===================================================================== CERT-Renater Note d'Information No. 2000/VULN087 _____________________________________________________________________ DATE : 23/05/2000 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Red Hat Linux 6.2 ====================================================================== --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated Kerberos 5 packages are now available for Red Hat Linux. Advisory ID: RHSA-2000:025-07 Issue date: 2000-05-16 Updated on: 2000-05-18 Product: Red Hat Linux Keywords: N/A Cross references: N/A --------------------------------------------------------------------- 1. Topic: Security vulnerabilities have been found in the Kerberos 5 implementation shipped with Red Hat Linux 6.2. 2. Relevant releases/architectures: Red Hat Linux 6.2 - i386 alpha sparc 3. Problem description: A number of possible buffer overruns were found in libraries included in the affected packages. A denial-of-service vulnerability was also found in the ksu program. * A remote user may gain unauthorized root access to a machine running services authenticated with Kerberos 4. * A remote user may gain unauthorized root access to a machine running krshd, regardless of whether the program is configured to accept Kerberos 4 authentication. * A local user may gain unauthorized root access by exploiting v4rcp or ksu. A packaging error was discovered in the original set of updates. This set of update packages includes no functional differences compared to the previously-released set. 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): 10653 - 'stat' unresolved on "libkrb5.so.2.2" load 11496 - security-updated krb5 packages fail dependencies 6. RPMs required: Red Hat Linux 6.2: intel: ftp://ftp.redhat.com/6.2/i386/krb5-configs-1.1.1-16.i386.rpm ftp://ftp.redhat.com/6.2/i386/krb5-devel-1.1.1-16.i386.rpm ftp://ftp.redhat.com/6.2/i386/krb5-libs-1.1.1-16.i386.rpm ftp://ftp.redhat.com/6.2/i386/krb5-server-1.1.1-16.i386.rpm ftp://ftp.redhat.com/6.2/i386/krb5-workstation-1.1.1-16.i386.rpm alpha: ftp://ftp.redhat.com/6.2/alpha/krb5-configs-1.1.1-16.alpha.rpm ftp://ftp.redhat.com/6.2/alpha/krb5-devel-1.1.1-16.alpha.rpm ftp://ftp.redhat.com/6.2/alpha/krb5-libs-1.1.1-16.alpha.rpm ftp://ftp.redhat.com/6.2/alpha/krb5-server-1.1.1-16.alpha.rpm ftp://ftp.redhat.com/6.2/alpha/krb5-workstation-1.1.1-16.alpha.rpm sparc: ftp://ftp.redhat.com/6.2/sparc/krb5-configs-1.1.1-16.sparc.rpm ftp://ftp.redhat.com/6.2/sparc/krb5-devel-1.1.1-16.sparc.rpm ftp://ftp.redhat.com/6.2/sparc/krb5-libs-1.1.1-16.sparc.rpm ftp://ftp.redhat.com/6.2/sparc/krb5-server-1.1.1-16.sparc.rpm ftp://ftp.redhat.com/6.2/sparc/krb5-workstation-1.1.1-16.sparc.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 683bda3272d3f2cbcbb8e0a7c0406ccf 6.2/alpha/krb5-configs-1.1.1-16.alpha.rpm ba5f06e4c645ea8ab1d3bcd4487ebaa6 6.2/alpha/krb5-devel-1.1.1-16.alpha.rpm 77cf98beb23c287fc012cd6dc6521301 6.2/alpha/krb5-libs-1.1.1-16.alpha.rpm 6ad4f37397a234c1d46885c4abc6ba5e 6.2/alpha/krb5-server-1.1.1-16.alpha.rpm daf0856da5ba8007fa54aebe6b5089f4 6.2/alpha/krb5-workstation-1.1.1-16.alpha.rpm 3612c7bcf0b08dfb721dcc32f31507d0 6.2/i386/krb5-configs-1.1.1-16.i386.rpm f3c2789283ace967e7690e50227e7f35 6.2/i386/krb5-devel-1.1.1-16.i386.rpm ea698e0bcf61f8281055a7ff9d9e2615 6.2/i386/krb5-libs-1.1.1-16.i386.rpm 0b176c84d19f4ccc2e0d4e894008c2ba 6.2/i386/krb5-server-1.1.1-16.i386.rpm 91d06f5759da4b0de0d4969e09ceb8e6 6.2/i386/krb5-workstation-1.1.1-16.i386.rpm 221e76df87c09b4d9746246a7746454d 6.2/sparc/krb5-configs-1.1.1-16.sparc.rpm 209e4547f41861fc6d7f505ea6c1bd85 6.2/sparc/krb5-devel-1.1.1-16.sparc.rpm 818d5fe6042250f310cdf2f94f14c3c8 6.2/sparc/krb5-libs-1.1.1-16.sparc.rpm 9acfdfbafc2f34e89296bb34e7750343 6.2/sparc/krb5-server-1.1.1-16.sparc.rpm aefb875acc83970a5e253895a1611549 6.2/sparc/krb5-workstation-1.1.1-16.sparc.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 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 8. References: N/A ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================