FLSA-2005:154991: Updated sharutils package fixes security issue
Posted on: 07/10/2005 05:15 PM

Updated sharutils packages are available for Red Hat Linux 7.3/9 and Fedora Core 1/2

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Fedora Legacy Update Advisory

Synopsis: Updated sharutils package fixes security issue
Advisory ID: FLSA:154991
Issue date: 2005-07-10
Product: Red Hat Linux, Fedora Core
Keywords: Bugfix
CVE Names: CAN-2005-0990
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1. Topic:

Updated packages for sharutils which fix a security vulnerability 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
Fedora Core 2 - i386

3. Problem description:

A bug was found in the way unshar creates temporary files. A local user could use symlinks to overwrite arbitrary files the victim running unshar has write access to. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0990 to this issue.

All users of sharutils should upgrade to these packages, which resolve this issue.

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:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=154991

6. RPMs required:

Red Hat Linux 7.3:

SRPM:
http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/sharutils-4.2.1-12.8.legacy.src.rpm

i386:
http://download.fedoralegacy.org/redhat/7.3/updates/i386/sharutils-4.2.1-12.8.legacy.i386.rpm

Red Hat Linux 9:

SRPM:
http://download.fedoralegacy.org/redhat/9/updates/SRPMS/sharutils-4.2.1-16.9.2.legacy.src.rpm

i386:
http://download.fedoralegacy.org/redhat/9/updates/i386/sharutils-4.2.1-16.9.2.legacy.i386.rpm

Fedora Core 1:

SRPM:
http://download.fedoralegacy.org/fedora/1/updates/SRPMS/sharutils-4.2.1-17.3.legacy.src.rpm

i386:
http://download.fedoralegacy.org/fedora/1/updates/i386/sharutils-4.2.1-17.3.legacy.i386.rpm

Fedora Core 2:

SRPM:
http://download.fedoralegacy.org/fedora/2/updates/SRPMS/sharutils-4.2.1-18.3.FC2.legacy.src.rpm

i386:
http://download.fedoralegacy.org/fedora/2/updates/i386/sharutils-4.2.1-18.3.FC2.legacy.i386.rpm

7. Verification:

SHA1 sum Package Name
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b7bc64c53c9352cd872da7d6b05087a403eeb342
redhat/7.3/updates/i386/sharutils-4.2.1-12.8.legacy.i386.rpm
ecd2c836c88cd4deee0f421695cf69c59dbd6895
redhat/7.3/updates/SRPMS/sharutils-4.2.1-12.8.legacy.src.rpm
00132d8850d0db03c6adae00ecece7c99de20223
redhat/9/updates/i386/sharutils-4.2.1-16.9.2.legacy.i386.rpm
715cf1cc13d0a99c379466299d67a0028bbc29c8
redhat/9/updates/SRPMS/sharutils-4.2.1-16.9.2.legacy.src.rpm
000778eae9c2f079a98f5579669eecf841fba6c7
fedora/1/updates/i386/sharutils-4.2.1-17.3.legacy.i386.rpm
3e2f5b5babcd978e4d1ef96af504f8ee6eb50fdc
fedora/1/updates/SRPMS/sharutils-4.2.1-17.3.legacy.src.rpm
1211acde10ecca361e1ac19e72a82fd6dcda10f4
fedora/2/updates/i386/sharutils-4.2.1-18.3.FC2.legacy.i386.rpm
08292d722a234c43a4fd9f0c24c33e36da8a35ed
fedora/2/updates/SRPMS/sharutils-4.2.1-18.3.FC2.legacy.src.rpm

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 lt;filenamegt;

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 lt;filenamegt;

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0990

9. Contact:

The Fedora Legacy security contact is lt;secnotice@fedoralegacy.orggt;. More project details at http://www.fedoralegacy.org


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