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Advisories

anchorme through 3.0.8 Regular Expression Denial of Service

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severity
high
date
Affecting

  • anchorme <= 3.0.8

CWE
  • CWE-1333 Inefficient Regular Expression Complexity
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Mario Madersbacher
Description
anchorme through 3.0.8 contains a regular expression denial of service vulnerability in the IPv6 host extraction regex due to catastrophic backtracking. Attackers can supply specially crafted input strings with repeated patterns to cause exponential regex engine backtracking, blocking the Node.js event loop and denying service to other requests.

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