Release notes copied verbatim from the commit message, which can be found here: 0789e21284c33d89ebc4ab4ca6f759b9375ac9d3
Discovered by Yeting Li, c/o Colin Ife via Snyk.io.
A ReDos (Regular Expression Denial of Service) vulnerability
was responsibly disclosed to me via email by Colin on
Mar 5 2021 regarding an exponential time complexity for
linearly increasing input lengths for hwb() color strings.
Strings reaching more than 5000 characters would see several
milliseconds of processing time; strings reaching more than
50,000 characters began seeing 1500ms (1.5s) of processing time.
The cause was due to a the regular expression that parses
hwb() strings - specifically, the hue value - where
the integer portion of the hue value used a 0-or-more quantifier
shortly thereafter followed by a 1-or-more quantifier.
This caused excessive backtracking and a cartesian scan,
resulting in exponential time complexity given a linear
increase in input length.
Thank you Yeting Li and Colin Ife for bringing this to my
attention in a secure, responsible and professional manner.
A CVE will not be assigned for this vulnerability.
1.5.4 (Patch Release)
Removes rounding of alpha values in RGBA hex (#rrggbbaa) and condensed-hex (#rgba) parsers, which caused certain unique inputs to result in identical outputs (see https://github.com/qix-/color/issues/174).
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Bumps color-string from 1.5.2 to 1.6.0.
Release notes
Sourced from color-string's releases.
Commits
1a68f9e1.6.02b6f59cAdd additional HSL examples to README6f73e20Update HSL regular expression0264546Add tests for space-separated HSL syntax966ae4d1.5.50789e21fix ReDos in hwb() parser (low-severity)60f3f661.5.46f7d6f1don't fix alpha to 2 decimal points (ref qix-/color#174)ad1e5111.5.338f6424Adding missing export definition (#38)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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