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Fedora Legacy Update AdvisorySynopsis: 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 ---------------------------------------------------------------------
--------------------------------------------------------------------- 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:
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:
http://bugzilla.fedora.us - bug #2272 - unarj - buffer overflow and path traversal bugs
6. RPMs required:
Red Hat Linux 7.3:
SRPM: http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/unarj-2.63a-4.0.7.3.1.legacy.src.rpm
i386: http://download.fedoralegacy.org/redhat/7.3/updates/i386/unarj-2.63a-4.0.7.3.1.legacy.i386.rpm
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
Fedora Core 1:
SRPM: http://download.fedoralegacy.org/fedora/1/updates/SRPMS/unarj-2.63a-4.1.1.legacy.src.rpm
i386: http://download.fedoralegacy.org/fedora/1/updates/i386/unarj-2.63a-4.1.1.legacy.i386.rpm
7. Verification:
SHA1 sum Package Name ---------------------------------------------------------------------
8b07f5d8a514324da4097fa5e5fe45ab693fba54 redhat/7.3/updates/i386/unarj-2.63a-4.0.7.3.1.legacy.i386.rpm
07a12c321015017d0813cb107758df017119d9ac redhat/7.3/updates/SRPMS/unarj-2.63a-4.0.7.3.1.legacy.src.rpm
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
ea630f037afc90ab60cc85e230b64e54141535c9 fedora/1/updates/i386/unarj-2.63a-4.1.1.legacy.i386.rpm
d44d03bc24fc9459bd0bd4ed42d7802ca53d74c3 fedora/1/updates/SRPMS/unarj-2.63a-4.1.1.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 <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://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0947 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1027
9. Contact:
The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. More project details at http://www.fedoralegacy.org
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