CVE-2022-36064 - Shescape Inefficient Regular Expression Complexity vulnerability

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HIGH

Shescape Inefficient Regular Expression Complexity vulnerability

Published Sep 6, 2022

7.5

HIGH

CVSS 3.1

EPSS 1.43%

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.

Affected products

Vendor Ericcornelissen Product Shescape Default
n/a
- Version
  >= 1.5.1, < 1.5.10
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Ericcornelissen

Shescape

n/a

Version	Status	Constraints
>= 1.5.1, < 1.5.10	affected	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-1333

CWE-400

Uncontrolled Resource Consumption

References (3)

https://github.com/ericcornelissen/shescape/pull/373
x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/ericcornelissen/shescape/releases/tag/v1.5.10
x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gp75-h7j6-5pv3
x_refsource_CONFIRMExploitIssue TrackingMitigationThird Party Advisory

Link	Providers	Tags
https://github.com/ericcornelissen/shescape/pull/373		x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/ericcornelissen/shescape/releases/tag/v1.5.10		x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gp75-h7j6-5pv3		x_refsource_CONFIRMExploitIssue TrackingMitigationThird Party Advisory