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Prototype Pollution leading to Remote Code Execution in superjson

Critical severity GitHub Reviewed Published Feb 9, 2022 in flightcontrolhq/superjson • Updated Nov 1, 2023

Package

npm blitz (npm)

Affected versions

< 0.45.3

Patched versions

0.45.3
npm superjson (npm)
< 1.8.1
1.8.1

Description

Impact

This is critical vulnerability, as it allows to run arbitrary code on any server using superjson input, including a Blitz.js server, without prior authentication or knowledge. Attackers gain full control over the server so they could steal and manipulate data or attack further systems. The only requirement is that the server implements at least one endpoint which uses superjson during request processing. In the case of Blitz.js, it would be at least one RPC call.

Patches

This has been patched in superjson 1.8.1 and Blitz.js 0.45.3.

If you are unable to upgrade to Blitz.js 0.45.3 in a timely manner, you can instead upgrade only superjson to version 1.8.1 using yarn resolutions are similar. Blitz versions < 0.45.3 are only affected because they used superjson versions < 1.8.1.

Workarounds

None

For more information

If you have any questions or comments about this advisory:

References

References

@flybayer flybayer published to flightcontrolhq/superjson Feb 9, 2022
Published by the National Vulnerability Database Feb 9, 2022
Published to the GitHub Advisory Database Feb 9, 2022
Reviewed Feb 9, 2022
Last updated Nov 1, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS score

0.613%
(79th percentile)

Weaknesses

CVE ID

CVE-2022-23631

GHSA ID

GHSA-5888-ffcr-r425

Source code

Credits

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