CVE-2005-4440

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."

5.0

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.25%

Affected: n/a n/a

References

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

Frequently Asked Questions

What is the severity of CVE-2005-4440?: CVE-2005-4440 has been scored as a medium severity vulnerability.
How to fix CVE-2005-4440?: To fix CVE-2005-4440, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2005-4440 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2005-4440 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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