CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:H/Au:N/C:N/I:P/A:N
EPSS
Percentile
5.1%
gpm version 1.19.3, which usually runs as root, is vulnerable due to a flaw that allows a local user to exploit a race condition to corrupt files that gpm uses.
gpm (General Purpose Mouse) is a program that lets you use the mouse in console mode when not using XWindows. It is usually included in Linux distributions, and can be started from the command line or in the startup script /etc/rc.d/rc.local. A vulnerability in gpm version 1.19.3 allows a local user to exploit a race condition to corrupt files that gpm uses. The flaw exists because gpm creates files in the /tmp directory using predictable filenames without checking whether a file with that name already exists. Malicious local users can therefore create a symbolic link to a file that will be used by gpm. When gpm is run, the creation of the file fails (since it already exists) and gpm uses the symbolically linked file for its processing. The malicious user can then overwrite or append to the file as it is being used by the privileged gpm program.
Malicious users can destroy the integrity of or deny access to files processed by gpm, which usually runs as root.
Upgrade affected Linux distributions.
426456
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Notified: January 10, 2001 Updated: June 01, 2001
Affected
Immunix reports on their vulnerability to this flaw at <http://download.immunix.org/ImmunixOS/7.0-beta/updates/IMNX-2000-70-016-01>.
The vendor has not provided us with any further information regarding this vulnerability.
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%23426456 Feedback>).
Notified: January 12, 2001 Updated: June 01, 2001
Affected
MandrakeSoft reports on their vulnerability to this flaw at <http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-006.php3?dis=6>.
The vendor has not provided us with any further information regarding this vulnerability.
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%23426456 Feedback>).
Notified: January 10, 2001 Updated: June 01, 2001
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Immunix reported that their vulnerability to this flaw was inherited from Red Hat Linux, since they build from that base. Therefore, Red Hat Linux 7.0 is vulnerable.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23426456 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
Thanks to Greg Kroah-Hartman of WireX for discovering this vulnerability. Thanks also to BugTraq for a good description of the underlying problem.
This document was written by Andy Moore.
CVE IDs: | CVE-2001-0116 |
---|---|
Severity Metric: | 2.66 Date Public: |