PT-2019-20020 · Realms · Realms-Shim

Published 2019-10-21 · Updated 2019-10-21

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions realms-shim versions prior to 1.2.1

Description The issue concerns a Sandbox Breakout in the Realms evaluation function, which has an option to apply transformations to the source code before evaluation. A part of this transformation pipeline exposed a primal-Realm object to the rewriting function, allowing confined code to capture this object using a malicious rewriter function and breach the sandbox.

Recommendations Upgrade to version 1.2.1 or later.

Fix

Related Identifiers

GHSA-7CG8-PQ9V-X98Q

Affected Products

Realms-Shim

References · 6

• https://osv.dev/vulnerability/GHSA-7cg8-pq9v-x98q · Vendor Advisory
• https://github.com/Agoric/realms-shim/security/advisories/GHSA-7cg8-pq9v-x98q · Note
• https://github.com/Agoric/realms-shim · Note
• https://github.com/advisories/GHSA-7cg8-pq9v-x98q · Note
• https://snyk.io/vuln/SNYK-JS-REALMSSHIM-536069 · Note
• https://npmjs.com/advisories/1218 · Note