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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.314 -- RHSA-2002:127-18 Updated OpenSSH packages fix various security issues 28 June 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenSSH Vendor: Red Hat Operating System: Red Hat Linux 7.0 Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Platform: Alpha IA-64 i386 Impact: Execute Arbitrary Code/Commands Access Required: Remote Ref: AL-2002.05 AA-2002.05 - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated OpenSSH packages fix various security issues Advisory ID: RHSA-2002:127-18 Issue date: 2002-06-24 Updated on: 2002-06-27 Product: Red Hat Linux Keywords: security pam openssh ChallengeResponseAuthentication Cross references: Obsoletes: RHSA-2002:043 - --------------------------------------------------------------------- 1. Topic: Updated openssh packages are now available for Red Hat Linux 7, 7.1, 7.2, and 7.3. These updates fix an input validation error in OpenSSH. 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: OpenSSH provides an implementation of the SSH (secure shell) protocol used for logging into and executing commands on remote machines. Versions of the OpenSSH server between 2.3.1 and 3.3 contain an input validation error that can result in an integer overflow and privilege escalation. At this time, Red Hat does not believe that the default installation of OpenSSH on Red Hat Linux is vulnerable to this issue; however a user would be vulnerable if the configuration option "PAMAuthenticationViaKbdInt" is enabled in the sshd configuration file (it is not enabled by default). We have applied the security fix provided by the OpenSSH team to these errata packages which are based on OpenSSH 3.1p1. This should minimize the impact of upgrading to our errata packages. All users of OpenSSH should update to these errata packages which are not vulnerable to 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 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 Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/openssh-3.1p1-5.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/openssh-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/openssh-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/openssh-clients-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/openssh-server-3.1p1-5.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/openssh-3.1p1-5.src.rpm alpha: ftp://updates.redhat.com/7.1/en/os/alpha/openssh-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.1/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.1/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.1/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm ftp://updates.redhat.com/7.1/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/openssh-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.1/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.1/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.1/en/os/i386/openssh-clients-3.1p1-5.i386.rpm ftp://updates.redhat.com/7.1/en/os/i386/openssh-server-3.1p1-5.i386.rpm ia64: ftp://updates.redhat.com/7.1/en/os/ia64/openssh-3.1p1-5.ia64.rpm ftp://updates.redhat.com/7.1/en/os/ia64/openssh-askpass-3.1p1-5.ia64.rpm ftp://updates.redhat.com/7.1/en/os/ia64/openssh-askpass-gnome-3.1p1-5.ia64.rpm ftp://updates.redhat.com/7.1/en/os/ia64/openssh-clients-3.1p1-5.ia64.rpm ftp://updates.redhat.com/7.1/en/os/ia64/openssh-server-3.1p1-5.ia64.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/openssh-3.1p1-6.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/openssh-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/openssh-clients-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/openssh-server-3.1p1-6.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/openssh-3.1p1-6.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/openssh-askpass-3.1p1-6.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/openssh-askpass-gnome-3.1p1-6.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/openssh-clients-3.1p1-6.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/openssh-server-3.1p1-6.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/openssh-3.1p1-6.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/openssh-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.3/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.3/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.3/en/os/i386/openssh-clients-3.1p1-6.i386.rpm ftp://updates.redhat.com/7.3/en/os/i386/openssh-server-3.1p1-6.i386.