Description
Shescape is a simple shell escape library for JavaScript. From 2.1.11 until 2.1.14 and 3.0.1, the flag-protection loop in compose in src/internal/compose.js repeatedly joins and slices flag fragments when flagProtection is enabled, which is the default, making processing quadratic in input size across the escape, escapeAll, quote, and quoteAll APIs. An attacker who can supply a large untrusted input containing many flag fragments can consume CPU and cause denial of service. This issue is fixed in versions 2.1.14 and 3.0.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
ericcornelissen shescape
>= 2.1.11, < 2.1.14affected>= 3.0.0, < 3.0.1affected
References
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gm3r-q2wp-hw87 ↗
- https://github.com/ericcornelissen/shescape/pull/2649 ↗
- https://github.com/ericcornelissen/shescape/pull/2651 ↗
- https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de ↗
- https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f ↗
- https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14 ↗
- https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1 ↗