__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Red Hat Updated KDE packages fix security issues [RHSA-2003:269-11] September 17, 2003 17:00 GMT Number N-150 [REVISED 27 Oct 2003] ______________________________________________________________________________ PROBLEM: 1) A bug in the KDE Display Manager (KDM) when checking the result of a pam_setcred() call may cause an error condition to be triggered by the installed PAM modules. 2) The session cookie generation algorithm used by KDM is considered too weak to supply a full 128 bits of entropy. PLATFORM: Red Hat Linux 7.1, 7.2, 7.3, 8.0, 9 Red Hat Enterprise Linux products DAMAGE: 1) Any user with valid login credentials might be granted local root access with KDM 2) Non-authorized users, who are able to bypass any host restrictions may gain access to the current session. SOLUTION: Use updated patches. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Any user with valid login credentials may ASSESSMENT: be granted local root access. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-150.shtml ORIGINAL BULLETIN: https://rhn.redhat.com/errata/RHSA-2003-269.html ADDITIONAL LINKS: https://rhn.redhat.com/errata/RHSA-2003-270.html http://www.kde.org/info/security/advisory-20030916-1.txt ______________________________________________________________________________ REVISION HISTORY: 10-27-03 - Added additional link for Red Hat Advisory RHSA2003:270 for patches to their Red Hat Enterprise Linux products. [***** Start RHSA-2003:269-11 *****] Updated KDE packages fix security issues Advisory: RHSA-2003:269-11 Last updated on: 2003-09-16 Affected Products: Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0 Red Hat Linux 9 CVEs (cve.mitre.org): CAN-2003-0690 CAN-2003-0692 Security Advisory Details: Updated KDE packages that resolve a local security issue with KDM PAM support and weak session cookie generation are now available. KDE is a graphical desktop environment for the X Window System. KDE between versions 2.2.0 and 3.1.3 inclusive contain a bug in the KDE Display Manager (KDM) when checking the result of a pam_setcred() call. If an error condition is triggered by the installed PAM modules, KDM might grant local root access to any user with valid login credentials. It has been reported that one way to trigger this bug is by having a certain configuration of the MIT pam_krb5 module that leaves a session alive and gives root access to a regular user. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0690 to this issue. In addition, the session cookie generation algorithm used by KDM was considered too weak to supply a full 128 bits of entropy. This could make it possible for non-authorized users, who are able to bypass any host restrictions, to brute-force the session cookie and gain acess to the current session. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0692 to this issue. Users of KDE are advised to upgrade to these erratum packages, which contain security patches correcting these issues. Red Hat would like to thank the KDE team for notifying us of this issue and providing the security patches. Updated packages: Red Hat Linux 7.1 --------------------------------------------------------------------------- SRPMS: kdebase-2.2.2-0.71.5.src.rpm [ via FTP ] [ via HTTP ] cb6bb0a57fe9f3b14a20587f46987d4f i386: kdebase-2.2.2-0.71.5.i386.rpm [ via FTP ] [ via HTTP ] 5a46ecc2211a258c40bf507b8b29abd3 kdebase-devel-2.2.2-0.71.5.i386.rpm [ via FTP ] [ via HTTP ] 40b6300799af3d9bc02e7e22a7379497 Red Hat Linux 7.2 --------------------------------------------------------------------------- SRPMS: kdebase-2.2.2-11.src.rpm [ via FTP ] [ via HTTP ] 920975f4a5a0ad3afed469b4cd7101bc i386: kdebase-2.2.2-11.i386.rpm [ via FTP ] [ via HTTP ] 80e0d4d9a3d43578db0acc7ff8df220d kdebase-devel-2.2.2-11.i386.rpm [ via FTP ] [ via HTTP ] c7dc480e86ba296ea49405957a099e98 ia64: kdebase-2.2.2-11.ia64.rpm [ via FTP ] [ via HTTP ] 299579139bcce74c6a7016b541345b4c kdebase-devel-2.2.2-11.ia64.rpm [ via FTP ] [ via HTTP ] 78c1159be0e74352400a05ad3e01ae90 Red Hat Linux 7.3 --------------------------------------------------------------------------- SRPMS: kdebase-3.0.5a-0.73.4.src.rpm [ via FTP ] [ via HTTP ] c447ab78bdbc8543efbb808a43729385 i386: kdebase-3.0.5a-0.73.4.i386.rpm [ via FTP ] [ via HTTP ] b065e5b78dd710934b63f328b08d1560 kdebase-devel-3.0.5a-0.73.4.i386.rpm [ via FTP ] [ via HTTP ] ae98720219e096dfa1793b95de7f4ebc Red Hat Linux 8.0 --------------------------------------------------------------------------- SRPMS: kdebase-3.0.5a-9.src.rpm [ via FTP ] [ via HTTP ] 15ecc4af762e759f88ecf568711a68df i386: kdebase-3.0.5a-9.i386.rpm [ via FTP ] [ via HTTP ] 5b6bd4dbb3dcd08bfbd091cf6fdada0d kdebase-devel-3.0.5a-9.i386.rpm [ via FTP ] [ via HTTP ] c703a3356091161e3147ffdbccf9763b Red Hat Linux 9 --------------------------------------------------------------------------- SRPMS: kdebase-3.1-15.src.rpm [ via FTP ] [ via HTTP ] 549903de2f482c68f05cb0659a085560 i386: kdebase-3.1-15.i386.rpm [ via FTP ] [ via HTTP ] 4bb6fef4d5f0a82473082912926daeda kdebase-devel-3.1-15.i386.rpm [ via FTP ] [ via HTTP ] d2ba495ab6fea5d3ef67e96cfca32d59 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. If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website: https://rhn.redhat.com/help/latest-up2date.pxt References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0690 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0692 http://www.kde.org/info/security/advisory-20030916-1.txt Keywords: PAM, pam_krb5, pam_setcred --------------------------------------------------------------------------- The listed packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/solutions/security/news/publickey/#key You can verify each package and see who signed it 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 md5sum with the following command: md5sum filename The Red Hat security contact is security@redhat.com. More contact details at http://www.redhat.com/solutions/security/news/contact.html [***** End RHSA-2003:269-11 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Red Hat for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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