CyberSecBulletin
CVE-2024-8698NVD status: Deferred

Red Hat Build of Keycloak: Improper Verification of Cryptographic Signature

Published Updated By the CyberSecBulletin desk

CVE-2024-8698 is a high-severity improper verification of cryptographic signature vulnerability in Red Hat Build of Keycloak from Red Hat, with a CVSS 3.1 base score of 7.7 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 2.03% chance of exploitation within 30 days, higher than 81% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Red Hat Build of Keycloak you run against the affected versions below, and install the vendor's latest release.

Affected products and versions

VendorProductAffected versionsFixed in
Red HatRed Hat Build of KeycloakNot specified in the recordNot stated
Red HatRed Hat build of Keycloak 22Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 24Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 7Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 8Not specified in the recordNot stated
Red HatRed Hat Single Sign-On 7.6 for RHEL 9Not specified in the recordNot stated
Red HatRHEL-8 based Middleware ContainersNot specified in the recordNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
HighAll data handled by the component can be read.
Integrity
LowLimited modification of data is possible.
Availability
LowPerformance or availability is reduced.

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L. Scored by CNA (redhat.com).

Official description

A flaw exists in the SAML signature validation method within the Keycloak XMLSignatureUtil class. The method incorrectly determines whether a SAML signature is for the full document or only for specific assertions based on the position of the signature in the XML document, rather than the Reference element used to specify the signed element. This flaw allows attackers to create crafted responses that can bypass the validation, potentially leading to privilege escalation or impersonation attacks.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Red Hat Build of Keycloak

All Red Hat Build of Keycloak vulnerabilities

Recent Improper Verification of Cryptographic Signature vulnerabilities

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