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[RHSA-2002:064-12] Updated Nautilus for symlink vulnerability writing metadata files


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Date: Thu, 2 May 2002 14:58 -0400
From: [email protected]
To: [email protected]
Subject: [RHSA-2002:064-12] Updated Nautilus for symlink vulnerability writing metadata files
Cc: [email protected], [email protected]

---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated Nautilus for symlink vulnerability writing metad=
ata files
Advisory ID:       RHSA-2002:064-12
Issue date:        2002-04-16
Updated on:        2002-04-30
Product:           Red Hat Linux
Ключевые слова: , , , , , , , , , nautilus, metadata, symlink,  (найти похожие документы)
Cross references:=20=20 Obsoletes:=20=20=20=20=20=20=20=20=20 --------------------------------------------------------------------- 1. Topic: The Nautilus file manager in Red Hat Linux 7.2 has a symlink vulnerability. 2. Relevant releases/architectures: Red Hat Linux 7.2 - i386, ia64, s390 3. Problem description: The Nautilus file manager (used by default in the GNOME desktop environment) writes metadata files containing information about files and directories that have been visited in the file manager. The metadata file code in Red Hat Linux 7.2 can be tricked into chasing a symlink and overwriting the symlink target. The errata packages repair this problem in two ways. First they create metadata files using mkstemp() and then renaming the files, instead of creating the files in-place with a fixed filename. This patch in the errata packages was backported from the latest upstream version of Nautilus on cvs.gnome.org. Second, Nautilus used to have a preference to store metadata only in the=20 user's home directory, rather than in each directory being browsed.=20 This errata removes the preference and hardcodes its value to always=20 use the home directory. This disables the shared-metadata functionality, so if two users browse the same directory they may see different icons,=20 emblems, and so forth. Nautilus has only been shipped in Red Hat Linux 7.2; earlier versions do not contain Nautilus and thus are not vulnerable. This problem should only be exploitable locally (filesystem access=20 is needed to create a malicious symlink). If Nautilus is not run=20 as root, the impact should be limited to overwriting files that unprivileged users have access to. If Nautilus is run as root,=20 a malicious symlink could overwrite system-critical files such=20 as /etc/passwd with Nautilus metadata. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0157 to this issue. The BUGTRAQ ID for this=20 issue is 4373. 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): 6. RPMs required: Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/nautilus-1.0.4-46.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/nautilus-1.0.4-46.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/nautilus-devel-1.0.4-46.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/nautilus-mozilla-1.0.4-46.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/nautilus-1.0.4-46.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/nautilus-devel-1.0.4-46.ia64.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- df668f91e33ecf794aa10eee7e236f80 7.2/en/os/SRPMS/nautilus-1.0.4-46.src.rpm f91c1cb8fb30034c8ea8aefa184c5589 7.2/en/os/i386/nautilus-1.0.4-46.i386.rpm af4c6accb8c0e4ec60921e0938ad925d 7.2/en/os/i386/nautilus-devel-1.0.4-46.i38= 6.rpm 84ffe4f70577e6d235086a8a7cd86a4d 7.2/en/os/i386/nautilus-mozilla-1.0.4-46.i= 386.rpm be8f595a061435b13675d9c799377f33 7.2/en/os/ia64/nautilus-1.0.4-46.ia64.rpm 6528cdff10addff8d09e8f0d8e13a49e 7.2/en/os/ia64/nautilus-devel-1.0.4-46.ia6= 4.rpm =20 These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact/pgpkey.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: http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2002-0157 Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

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