kernel-utils sets insecure permissions on "uml_net" utility

Overview

The uml_net utility, part of the kernel-utils package in Red Hat Linux 8.0, was shipped with incorrect permissions.

Description

User-Mode Linux (UML) is a tool to provide a virtual machine in which to run another copy of Linux. In Red Hat linux 8.0, the kernel-utils package contains the UML utilities. One of the UML utilities, uml_net, was incorrectly shipped setuid root.

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Impact

Local users could control network interfaces, put interfaces into promiscuous mode, and add and remove arp entries and routes.

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Solution

Apply a patch as described in the Red Hat bulletin. If a patch cannot be applied, you can remove the suid bit from the uml_net package with the following command:

chmod -s /usr/bin/uml_net

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Vendor Information

134025

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Red Hat Inc. __ Affected

Notified: February 07, 2003 Updated: February 11, 2003

Status

Affected

Vendor Statement

See <https://rhn.redhat.com/errata/RHSA-2003-056.html&gt;.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23134025 Feedback>).

CVSS Metrics

Group	Score	Vector
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Temporal
Environmental

References

• <https://rhn.redhat.com/errata/RHSA-2003-056.html&gt;
• <https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=83685&gt;
• <http://user-mode-linux.sourceforge.net/&gt;
• <http://lwn.net/Vulnerabilities/22202/&gt;
• <http://online.securityfocus.com/advisories/4951&gt;
• <http://www.uniras.gov.uk/l1/l2/l3/brief2003/Brief - 7303.txt&gt;

Acknowledgements

Red Hat has credited Johny Robertson for discovering this issue.

This document was written by Shawn Hernan based on information provided by Red Hat and other sources.

Other Information

CVE IDs:	CVE-2003-0019
Severity Metric:	15.82 Date Public: