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Sandbox Breakout in realms-shim

Critical severity GitHub Reviewed Published Oct 2, 2019 in Agoric/realms-shim • Updated Jan 9, 2023

Package

npm realms-shim (npm)

Affected versions

< 1.2.0

Patched versions

1.2.0
npm ses (npm)
< 0.6.3
0.6.3

Description

Versions of realms-shim prior to 1.2.0 are vulnerable to a Sandbox Breakout. Reflect.construct can be used on the sandboxed Function constructor to reach the prototypes of the primal Realm, which may allow an attacker to escape the sandbox and execute arbitrary code.

Recommendation

Upgrade to version 1.2.0 or later.

References

@warner warner published to Agoric/realms-shim Oct 2, 2019
Published to the GitHub Advisory Database Oct 4, 2019
Reviewed Jun 16, 2020
Last updated Jan 9, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

No CWEs

CVE ID

No known CVE

GHSA ID

GHSA-6jg8-7333-554w

Source code

Checking history
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