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mike_m
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 Posted: Sat Mar 05, 2005 2:25 am Post subject: 9k Update 2005-02-01: Updated unarj |
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Fedora Legacy Update Advisory
Synopsis: Updated unarj package fixes security issue
Advisory ID: FLSA:2272
Issue date: 2005-02-01
Product: Red Hat Linux, Fedora Core
Keywords: Bugfix
Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=2272
CVE Names: CAN-2004-0947 CAN-2004-1027
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1. Topic:
An updated unarj package that fixes a buffer overflow vulnerability and
a directory traversal vulnerability is now available.
The unarj program is an archiving utility which can extract
ARJ-compatible archives.
2. Relevant releases/architectures:
Red Hat Linux 7.3 - i386
Red Hat Linux 9 - i386
Fedora Core 1 - i386
3. Problem description:
A buffer overflow bug was discovered in unarj when handling long file
names contained in an archive. An attacker could create a specially
crafted archive which could cause unarj to crash or possibly execute
arbitrary code when extracted by a victim. The Common Vulnerabilities
and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0947 to this issue.
Additionally, a path traversal vulnerability was discovered in unarj. An
attacker could create a specially crafted archive which would create
files in the parent (”..”) directory when extracted by a victim. When
used recursively, this vulnerability could be used to overwrite critical
system files and programs. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CAN-2004-1027 to this
issue.
Users of unarj should upgrade to this updated package which contains
backported patches and is not vulnerable to 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:
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:
http://bugzilla.fedora.us - bug #2272 - unarj - buffer overflow and path
traversal bugs
6. RPMs required:
Red Hat Linux 9:
SRPM:
http://download.fedoralegacy.org/redhat/9/updates/SRPMS/unarj-2.63a-4.0.9.1.legacy.src.rpm
i386:
http://download.fedoralegacy.org/redhat/9/updates/i386/unarj-2.63a-4.0.9.1.legacy.i386.rpm
7. Verification:
SHA1 sum Package Name
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a6151b99a058e254d76de4fe73b769fe0978f851 redhat/9/updates/i386/unarj-2.63a-4.0.9.1.legacy.i386.rpm
b88dc2c7dad960fdf9fe5392ef4715deca699287 redhat/9/updates/SRPMS/unarj-2.63a-4.0.9.1.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
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
8. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0947
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1027
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