CVE-2022-36064
An Inefficient Regular Expression Complexity vulnerability impacts users that use Shescape to escape arguments for the Unix shells `Bash` and `Dash`, or any not-officially-supported Unix shell; and/or using the `escape` or `escapeAll` functions with the…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Shescape is a shell escape package for JavaScript. An Inefficient Regular Expression Complexity vulnerability impacts users that use Shescape to escape arguments for the Unix shells `Bash` and `Dash`, or any not-officially-supported Unix shell; and/or using the `escape` or `escapeAll` functions with the `interpolation` option set to `true`. An attacker can cause polynomial backtracking or quadratic runtime in terms of the input string length due to two Regular Expressions in Shescape that are vulnerable to Regular Expression Denial of Service (ReDoS). This bug has been patched in v1.5.10. For `Dash` only, this bug has been patched since v1.5.9. As a workaround, a maximum length can be enforced on input strings to Shescape to reduce the impact of the vulnerability. It is not recommended to try and detect vulnerable input strings, as the logic for this may end up being vulnerable to ReDoS itself.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.40% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-1333
- Affected
- shescape project/shescape
- Source
- security-advisories@github.com
References
- https://github.com/ericcornelissen/shescape/pull/373Issue Tracking, Patch, Third Party Advisory
- https://github.com/ericcornelissen/shescape/releases/tag/v1.5.10Release Notes, Third Party Advisory
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gp75-h7j6-5pv3Exploit, Issue Tracking, Mitigation, Third Party Advisory
- https://github.com/ericcornelissen/shescape/pull/373Issue Tracking, Patch, Third Party Advisory
- https://github.com/ericcornelissen/shescape/releases/tag/v1.5.10Release Notes, Third Party Advisory
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gp75-h7j6-5pv3Exploit, Issue Tracking, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.