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CasaOS contains weak JWT secrets

Critical severity GitHub Reviewed Published Jul 17, 2023 in IceWhaleTech/CasaOS • Updated Nov 11, 2023

Package

gomod github.com/IceWhaleTech/CasaOS (Go)

Affected versions

< 0.4.4

Patched versions

0.4.4

Description

Impact

Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances.

Patches

The problem was addressed by improving the validation of JWTs in 705bf1f. This patch is part of CasaOS 0.4.4.

Workarounds

Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.

References

References

@tigerinus tigerinus published to IceWhaleTech/CasaOS Jul 17, 2023
Published to the GitHub Advisory Database Jul 17, 2023
Reviewed Jul 17, 2023
Published by the National Vulnerability Database Jul 17, 2023
Last updated Nov 11, 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

3.648%
(92nd percentile)

Weaknesses

CVE ID

CVE-2023-37266

GHSA ID

GHSA-m5q5-8mfw-p2hr

Source code

Credits

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