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Red Hat: 2007:0276-02 Low: Mailbox Race Condition in Shadow-Utils

Updated shadow-utils packages that fix a security issue and various bugs are now available. A flaw was found in the useradd tool in shadow-utils. A new user's mailbox, when created, could have random permissions for a short period. This could allow a local attacker to read or modify the mailbox. . - --------------------------------------------------------------------- Red Hat Security Advisory Synopsis: Low: shadow-utils security and bug fix update Advisory ID: RHSA-2007:0276-02 Advisory URL: https://access.redhat.com/errata/RHSA-2007:0276.html Issue date: 2007-05-01 Updated on: 2007-05-01 Product: Red Hat Enterprise Linux Keywords: mailbox race condition CVE Names: CVE-2006-1174 - ---------------------------------------------------------------------1. Summary: Updated shadow-utils packages that fix a security issue and various bugs are now available. This update has been rated as having low security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64 3. Problem description: The shadow-utils package includes the necessary programs for converting UNIX password files to the shadow password format, as well as programs for managing user and group accounts. A flaw was found in the useradd tool in shadow-utils. A new user's mailbox, when created, could have random permissions for a short period. This could allow a local attacker to read or modify the mailbox. (CVE-2006-1174) This update also fixes the following bugs: * shadow-utils debuginfo package was empty. * faillog was unusable on 64-bit systems. It checked every UID from 0 to the max UID, which was an excessively large number on 64-bit systems. *typo bug in login.defs file All users of shadow-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. 4. Solution: Before applying this update, make sure that all previously-released errata relevant to your system have been applied. Use Red Hat Network to download and update your packages. To launch the Red Hat Update Agent, use the following command: up2date For information on how to install packages manually, refer to the following Web page for the System Administration or Customization guide specific to your system: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10 5. Bug IDs fixed (http://bugzilla.redhat.com/): 176951 - shadow-utils-debuginfo is empty 177017 - faillog doesn't handle large UIDs well 188263 - typo in /etc/login.defs 193053 - CVE-2006-1174 shadow-utils mailbox creation race condition 6. RPMs required: Red Hat Enterprise Linux AS version 4: SRPMS: 27a806cdce6ee1e07c7178b0f97e61f8 shadow-utils-4.0.3-61.RHEL4.src.rpm i386: 97eb50ec2a451168eebbbfa7e2278bad shadow-utils-4.0.3-61.RHEL4.i386.rpm 7af873fec83429452328a0d99a7e9570 shadow-utils-debuginfo-4.0.3-61.RHEL4.i386.rpm ia64: 50e10226650a72262916f9af8a0809a1 shadow-utils-4.0.3-61.RHEL4.ia64.rpm 15525b069cb021c537d4ed39489909d9 shadow-utils-debuginfo-4.0.3-61.RHEL4.ia64.rpm ppc: 9db2a7e51c1d50c7afa7143769267127 shadow-utils-4.0.3-61.RHEL4.ppc.rpm 70005f73019bd015f9dd75fcbf3bcb0c shadow-utils-debuginfo-4.0.3-61.RHEL4.ppc.rpm s390: 581e4671e28971d933f86b22f00b3d81 shadow-utils-4.0.3-61.RHEL4.s390.rpm 1c7e1b2fd507b0be4e46d9810d48f0a4 shadow-utils-debuginfo-4.0.3-61.RHEL4.s390.rpm s390x: 20a2d814d215e9baf4157508cb4f2d23 shadow-utils-4.0.3-61.RHEL4.s390x.rpm d3ae98b5923ed05ce9ef13cd26b4891a shadow-utils-debuginfo-4.0.3-61.RHEL4.s390x.rpm x86_64: 8aaf79b408d0fd299809882843b7f3a1 shadow-utils-4.0.3-61.RHEL4.x86_64.rpm ac20c2785b17571d3a633996e0c427fa shadow-utils-debuginfo-4.0.3-61.RHEL4.x86_64.rpm Red Hat Enterprise Linux Desktop version 4: SRPMS: 27a806cdce6ee1e07c7178b0f97e61f8 shadow-utils-4.0.3-61.RHEL4.src.rpm i386: 97eb50ec2a451168eebbbfa7e2278bad shadow-utils-4.0.3-61.RHEL4.i386.rpm 7af873fec83429452328a0d99a7e9570 shadow-utils-debuginfo-4.0.3-61.RHEL4.i386.rpm x86_64: 8aaf79b408d0fd299809882843b7f3a1 shadow-utils-4.0.3-61.RHEL4.x86_64.rpm ac20c2785b17571d3a633996e0c427fa shadow-utils-debuginfo-4.0.3-61.RHEL4.x86_64.rpm Red Hat Enterprise Linux ES version 4: SRPMS: 27a806cdce6ee1e07c7178b0f97e61f8 shadow-utils-4.0.3-61.RHEL4.src.rpm i386: 97eb50ec2a451168eebbbfa7e2278bad shadow-utils-4.0.3-61.RHEL4.i386.rpm 7af873fec83429452328a0d99a7e9570 shadow-utils-debuginfo-4.0.3-61.RHEL4.i386.rpm ia64: 50e10226650a72262916f9af8a0809a1 shadow-utils-4.0.3-61.RHEL4.ia64.rpm 15525b069cb021c537d4ed39489909d9 shadow-utils-debuginfo-4.0.3-61.RHEL4.ia64.rpm x86_64: 8aaf79b408d0fd299809882843b7f3a1 shadow-utils-4.0.3-61.RHEL4.x86_64.rpm ac20c2785b17571d3a633996e0c427fa shadow-utils-debuginfo-4.0.3-61.RHEL4.x86_64.rpm Red Hat Enterprise Linux WS version 4: SRPMS: 27a806cdce6ee1e07c7178b0f97e61f8 shadow-utils-4.0.3-61.RHEL4.src.rpm i386: 97eb50ec2a451168eebbbfa7e2278bad shadow-utils-4.0.3-61.RHEL4.i386.rpm 7af873fec83429452328a0d99a7e9570 shadow-utils-debuginfo-4.0.3-61.RHEL4.i386.rpm ia64: 50e10226650a72262916f9af8a0809a1 shadow-utils-4.0.3-61.RHEL4.ia64.rpm 15525b069cb021c537d4ed39489909d9 shadow-utils-debuginfo-4.0.3-61.RHEL4.ia64.rpm x86_64: 8aaf79b408d0fd299809882843b7f3a1 shadow-utils-4.0.3-61.RHEL4.x86_64.rpm ac20c2785b17571d3a633996e0c427fa shadow-utils-debuginfo-4.0.3-61.RHEL4.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key#package 7.References: https://www.cve.org/CVERecord?id=CVE-2006-1174 https://access.redhat.com/security/updates/classification#low 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact Copyright 2007 Red Hat, Inc. . Red Hat has issued a low-severity update for shadow-utils, fixing a mailbox race condition that could compromise user experience and security. shadow-utils update, Red Hat advisory, mailbox permission risk. . Severity: Low. LinuxSecurity.com Team

May 01, 2007 •Low Red Hat