search menu icon-carat-right cmu-wordmark

CERT Coordination Center


XMCD vulnerable to arbitrary file overwriting via symlink redirection of temporary file

Vulnerability Note VU#105347

Original Release Date: 2001-11-15 | Last Revised: 2001-11-15

Overview

xmcd is an x11/motif CD playing utility, in the public domain. cda, the command line interface to xmcd, executes with system administrator privileges. It is vulnerable to a symbolic link attack that may allow a local user to obtain administrator privileges.

Description

cda, the command line interface to xmcd, executes with system administrator privileges. It creates insecure temporary files with predictable names in /tmp, a world-writable directory.

Impact

By creating symbolic links with appropriate names, a local attacker may overwrite any writable file on the system. If the attacker can control the content of the overwritten files, elevation of privileges may result.

Solution

Apply vendor patches; see the Systems Affected section below.

Remove the setuid protection from cda.

Vendor Information

105347
Expand all

SuSE

Notified:  August 23, 2001 Updated:  September 24, 2001

Status

  Vulnerable

Vendor Statement

http://www.linuxsecurity.com/advisories/suse_advisory-1532.html

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.

Caldera

Notified:  September 27, 2001 Updated:  September 27, 2001

Status

  Not Vulnerable

Vendor Statement

No currently supported version of Caldera OpenLinux includes the XMCD package.

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.

Debian

Notified:  September 27, 2001 Updated:  September 27, 2001

Status

  Not Vulnerable

Vendor Statement

Debian updated its xmcd package November 21, 2000 to version 2.5pl1-7.1 which removes the the suid flags from all its binaries. Also see associated security advisory for that change at http://www.debian.org/security/2000/20001121a.

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.

IBM

Notified:  September 27, 2001 Updated:  November 15, 2001

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

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.

RedHat

Notified:  September 27, 2001 Updated:  November 15, 2001

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

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.

Sequent

Notified:  September 27, 2001 Updated:  November 15, 2001

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

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.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

This vulnerability was first reported by Paul Starzetz

This document was last modified by Tim Shimeall.

Other Information

CVE IDs: None
Severity Metric: 9.98
Date Public: 2001-08-23
Date First Published: 2001-11-15
Date Last Updated: 2001-11-15 16:22 UTC
Document Revision: 11

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.