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Scala subject to file deletion, code execution due to Java deserialization chain with LazyList object deserialization

Critical severity GitHub Reviewed Published Sep 25, 2022 to the GitHub Advisory Database • Updated Jan 31, 2023

Package

maven org.scala-lang:scala-library (Maven)

Affected versions

>= 2.13.0, < 2.13.9

Patched versions

2.13.9

Description

Scala 2.13.x before 2.13.9 has a Java deserialization chain in its JAR file. On its own, it cannot be exploited. There is only a risk in conjunction with LazyList object deserialization within an application. In such situations, it allows attackers to erase contents of arbitrary files, make network connections, or possibly run arbitrary code (specifically, Function0 functions) via a gadget chain.

References

Published by the National Vulnerability Database Sep 23, 2022
Published to the GitHub Advisory Database Sep 25, 2022
Reviewed Sep 28, 2022
Last updated Jan 31, 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
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

0.752%
(81st percentile)

Weaknesses

CVE ID

CVE-2022-36944

GHSA ID

GHSA-8qv5-68g4-248j

Source code

Credits

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