PT-2019-11602 · Red Hat · Keycloak+1

Published 2019-06-12 · Updated 2019-10-09 · CVE-2019-10157

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Keycloak versions prior to 4.8.3 keycloak-connect versions prior to 4.4.0

Description: The issue is related to the improper verification of web tokens received from the server in the backchannel logout process. An attacker with local access could construct a malicious web token by setting an NBF parameter, potentially preventing user access indefinitely. The vulnerability also affects the /k logout route, where the failure to validate JWT signatures allows attackers to logout users and craft malicious JWTs.

Recommendations: For Keycloak versions prior to 4.8.3, upgrade to version 4.8.3 or later. For keycloak-connect versions prior to 4.4.0, upgrade to version 4.4.0 or later. As a temporary workaround, consider restricting access to the /k logout route until a patch is available.

Fix

Insufficient Verification of Data Authenticity

Improper Authentication

Weakness Enumeration

CWE-345

CWE-287

Related Identifiers

CVE-2019-10157

GHSA-68HW-VFH7-XVG8

Affected Products

Keycloak

Keycloak-Connect

References · 9

• https://osv.dev/vulnerability/CVE-2019-10157 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-10157 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10157 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-68hw-vfh7-xvg8 · Vendor Advisory
• https://github.com/keycloak/keycloak-nodejs-connect/commit/55e54b55d05ba636bc125a8f3d39f0052d13f8f6 · Note
• https://npmjs.com/advisories/978 · Note
• http://securityfocus.com/bid/108734 · Note
• https://snyk.io/vuln/SNYK-JS-KEYCLOAKNODEJSCONNECT-449920 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10157 · Note