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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0319 -- RHSA-2003:142-01 Updated LPRng packages fix psbanner vulnerability 28 April 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: LPRng psbanner Vendor: Red Hat Operating System: Red Hat Linux 9 Red Hat Linux 8.0 Red Hat Linux 7.3 Red Hat Linux 7.2 Red Hat Linux 7.1 Linux Impact: Overwrite Arbitrary Files Access Required: Existing Account CVE Names: CAN-2003-0136 - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat Security Advisory Synopsis: Updated LPRng packages fix psbanner vulnerability Advisory ID: RHSA-2003:142-01 Issue date: 2003-04-24 Updated on: 2003-04-24 Product: Red Hat Linux Keywords: Cross references: Obsoletes: CVE Names: CAN-2003-0136 - --------------------------------------------------------------------- 1. Topic: Updated LPRng packages resolving a temporary file vulnerability are now available. 2. Relevant releases/architectures: 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 Red Hat Linux 9 - i386 3. Problem description: LPRng is a print spooler. LPRng includes a program, psbanner, that can be used to produce Postscript banner pages to separate print jobs. A vulnerability has been found in psbanner, which creates a temporary file with a known filename in an insecure manner. An attacker could create a symbolic link and cause arbitrary files to be written as the 'lp' user. Note: psbanner is not used by the default Red Hat Linux LPRng configuration. Users that have configured LPRng to use psbanner should install these updated packages, which contain a patch so that psbanner does not create the temporary file. 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 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/LPRng-3.7.4-23.2.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/LPRng-3.7.4-23.2.i386.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/LPRng-3.7.4-28.2.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/LPRng-3.7.4-28.2.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/LPRng-3.7.4-28.2.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/LPRng-3.8.9-4.1.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/LPRng-3.8.9-4.1.i386.rpm Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/LPRng-3.8.9-6.1.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/LPRng-3.8.9-6.1.i386.rpm Red Hat Linux 9: SRPMS: ftp://updates.redhat.com/9/en/os/SRPMS/LPRng-3.8.19-3.1.src.rpm i386: ftp://updates.redhat.com/9/en/os/i386/LPRng-3.8.19-3.1.i386.rpm 6. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- f4f70efc6363a4c2b6d06a3893e0ecdf 7.1/en/os/SRPMS/LPRng-3.7.4-23.2.src.rpm b824dd8dc417d6caf64a1462cf3ee138 7.1/en/os/i386/LPRng-3.7.4-23.2.i386.rpm 4fcb04dd30b0b8144b31c3dc020f7bbf 7.2/en/os/SRPMS/LPRng-3.7.4-28.2.src.rpm 3eea2e52580beb8e2437855901995d11 7.2/en/os/i386/LPRng-3.7.4-28.2.i386.rpm d017fc79c74f94d8809a63710658014d 7.2/en/os/ia64/LPRng-3.7.4-28.2.ia64.rpm 7ed2a78d5605ca8af15988f184f848b7 7.3/en/os/SRPMS/LPRng-3.8.9-4.1.src.rpm 105253d098ab618fc75b84d14eb4e7f4 7.3/en/os/i386/LPRng-3.8.9-4.1.i386.rpm c39036850c236dbfad1818d0a7a50ff7 8.0/en/os/SRPMS/LPRng-3.8.9-6.1.src.rpm 6957f122cdae8d65ff23703e238d221a 8.0/en/os/i386/LPRng-3.8.9-6.1.i386.rpm 4033bde51dddedb0baa7d02d8f3b1e95 9/en/os/SRPMS/LPRng-3.8.19-3.1.src.rpm 2d07bfe130a9af58df5afb09b40a3181 9/en/os/i386/LPRng-3.8.19-3.1.i386.rpm These packages are GPG signed by Red Hat for security. Our key is available at http://www.redhat.com/solutions/security/news/publickey/ 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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=188366 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0136 8. Contact: The Red Hat security contact is <security@redhat.com>. More contact details at http://www.redhat.com/solutions/security/news/contact/ 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 iQCVAwUBPq1R2ih9+71yA2DNAQFyswQAg0CeCVwazeKZ/HmzxWZydTbLLKeCp87y SdWWkh/4vyJTjDVl10pXSnAu3oFbeqj531sc3XbGGczB/8zRLkcmyRiL6598xiUq mJd2I6JJTUwBQn3uhCc9mBCOndhrOKwmZJpS7IFkqZEL4IBl763cjjihTwCQoCyk f3k3dZFM+0A= =WYTv -----END PGP SIGNATURE-----