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nie-ine / inseri

inseri serves as an online collaborative work and publish environment.
https://nie-ine.github.io/inseri
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Bump color-string from 1.5.4 to 1.5.5 #692

Closed dependabot[bot] closed 3 years ago

dependabot[bot] commented 3 years ago

Bumps color-string from 1.5.4 to 1.5.5.

Release notes

Sourced from color-string's releases.

1.5.5 (Patch/Security Release) - hwb() ReDos patch (low-severity)

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.

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