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Fedora Legacy Update AdvisorySynopsis: Updated sharutils package fixes security issues Advisory ID: FLSA:2155 Issue date: 2005-03-24 Product: Red Hat Linux, Fedora Core Keywords: Bugfix Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=2155 CVE Names: N/A ---------------------------------------------------------------------
--------------------------------------------------------------------- 1. Topic:
Updated sharutils packages that fix several security issues are now available.
The sharutils package contains a set of tools for encoding and decoding packages of files in binary or text format.
2. Relevant releases/architectures:
Red Hat Linux 7.3 - i386 Red Hat Linux 9 - i386 Fedora Core 1 - i386
3. Problem description:
Ulf Harnhammar discovered a buffer overflow in shar.c, where the length of data returned by the wc command is not checked. Florian Schilhabel discovered another buffer overflow in unshar.c. Shaun Colley discovered a stack-based buffer overflow vulnerability in the -o command-line option handler. An attacker could exploit these vulnerabilities to execute arbitrary code as the user running one of the sharutils programs.
All users of sharutils should upgrade to these packages, which resolve these issues.
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 yum and apt. Many people find this an easier way to apply updates. To use yum issue:
yum update
or to use apt:
apt-get update; apt-get upgrade
This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www.fedoralegacy.org/docs for directions on how to configure yum and apt-get.
5. Bug IDs fixed:
6. RPMs required:
Red Hat Linux 7.3:
SRPM: http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/sharutils-4.2.1-12.7.x.legacy.src.rpm
i386: http://download.fedoralegacy.org/redhat/7.3/updates/i386/sharutils-4.2.1-12.7.x.legacy.i386.rpm
Red Hat Linux 9:
SRPM: http://download.fedoralegacy.org/redhat/9/updates/SRPMS/sharutils-4.2.1-16.9.1.legacy.src.rpm
i386: http://download.fedoralegacy.org/redhat/9/updates/i386/sharutils-4.2.1-16.9.1.legacy.i386.rpm
Fedora Core 1:
SRPM: http://download.fedoralegacy.org/fedora/1/updates/SRPMS/sharutils-4.2.1-17.2.legacy.src.rpm
i386: http://download.fedoralegacy.org/fedora/1/updates/i386/sharutils-4.2.1-17.2.legacy.i386.rpm
7. Verification:
SHA1 sum Package Name ---------------------------------------------------------------------
These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php
You can verify each package with the following command:
rpm --checksig -v <filename>
If you only wish to verify that each package has not been corrupted or tampered with, examine only the sha1sum with the following command:
sha1sum <filename>
8. References:
http://www.securityfocus.com/advisories/7268
9. Contact:
The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. More project details at http://www.fedoralegacy.org
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