__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Updated less Package Fixes Security Issue [Red Hat RHSA-2005:068-11] January 26, 2005 19:00 GMT Number P-112 [REVISED 14 Feb 2005] ______________________________________________________________________________ PROBLEM: There is a heap based buffer overflow in less, caused by a patch added to the less package in Red Hat Enterprise Linux 3. PLATFORM: Red Hat Desktop (v. 3) Red Hat Enterprise Linux AS, ES, WS (v. 3) SGI ProPack 3 Service Pack 3 DAMAGE: Less could crash or possibly execute arbitrary code when opened. SOLUTION: Upgrade to the appropriate package. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. An attacker could construct a carefully ASSESSMENT: crafted file that could cause less to crash or execute arbitrary code when opened. Red Hat believes that the Exec-Shield technology (enabled by default since Update 3) will block attempts to remotely exploit this vulnerability on x86 architectures. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-112.shtml ORIGINAL BULLETIN: Red Hat RHSA-2005:068-11 https://rhn.redhat.com/errata/RHSA-2005-068.html ADDITIONAL LINK: SGI Security Advisory Update #25, 20050201-01-U http://www.sgi.com/support/security/advisories.html CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2005-0086 ______________________________________________________________________________ REVISION HISTORY: 02/14/2005 - added a link to SGI Security Advisory Update #25, 20050201-01-U that provides a patch that includes updated SGI ProPack 3 Service Pack 3 RPMs for the SGI Altix family of systems. [***** Start Red Hat RHSA-2005:068-11 *****] Updated less package fixes security issue Advisory: RHSA-2005:068-11 Last updated on: 2005-01-26 Affected Products: Red Hat Desktop (v. 3) Red Hat Enterprise Linux AS (v. 3) Red Hat Enterprise Linux ES (v. 3) Red Hat Enterprise Linux WS (v. 3) CVEs (cve.mitre.org): CAN-2005-0086 back Security Advisory Details: An updated less package that fixes segmentation fault when viewing binary files is now available. The less utility is a text file browser that resembles more, but has extended capabilities. Victor Ashik discovered a heap based buffer overflow in less, caused by a patch added to the less package in Red Hat Enterprise Linux 3. An attacker could construct a carefully crafted file that could cause less to crash or possibly execute arbitrary code when opened. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0086 to this issue. Note that this issue only affects the version of less distributed with Red Hat Enterprise Linux 3. Red Hat believes that the Exec-Shield technology (enabled by default since Update 3) will block attempts to remotely exploit this vulnerability on x86 architectures. All users of the less package should upgrade to this updated package, which resolves this issue. Updated packages: Red Hat Desktop (v. 3) -------------------------------------------------------------------------------- SRPMS: less-378-12.src.rpm 00632a5f0e1bfc0e752251700537b74e IA-32: less-378-12.i386.rpm 2966089410f98b11a3e5580ab1c2a41d x86_64: less-378-12.x86_64.rpm 8dd24b870a1ce118bcddff29e0a94074 Red Hat Enterprise Linux AS (v. 3) -------------------------------------------------------------------------------- SRPMS: less-378-12.src.rpm 00632a5f0e1bfc0e752251700537b74e IA-32: less-378-12.i386.rpm 2966089410f98b11a3e5580ab1c2a41d IA-64: less-378-12.ia64.rpm 144c0b176f93cc9962928d87d262c14d PPC: less-378-12.ppc.rpm 01a9360e6bca2675788d7d62900cadef s390: less-378-12.s390.rpm 75dcd61eb532e06b0d3948694e8a831f s390x: less-378-12.s390x.rpm 2c5755559a11e4ab36726db10f8c005c x86_64: less-378-12.x86_64.rpm 8dd24b870a1ce118bcddff29e0a94074 Red Hat Enterprise Linux ES (v. 3) -------------------------------------------------------------------------------- SRPMS: less-378-12.src.rpm 00632a5f0e1bfc0e752251700537b74e IA-32: less-378-12.i386.rpm 2966089410f98b11a3e5580ab1c2a41d IA-64: less-378-12.ia64.rpm 144c0b176f93cc9962928d87d262c14d x86_64: less-378-12.x86_64.rpm 8dd24b870a1ce118bcddff29e0a94074 Red Hat Enterprise Linux WS (v. 3) -------------------------------------------------------------------------------- SRPMS: less-378-12.src.rpm 00632a5f0e1bfc0e752251700537b74e IA-32: less-378-12.i386.rpm 2966089410f98b11a3e5580ab1c2a41d IA-64: less-378-12.ia64.rpm 144c0b176f93cc9962928d87d262c14d x86_64: less-378-12.x86_64.rpm 8dd24b870a1ce118bcddff29e0a94074 (The unlinked packages above are only available from the Red Hat Network) 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. Bugs fixed: (see bugzilla for more information) 145527 - CAN-2005-0086 less crashes on scrolling of binary files References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0086 -------------------------------------------------------------------------------- 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 Red Hat RHSA-2005:068-11 *****] _______________________________________________________________________________ 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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