PT-2022-17604 · Shescape · Shescape

Elliot Ward · Published 2022-10-25 · Updated 2025-05-05 · CVE-2022-25918

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions shescape versions 1.5.10 through 1.6.1

Description The issue is related to a Regular Expression Denial of Service (ReDoS) vulnerability via the escape function in index.js, due to the usage of insecure regex in the escapeArgBash function. This affects users who use shescape to escape arguments for the Unix shell Bash or any not-officially-supported Unix shell, using the escape or escapeAll functions with the interpolation option set to true. An attacker can cause polynomial backtracking in terms of the input string length.

Recommendations For shescape versions 1.5.10 through 1.6.1, upgrade to version 1.6.1 to patch the vulnerability. As a temporary workaround, consider enforcing a maximum length on input strings to shescape to reduce the impact of the vulnerability.

Exploit

Fix

DoS

Weakness Enumeration

CWE-1333

Related Identifiers

CVE-2022-25918

GHSA-CR84-XVW4-QX3C

Affected Products

Shescape

References · 11

• 🔥 https://security.snyk.io/vuln/SNYK-JS-SHESCAPE-3061108 · Exploit
• https://github.com/ericcornelissen/shescape/commit/552e8eab56861720b1d4e5474fb65741643358f9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-25918 · Security Note
• https://osv.dev/vulnerability/CVE-2022-25918 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-cr84-xvw4-qx3c · Vendor Advisory
• https://github.com/ericcornelissen/shescape · Note
• https://github.com/ericcornelissen/shescape/blob/main/src/unix.js%23L52 · Note
• https://github.com/ericcornelissen/shescape/releases/tag/v1.6.1 · Note
• https://github.com/ericcornelissen/shescape/security/advisories/GHSA-cr84-xvw4-qx3c · Note
• https://t.me/cvenotify/120865 · Telegram Post
• https://t.me/cibsecurity/52138 · Telegram Post