5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.933 High
EPSS
Percentile
99.1%
Ethereal fails to properly parse Pragmatic General Multicast (PGM) packets containing a crafted negative acknowledgement (NAK) list.
Ethereal is a network traffic analysis package. It includes the ability to decode packets containing PGM data. There is a vulnerability in the way the PGM protocol dissector parses PGM data containing a crafted NAK list.
According to the e-matters Security Advisory:
“When parsing an PGM packet with a carefully crafted NakList a possible integer underflow can result in a very small stack-overflow. Due to the stacklayout code execution exploitation seems very unlikely.”
A remote, unauthenticated attacker could cause Ethereal to crash or possibly execute arbitrary code on the vulnerable system.
Upgrade
Upgrade to version 0.10.3 or later.
Note: Ethereal is considered BETA software at this time.
Disable Dissector
If you are unable to upgrade to version 0.10.3 or later, you can disable the PGM protocol dissector by performing the following actions in Ethereal:
(for Ethereal versions 0.8.x and 0.9.x)
(for Ethereal versions 0.10.x)
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Updated: March 24, 2004
Affected
Please see the Ethereal Security Bulletin at <http://www.ethereal.com/appnotes/enpa-sa-00013.html>.
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%23433596 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
Ethereal credits Stefan Esser for reporting this vulnerability.
This document was written by Damon Morda.
CVE IDs: | CVE-2004-0176 |
---|---|
Severity Metric: | 4.04 Date Public: |