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Sandbox Breakout / Arbitrary Code Execution in safer-eval

Critical severity GitHub Reviewed Published Oct 21, 2019 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

npm safer-eval (npm)

Affected versions

< 1.3.4

Patched versions

1.3.4

Description

Versions of safer-eval prior to 1.3.4 are vulnerable to Sandbox Escape leading to Remote Code Execution. A payload using constructor properties can escape the sandbox and execute arbitrary code. For example, evaluating he string console.constructor.constructor('return process')().env prints process.env to the console.

Recommendation

Upgrade to version 1.3.4 or later.

References

Published by the National Vulnerability Database Oct 15, 2019
Reviewed Oct 17, 2019
Published to the GitHub Advisory Database Oct 21, 2019
Last updated Feb 1, 2023

Severity

Critical
10.0
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2019-10759

GHSA ID

GHSA-r3x4-wr4h-pw33

Source code

No known source code
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