The package postcss before 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and loadAnnotation() in lib/previous-map.js. The vulnerable regexes are caused mainly by the sub-pattern /s sourceMappingURL=(.*).
Weakness
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Postcss | Postcss | * | 7.0.36 (excluding) |
| Postcss | Postcss | 8.0.0 (including) | 8.2.13 (excluding) |
| Red Hat OpenShift Container Platform 4.8 | RedHat | openshift4/ose-console:v4.8.0-202107010336.p0.git.188a490.assembly.stream | * |
| Red Hat Quay 3 | RedHat | quay/quay-rhel8:v3.6.0-62 | * |
| Node-postcss | Ubuntu | focal | * |
| Node-postcss | Ubuntu | groovy | * |
| Node-postcss | Ubuntu | hirsute | * |
| Node-postcss | Ubuntu | impish | * |
| Node-postcss | Ubuntu | kinetic | * |
| Node-postcss | Ubuntu | trusty | * |
| Node-postcss | Ubuntu | upstream | * |
Extended Description
Attackers can create crafted inputs that
intentionally cause the regular expression to use
excessive backtracking in a way that causes the CPU
consumption to spike.
Potential Mitigations
Related Attack Patterns
References
- https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
- https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640