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."
- EPSS
- 1.6% chance of exploitation in the next 30 days; higher than 75% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- 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
- http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040333.html
- http://www.securityfocus.com/archive/1/419831/100/0/threaded