Improper Handling of Additional Special Element Affecting freebsd package, versions [0,]


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.13% (50th percentile)

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  • Snyk IDSNYK-UNMANAGED-FREEBSD-5891152
  • published11 Sept 2023
  • disclosed10 Sept 2023
  • creditEnrico Bassetti

Introduced: 10 Sep 2023

CVE-2023-4809  (opens in a new tab)
CWE-167  (opens in a new tab)

How to fix?

A fix was pushed into the master branch but not yet published.

Overview

Affected versions of this package are vulnerable to Improper Handling of Additional Special Element via the pf component due to improper validation of user requests by the scrub fragment reassemble feature. By sending a packet containing multiple IPv6 fragment headers, an attacker can bypass the firewall rules.

References

CVSS Scores

version 3.1