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Prototype pollution in matrix-js-sdk (part 2)

High severity GitHub Reviewed Published Mar 28, 2023 in matrix-org/matrix-js-sdk • Updated May 30, 2023

Package

npm matrix-js-sdk (npm)

Affected versions

< 24.0.0

Patched versions

24.0.0

Description

Impact

In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-js-sdk functionality, causing denial of service and potentially affecting program logic.

(This is part 2, where CVE-2022-36059 / GHSA-rfv9-x7hh-xc32 is part 1. Part 2 covers remaining vectors not covered by part 1, found in a codebase audit scheduled after part 1.)

Patches

The issue has been patched in matrix-js-sdk 24.0.0.

Workarounds

None.

References

  • Release blog post
  • The advisory GHSA-rfv9-x7hh-xc32 (CVE-2022-36059) refers to an initial set of vulnerable locations discovered and patched in matrix-js-sdk 19.4.0. We opted not to disclose that advisory while we performed an audit of the codebase and are now disclosing it jointly with this one.

For more information

If you have any questions or comments about this advisory please email us at security at matrix.org.

References

@dkasak dkasak published to matrix-org/matrix-js-sdk Mar 28, 2023
Published by the National Vulnerability Database Mar 28, 2023
Published to the GitHub Advisory Database Mar 30, 2023
Reviewed Mar 30, 2023
Last updated May 30, 2023

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
Unchanged
Confidentiality
None
Integrity
Low
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:U/C:N/I:L/A:H

EPSS score

0.643%
(80th percentile)

Weaknesses

CVE ID

CVE-2023-28427

GHSA ID

GHSA-mwq8-fjpf-c2gr

Source code

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