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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0160 -- RHSA-2003:086-07 Updated file packages fix vulnerability 11 March 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: file Vendor: Red Hat Operating System: Red Hat Linux 6.2 Red Hat Linux 7.0 Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0 Linux Platform: i386 IA-64 Impact: Execute Arbitrary Code/Commands Increased Privileges Ref: ESB-2003.0145 Comment: CVE Id: CAN-2003-0102 - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated file packages fix vulnerability Advisory ID: RHSA-2003:086-07 Issue date: 2003-03-05 Updated on: 2003-03-07 Product: Red Hat Linux Keywords: readelf.c flaw:buf Cross references: Obsoletes: CVE Names: CAN-2003-0102 - --------------------------------------------------------------------- 1. Topic: Updated file packages are available to close a buffer overflow vulnerability. 2. Relevant releases/architectures: Red Hat Linux 6.2 - i386 Red Hat Linux 7.0 - i386 Red Hat Linux 7.1 - i386 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 Red Hat Linux 8.0 - i386 3. Problem description: The file command is used to identify a particular file according to the type of data contained in the file. The file utility before version 3.41 contains a buffer overflow vulnerability in the ELF parsing routines. This vulnerability may allow an attacker to create a carefully crafted binary which can allow arbitrary code to be run if a victim runs the 'file' command on that binary. There are other ways that an attacker may be able to take advantage of this vulnerability in the file command: - -- In Red Hat Linux 6.2 and 7.0, the rhs-printfilter package makes use of the file command. This would allow an attacker who has the ability to print to execute arbitrary commands (as the user 'lp') on the print server by sending a malicious file. - -- On some Red Hat Linux distributions it may also be possible to trigger this exploit by encouraging the victim to use the 'less' command on a malicious file which is named so that it will be processed by the 'lesspipe.sh' script. All users are advised to update to these erratum packages, which contain a backported patch to correct this vulnerability. Red Hat would like to thank iDefense for disclosing this issue and zen-parse for discussion of some of the implications. 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. RPMs required: Red Hat Linux 6.2: SRPMS: ftp://updates.redhat.com/6.2/en/os/SRPMS/file-3.39-8.6x.src.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/file-3.39-8.6x.i386.rpm Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/file-3.39-8.7x.src.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/file-3.39-8.7x.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/file-3.39-8.7x.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/file-3.39-8.7x.i386.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/file-3.39-8.7x.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/file-3.39-8.7x.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/file-3.39-8.7x.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/file-3.39-8.7x.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/file-3.39-8.7x.i386.rpm Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/file-3.39-9.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/file-3.39-9.i386.rpm 6. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- 8cb16a37290c4714429eef117a56e551 6.2/en/os/SRPMS/file-3.39-8.6x.src.rpm e84840bfb63e0807652b4c795a211b48 6.2/en/os/i386/file-3.39-8.6x.i386.rpm 15c75893938ec25e6ae872674560d782 7.0/en/os/SRPMS/file-3.39-8.7x.src.rpm 57ff358a59f9420cebf55059ab64300d 7.0/en/os/i386/file-3.39-8.7x.i386.rpm 15c75893938ec25e6ae872674560d782 7.1/en/os/SRPMS/file-3.39-8.7x.src.rpm 57ff358a59f9420cebf55059ab64300d 7.1/en/os/i386/file-3.39-8.7x.i386.rpm 15c75893938ec25e6ae872674560d782 7.2/en/os/SRPMS/file-3.39-8.7x.src.rpm 57ff358a59f9420cebf55059ab64300d 7.2/en/os/i386/file-3.39-8.7x.i386.rpm 4fe9b98179258155d4a3d4dc4e543d13 7.2/en/os/ia64/file-3.39-8.7x.ia64.rpm 15c75893938ec25e6ae872674560d782 7.3/en/os/SRPMS/file-3.39-8.7x.src.rpm 57ff358a59f9420cebf55059ab64300d 7.3/en/os/i386/file-3.39-8.7x.i386.rpm 76ee5aa939dc04cd3cae2fdd18019f3d 8.0/en/os/SRPMS/file-3.39-9.src.rpm b0560e1725f28fe375f9885a7a6be684 8.0/en/os/i386/file-3.39-9.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 -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> 7. References: http://www.idefense.com/advisory/03.04.03.txt http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0102 8. Contact: The Red Hat security contact is <security@redhat.com>. More contact details at http://www.redhat.com/solutions/security/news/contact.html Copyright 2003 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/render.html?cid=1980 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 only. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBPm4Wfih9+71yA2DNAQFTpgP/ZBGtzd9KSjaxCcJiOZ0cFAjOL3eGgZfl Jnmnu7R9EIemvSTf8Agiarm5sUw/WHgZFDyGR2yX9uaZ/Ic9dQvtKZPXvKMcuih8 Ej0QA2wuf4poM+VzN6tPtm79jKJknGykuhVN2/DNozGYt8TRawLcN3v7xmP1vHMJ ZkCuwg56TA0= =oNzH -----END PGP SIGNATURE-----