CVE-2005-4440

The 802.1q VLAN protocol allows remote attackers to bypass network segmentation and spoof VLAN traffic via a message with two 802.1q tags, which causes the second tag to be redirected from a downstream switch after the first tag has been stripped, as demonstrated by Yersinia, aka "double-tagging VLAN jumping attack."

Score

CVSS 2.0 5.0 Medium

Status

Modified - cve@mitre.org

Published

2005-12-21

Last modified

2024-08-07

Affected products

• Vlan Protocol (Vlan Protocol)

References

• http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040333.html
• http://www.securityfocus.com/archive/1/419831/100/0/threaded
• http://www.securityfocus.com/archive/1/419834/100/0/threaded