftp://updates.redhat.com/7.0/i386/openssh-server-2.3.0p1-4.i386.rpm ftp://updates.redhat.com/7.0/i386/openssh-askpass-2.3.0p1-4.i386.rpm ftp://updates.redhat.com/7.0/i386/openssh-askpass-gnome-2.3.0p1-4.i386.rpm sources: ftp://updates.redhat.com/7.0/SRPMS/openssh-2.3.0p1-4.src.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- d564b593cce6c1afaa02a11004ef6cf7 7.0/SRPMS/openssh-2.3.0p1-4.src.rpm 973c033bd3cf3e3641f7fb9d172baf5a 7.0/i386/openssh-2.3.0p1-4.i386.rpm ead1cc84519f5a6fa0233ce8d3237457 7.0/i386/openssh-askpass-2.3.0p1-4.i386.rpm d426ff6c55181f8ccbea6e2f7a307b99 7.0/i386/openssh-askpass-gnome-2.3.0p1-4.i386.rpm 51fe082e6830e461a900000e2884cb14 7.0/i386/openssh-clients-2.3.0p1-4.i386.rpm dd9bb3271403162202599d3cd8b9a22e 7.0/i386/openssh-server-2.3.0p1-4.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/corp/contact.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://www.openbsd.org/errata27.html#sshforwarding Copyright(c) 2000 Red Hat, Inc. - --------------------------END INCLUDED TEXT-------------------- 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 iQCVAwUBOlSNTCh9+71yA2DNAQE+ygP/XfMBjqRvJZ6GU43y4K2j+eeZdqIfJGTC 9zqh+fSQCitM2a1Zw/aNgnOf/ppujBDAW+ka8RFPPn67ggjWQoBZgPJ7G+HP52Dc Z2mYWlnq+OxlJBC8gPp7CDxzvkmUxpwAexcr3eK+i84mLmy3hgMHFJUY0HUe8O6O 3WC2aVl2GnE= =hEk/ -----END PGP SIGNATURE-----