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msgpackr's conversion of property names to strings can trigger infinite recursion

High severity GitHub Reviewed Published Dec 28, 2023 in kriszyp/msgpackr • Updated Jan 10, 2024

Package

npm msgpackr (npm)

Affected versions

< 1.10.1

Patched versions

1.10.1

Description

Impact

When decoding user supplied MessagePack messages, users can trigger stuck threads by crafting messages that keep the decoder stuck in a loop.

Patches

The fix is available in v1.10.1

Workarounds

Exploits seem to require structured cloning, replacing the 0x70 extension with your own (that throws an error or does something other than recursive referencing) should mitigate the issue.

References

References

@kriszyp kriszyp published to kriszyp/msgpackr Dec 28, 2023
Published by the National Vulnerability Database Dec 28, 2023
Published to the GitHub Advisory Database Dec 28, 2023
Reviewed Dec 28, 2023
Last updated Jan 10, 2024

Severity

High

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
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
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:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS score

0.044%
(14th percentile)

Weaknesses

CVE ID

CVE-2023-52079

GHSA ID

GHSA-7hpj-7hhx-2fgx

Source code

Credits

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