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keycloak-core vulnerable to timing attacks against JWS token verification

Moderate severity GitHub Reviewed Published Oct 18, 2018 to the GitHub Advisory Database • Updated Sep 7, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

< 2.5.1

Patched versions

2.5.1

Description

Red Hat Keycloak before version 2.5.1 has an implementation of HMAC verification for JWS tokens that uses a method that runs in non-constant time, potentially leaving the application vulnerable to timing attacks.

References

Published to the GitHub Advisory Database Oct 18, 2018
Reviewed Jun 16, 2020
Last updated Sep 7, 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
High
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:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.394%
(74th percentile)

Weaknesses

CVE ID

CVE-2017-2585

GHSA ID

GHSA-w6gv-3r3v-gwgj

Source code

No known source code
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