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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.297 -- RHSA-2001:095-04 New util-linux packages available to fix vipw permissions problems 18 July 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: vipw Vendor: Red Hat Operating System: Red Hat Linux 7.1 Platform: i386 Alpha ia64 Impact: Access Privileged Data Access Required: Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- - --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: New util-linux packages available to fix vipw permissions problems Advisory ID: RHSA-2001:095-04 Issue date: 2001-07-12 Updated on: 2001-07-16 Product: Red Hat Linux Keywords: util-linux vipw /etc/shadow permissions Cross references: Obsoletes: - --------------------------------------------------------------------- 1. Topic: New util-linux packages are available for Red Hat Linux 7.1. These packages fix a problem where vipw would leave the /etc/shadow file world-readable after editing it. It is recommended that all users update to the fixed packages. Also, if you have used vipw on Red Hat Linux 7.1 before, make sure to run (as root): chmod 0400 /etc/shadow 2. Relevant releases/architectures: Red Hat Linux 7.1 - alpha, i386, ia64 3. Problem description: vipw, from the util-linux package in Red Hat Linux 7.1, included a new option that allowed editing of the /etc/shadow file as well as /etc/passwd. However, this option did not take measures to ensure that the file remained only readable by root. Thanks go to lloyd@acm.jhu.edu for bringing the problem to our attention. 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. Also note that users of vipw may want to run (as root): chmod 0400 /etc/shadow to ensure that the file has the correct permissions. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 48786 - Serious security problem in vipw, util-linux 2.10s 6. RPMs required: Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/util-linux-2.10s-13.7.src.rpm alpha: ftp://updates.redhat.com/7.1/en/os/alpha/util-linux-2.10s-13.7.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/util-linux-2.10s-13.7.i386.rpm ia64: ftp://updates.redhat.com/7.1/en/os/ia64/util-linux-2.10s-13.7.ia64.rpm 7. Verification: MD5 sum Package Name - -------------------------------------------------------------------------- 96997395f6773109c6fe12f015145a4e 7.1/en/os/SRPMS/util-linux-2.10s-13.7.src.rpm 148ed6ee554cec8552a9795192deaa51 7.1/en/os/alpha/util-linux-2.10s-13.7.alpha.rpm 06f71eb2fd286d18ea45430ffe790b63 7.1/en/os/i386/util-linux-2.10s-13.7.i386.rpm dceed158e6eb988b972f924a01fdc265 7.1/en/os/ia64/util-linux-2.10s-13.7.ia64.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: 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. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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). 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