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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.208 -- RHSA-2001:067-03 Updated minicom packages available 21 May 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: minicom Vendor: Red Hat Operating System: Red Hat Linux 5.2 Red Hat Linux 6.2 Red Hat Linux 7.0 Red Hat Linux 7.1 Linux Platform: i386 Sparc Alpha Impact: Root Compromise Access Required: Local - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated minicom packages available Advisory ID: RHSA-2001:067-03 Issue date: 2001-05-03 Updated on: 2001-05-09 Product: Red Hat Linux Keywords: minicom security format string exploit Cross references: Obsoletes: - --------------------------------------------------------------------- 1. Topic: The minicom program allows any user with local shell access to obtain group uucp priveledges. It may also be possible for the malicious user to obtain root priveledges as well. 2. Relevant releases/architectures: Red Hat Linux 5.2 - alpha, i386, sparc Red Hat Linux 6.2 - alpha, i386, sparc Red Hat Linux 7.0 - alpha, i386 Red Hat Linux 7.1 - i386 3. Problem description: Minicom contains a great number of format string abuses in it's usage of several printf-like varargs functions. The program was never written with security in mind, and as such even though many format strings bugs have been fixed in this release, there are many more lurking in the code. This release solves the security problem by disabling setgid uucp on the minicom binary. 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. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 35613 - SGID uucp from minicom = format string + setgid uucp + makewhatis.cron bug 6. RPMs required: Red Hat Linux 5.2: SRPMS: ftp://updates.redhat.com/5.2/en/os/SRPMS/minicom-1.83.1-1.0.5x.src.rpm alpha: ftp://updates.redhat.com/5.2/en/os/alpha/minicom-1.83.1-1.0.5x.alpha.rpm i386: ftp://updates.redhat.com/5.2/en/os/i386/minicom-1.83.1-1.0.5x.i386.rpm sparc: ftp://updates.redhat.com/5.2/en/os/sparc/minicom-1.83.1-1.0.5x.sparc.rpm Red Hat Linux 6.2: SRPMS: ftp://updates.redhat.com/6.2/en/os/SRPMS/minicom-1.83.1-1.0.6x.src.rpm alpha: ftp://updates.redhat.com/6.2/en/os/alpha/minicom-1.83.1-1.0.6x.alpha.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/minicom-1.83.1-1.0.6x.i386.rpm sparc: ftp://updates.redhat.com/6.2/en/os/sparc/minicom-1.83.1-1.0.6x.sparc.rpm Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/minicom-1.83.1-8.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/minicom-1.83.1-8.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/minicom-1.83.1-8.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/minicom-1.83.1-8.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/minicom-1.83.1-8.i386.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- 5991bffcfbe2900f4522c03b981ae0bb 5.2/en/os/SRPMS/minicom-1.83.1-1.0.5x.src.rpm b0f31c02364c8fa9cc296eaa8e5e25d6 5.2/en/os/alpha/minicom-1.83.1-1.0.5x.alpha.rpm e7875eb52e0b1166be8b1dd7e540dfa1 5.2/en/os/i386/minicom-1.83.1-1.0.5x.i386.rpm 2b844a4be94f692973c5d8e8e1cd0eb9 5.2/en/os/sparc/minicom-1.83.1-1.0.5x.sparc.rpm d6ecd41e7df093ca62f8d1ab15a2d51c 6.2/en/os/SRPMS/minicom-1.83.1-1.0.6x.src.rpm b27358ca1604b2ca5fa8ec6a34fa6349 6.2/en/os/alpha/minicom-1.83.1-1.0.6x.alpha.rpm 158495648d2d3f8a2636d345249fc01a 6.2/en/os/i386/minicom-1.83.1-1.0.6x.i386.rpm ca9069a87bfa81fe730cb8f31378e57a 6.2/en/os/sparc/minicom-1.83.1-1.0.6x.sparc.rpm eb41cbef4946cccb1e1e388a88bf4e88 7.0/en/os/SRPMS/minicom-1.83.1-8.src.rpm 2da88e6d8479ccb35078ec1a469b3568 7.0/en/os/alpha/minicom-1.83.1-8.alpha.rpm 5567d943ad44b7f44e332576edabdb5e 7.0/en/os/i386/minicom-1.83.1-8.i386.rpm 599a686fa0598467f5ee451f934c8a28 7.1/en/os/SRPMS/minicom-1.83.1-8.src.rpm 5cfe67255b3ec7df6c3f1b274da3c7ad 7.1/en/os/i386/minicom-1.83.1-8.i386.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 <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: rpm --checksig --nogpg <filename> 8. References: None. Copyright(c) 2000, 2001 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. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html 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 emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOwlF8Sh9+71yA2DNAQGpygP/RkCDzLnnjGtatrC8wvF2Ln3gfY5bOBEF IVgJcqwqSmz4YEV7iOc7tb2AIFMD6bDWmIrHMRkYujgsWUUWHRFXpeCiIMhLV7+P Uk0FUyBeyYVsgKBUfsXlO2WHm4kDv8UiuoV1wcR+5G99zfl8WeTOFzGYWMfMRTB0 AXIdt1x2h7Y= =Y+1z -----END PGP SIGNATURE-----