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Clojure classes can be used to craft a serialized object that runs arbitrary code on deserialization

Critical severity GitHub Reviewed Published Jan 22, 2024 to the GitHub Advisory Database • Updated Jan 31, 2024

Package

maven org.clojure:clojure (Maven)

Affected versions

< 1.9.0

Patched versions

1.9.0

Description

In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.

References

Published by the National Vulnerability Database Jan 22, 2024
Published to the GitHub Advisory Database Jan 22, 2024
Reviewed Jan 22, 2024
Last updated Jan 31, 2024

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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
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:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.072%
(33rd percentile)

Weaknesses

CVE ID

CVE-2017-20189

GHSA ID

GHSA-jgxc-8mwq-9xqw

Source code

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