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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:
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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