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CVE-2005-4440

UnknownEPSS 1.61%

Last modified

CVE-2005-4440 is a vulnerability of currently unknown severity. 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 estimates a 1.61% chance of exploitation in the next 30 days.

Description

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."

Metrics

EPSS Probability
1.61%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
Vlan ProtocolVlan Protocol802.1q

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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."
How severe is CVE-2005-4440?
Severity scoring for CVE-2005-4440 is pending analysis. The EPSS model estimates a 1.61% probability of exploitation in the next 30 days.
How do I fix CVE-2005-4440?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST