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Ls Advisories Scientific Esm H240
Price Tag 1security advisorybug fixutil-linux

Scientific Linux: Util-linux Low Severity Update for System Bugs

Low: util-linux security, bug fix, and enhancement update. Date: Wed, 21 Mar 2012 16:25:00 -0500 Reply-To: This email address is being protected from spambots. You need JavaScript enabled to view it. Sender: Security Errata for Scientific Linux From: Patrick Riehecky Subject: Security ERRATA Low: util-linux on SL5.x i386/x86_64 Comments: To: This email address is being protected from spambots. You need JavaScript enabled to view it. Synopsis: Low: util-linux security, bug fix, and enhancement update Issue Date: 2012-02-21 CVE Numbers: CVE-2011-1675 CVE-2011-1677 The util-linux package contains a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, util-linux contains the fdisk configuration tool and the login program. Multiple flaws were found in the way the mount and umount commands performed mtab (mounted file systems table) file updates. A local, unprivileged user allowed to mount or unmount file systems could use these flaws to corrupt the mtab file and create a stale lock file, preventing other users from mounting and unmounting file systems. (CVE-2011-1675, CVE-2011-1677) This update also fixes the following bugs: * When the user logged into a telnet server, the login utility did not update the utmp database properly if the utility was executed from the telnetd daemon. This was due to telnetd not creating an appropriate entry in a utmp file before executing login. With this update, correct entries are created and the database is updated properly. * Various options were not described on the blockdev(8) manual page. With this update, the blockdev(8) manual page includes all the relevant options. * Prior to this update, the build process of the util-linux package failed in the po directory with the following error message: "@MKINSTALLDIRS@: No such file or directory". An upstream patch has been applied to address this issue, and the util-linux package now builds successfully. * Previously, the ipcs(1) and ipcrm(1) manual pages mentioned an invalid option, "-b". With this update, only valid options are listed on those manual pages. * Previously, the mount(8) manual pagecontained incomplete information about the ext4 and XFS file systems. With this update, the mount(8) manual page contains the missing information. In addition, this update adds the following enhancements: * Previously, if DOS mode was enabled on a device, the fdisk utility could report error messages similar to the following: Partition 1 has different physical/logical beginnings (non-Linux?): phys=(0, 1, 1) logical=(0, 2, 7) This update enables users to switch off DOS compatible mode (by specifying the "-c" option), and such error messages are no longer displayed. * This update adds the "fsfreeze" command which halts access to a file system on a disk. All users of util-linux are advised to upgrade to this updated package, which contains backported patches to correct these issues and add these enhancements. SL5: i386 util-linux-2.13-0.59.el5.i386.rpm util-linux-debuginfo-2.13-0.59.el5.i386.rpm x86_64 util-linux-2.13-0.59.el5.x86_64.rpm util-linux-debuginfo-2.13-0.59.el5.x86_64.rpm - Scientific Linux Development Team . The latest security advisory for util-linux in Scientific Linux outlines vital updates on low-severity vulnerabilities and bug fixes for system security and stability. util-linux update, security advisory, Scientific Linux. . Severity: Low. LinuxSecurity.com Team

Calendar 2 Mar 21, 2012 •Low Scientific Linux
91
Ls Advisories Gentoo Esm H240
Price Tag 1security advisoryGentoonormal severity

Gentoo: GLSA 200511-17 Normal: FUSE mtab Corruption Attack

The fusermount utility from FUSE can be abused to corrupt the /etc/mtab file contents, potentially allowing a local attacker to set unauthorized mount options. [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200511-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: FUSE: mtab corruption through fusermount Date: November 22, 2005 Bugs: #112902 ID: 200511-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= The fusermount utility from FUSE can be abused to corrupt the /etc/mtab file contents, potentially allowing a local attacker to set unauthorized mount options. Background ========= FUSE (Filesystem in Userspace) allows implementation of a fully functional filesystem in a userspace program. The fusermount utility is used to mount/unmount FUSE file systems. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-fs/fuse < 2.4.1-r1 > = 2.4.1-r1 Description ========== Thomas Biege discovered that fusermount fails to securely handle special characters specified in mount points. Impact ===== A local attacker could corrupt the contents of the /etc/mtab file by mounting over a maliciously-named directory using fusermount, potentially allowing the attacker to set unauthorized mount options. This is possible only if fusermount is installed setuid root, which is the default in Gentoo. Workaround ========= There is no known workaround at this time. Resolution ========= All FUSE users should upgrade to the latest version: #emerge --sync # emerge --ask --oneshot --verbose "> =sys-fs/fuse-2.4.1-r1" References ========= [ 1 ] CVE-2005-3531 https://www.cve.org/CVERecord?id=CVE-2005-3531 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200511-17 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.0/ . Debian alert DSA 2021-200 addresses potential vulnerability in DMARC settings. Update mailutils for enhanced protection.. FUSE, Gentoo, mtab Corruption, software update. . LinuxSecurity.com Team

Calendar 2 Nov 22, 2005 Gentoo
Banner 2 1028x280 1708121730 1 1771599631
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