CVE-2021-3807 in Ansi Regexproject and Oracle Products
Published on September 17, 2021
Inefficient Regular Expression Complexity in chalk/ansi-regex
Weakness Type
What is a ReDoS Vulnerability?
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Some regular expression engines have a feature called "backtracking". If the token cannot match, the engine "backtracks" to a position that may result in a different token that can match. Backtracking becomes a weakness if all of these conditions are met:
CVE-2021-3807 has been classified to as a ReDoS vulnerability or weakness.
Products Associated with CVE-2021-3807
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Affected Versions
chalk/ansi-regex:- Version unspecified and below 6.0.1 is affected.
- Version unspecified and below 5.0.1 is affected.
- Version 5.0.1 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.