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- d1f19327b85cddfbcf3167b3374842a7 7.0/en/os/SRPMS/openssh-3.1p1-5.src.rpm f6176399bd232630f8bb517d8f4dd42e 7.0/en/os/alpha/openssh-3.1p1-5.alpha.rpm 92807b7217c777dda6b9a43dbe7ce7fd 7.0/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm 9eea8c2d710290d4d7425c03aef26d2e 7.0/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm d3f22ca75eb56ac35f0084b5f25df3cb 7.0/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm 8f7553265365190f8714ff67a94af972 7.0/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm ea1910c305cd61e437271885280d5268 7.0/en/os/i386/openssh-3.1p1-5.i386.rpm db93fb0988ce7408f7f77a4589fd85b2 7.0/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm 998bb0b0e59a864d5156ec6c7e2a667f 7.0/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm 3071cba22fb9d00ea74275ddd6849e07 7.0/en/os/i386/openssh-clients-3.1p1-5.i386.rpm 4cb070808101c4f24cf892782556f734 7.0/en/os/i386/openssh-server-3.1p1-5.i386.rpm d1f19327b85cddfbcf3167b3374842a7 7.1/en/os/SRPMS/openssh-3.1p1-5.src.rpm f6176399bd232630f8bb517d8f4dd42e 7.1/en/os/alpha/openssh-3.1p1-5.alpha.rpm 92807b7217c777dda6b9a43dbe7ce7fd 7.1/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm 9eea8c2d710290d4d7425c03aef26d2e 7.1/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm d3f22ca75eb56ac35f0084b5f25df3cb 7.1/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm 8f7553265365190f8714ff67a94af972 7.1/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm ea1910c305cd61e437271885280d5268 7.1/en/os/i386/openssh-3.1p1-5.i386.rpm db93fb0988ce7408f7f77a4589fd85b2 7.1/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm 998bb0b0e59a864d5156ec6c7e2a667f 7.1/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm 3071cba22fb9d00ea74275ddd6849e07 7.1/en/os/i386/openssh-clients-3.1p1-5.i386.rpm 4cb070808101c4f24cf892782556f734 7.1/en/os/i386/openssh-server-3.1p1-5.i386.rpm 76771fe005710068cf7e77304d8e8c2d 7.1/en/os/ia64/openssh-3.1p1-5.ia64.rpm c1f660a37ac295a9d7f76c18c4e39a97 7.1/en/os/ia64/openssh-askpass-3.1p1-5.ia64.rpm d3dba2c6749555920d33a2bbf5c34bc7 7.1/en/os/ia64/openssh-askpass-gnome-3.1p1-5.ia64.rpm b1fbb0c89efdb666ca834d73776caef3 7.1/en/os/ia64/openssh-clients-3.1p1-5.ia64.rpm 41a2988a28bc02ed2d7268fedec3656d 7.1/en/os/ia64/openssh-server-3.1p1-5.ia64.rpm 84d1b32febbd22bcc76d44d3d985cf0d 7.2/en/os/SRPMS/openssh-3.1p1-6.src.rpm a634222cd0d59ce1e9510323128fc34b 7.2/en/os/i386/openssh-3.1p1-6.i386.rpm 1d84ecee0666441698fe7686c2f5ac3f 7.2/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm 7f568c333c7f15e2608b2adc134ad65a 7.2/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm f7c7bcce4abd79c9604b0d43a7978cc1 7.2/en/os/i386/openssh-clients-3.1p1-6.i386.rpm c40ab32a22bac14625a845e342512785 7.2/en/os/i386/openssh-server-3.1p1-6.i386.rpm 892dd7540ed71c530949baf736a4e96d 7.2/en/os/ia64/openssh-3.1p1-6.ia64.rpm 8dc28e066ad28fb16d57319af0297d47 7.2/en/os/ia64/openssh-askpass-3.1p1-6.ia64.rpm 317f50806f05d91df9f7742c8b6b1297 7.2/en/os/ia64/openssh-askpass-gnome-3.1p1-6.ia64.rpm e037c1229d3062c6ff3d2a5c022787dc 7.2/en/os/ia64/openssh-clients-3.1p1-6.ia64.rpm f067a362f3dd6b838476c93cfedc740a 7.2/en/os/ia64/openssh-server-3.1p1-6.ia64.rpm 84d1b32febbd22bcc76d44d3d985cf0d 7.3/en/os/SRPMS/openssh-3.1p1-6.src.rpm a634222cd0d59ce1e9510323128fc34b 7.3/en/os/i386/openssh-3.1p1-6.i386.rpm 1d84ecee0666441698fe7686c2f5ac3f 7.3/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm 7f568c333c7f15e2608b2adc134ad65a 7.3/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm f7c7bcce4abd79c9604b0d43a7978cc1 7.3/en/os/i386/openssh-clients-3.1p1-6.i386.rpm c40ab32a22bac14625a845e342512785 7.3/en/os/i386/openssh-server-3.1p1-6.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=openssh-unix-dev&m=102510268109227 http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=102511867031136 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. 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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 iQCVAwUBPRyB/ih9+71yA2DNAQGEPQP/Si37sos2J2USRuG0sqLG/TTCkdADESOo QQVcsaEeOL/llgmyGXlnfT/jPbnsixz3t2HQ45ck7MPeh3a+9NKzqeZlVXqOGrI9 5ZjUEKI6AsRIZdF2ghyR0VbqCvzZsuvKh4RaLjMJk52GE4WUC7Gu6rK+3KxxZHzs Ajvjeyq0ulE= =R5vz -----END PGP SIGNATURE-----