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Keycloak has Files or Directories Accessible to External Parties

Moderate severity GitHub Reviewed Published Aug 27, 2022 to the GitHub Advisory Database • Updated Jul 11, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

< 15.1.0

Patched versions

15.1.0

Description

ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.

References

Published by the National Vulnerability Database Aug 26, 2022
Published to the GitHub Advisory Database Aug 27, 2022
Reviewed Sep 2, 2022
Last updated Jul 11, 2023

Severity

Moderate

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
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:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.081%
(36th percentile)

Weaknesses

CVE ID

CVE-2021-3856

GHSA ID

GHSA-3w4v-rvc4-2xpw

Source code

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