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CasaOS-UserService allows unauthorized access to any file

High severity GitHub Reviewed Published Mar 6, 2024 in IceWhaleTech/CasaOS-UserService • Updated Mar 12, 2024

Package

gomod github.com/IceWhaleTech/CasaOS-UserService (Go)

Affected versions

< 0.4.7

Patched versions

0.4.7

Description

Summary

http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/1/avatar.png

Originally it was to get the url of the user's avatar, but the path filtering was not strict, making it possible to get any file on the system.

Details

Construct paths to get any file.

Such as the CasaOS user database, and furthermore can obtain system root privileges.

PoC

http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/conf/../db/user.db

Impact

v0.4.6 all previous versions

References

@tigerinus tigerinus published to IceWhaleTech/CasaOS-UserService Mar 6, 2024
Published to the GitHub Advisory Database Mar 6, 2024
Reviewed Mar 6, 2024
Published by the National Vulnerability Database Mar 6, 2024
Last updated Mar 12, 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
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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:N/A:N

EPSS score

0.045%
(17th percentile)

Weaknesses

CVE ID

CVE-2024-24765

GHSA ID

GHSA-h5gf-cmm8-cg7c

Source code

Credits

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