PT-2023-5395 · Keycloak+1 · Keycloak

Dasniko · Published 2023-09-12 · Updated 2023-09-15 · CVE-2023-4918

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description The issue is related to the transmission of data in plain text, allowing a remote attacker to gain access to user credentials. When a user registers through the registration flow, the password and password-confirm fields from the form are stored as regular user attributes. All users and clients with proper rights and roles can read these attributes, enabling a malicious user with minimal access to retrieve users' passwords in clear text. This jeopardizes the environment.

Recommendations For all affected versions, disable self-registration for users in all realms until a patch is available. As a temporary workaround, consider restricting access to user attributes to minimize the risk of exploitation. Avoid using the password and password-confirm fields in the registration flow until the issue is resolved.

Fix

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-256

CWE-319

Related Identifiers

BDU:2023-06025

CVE-2023-4918

GHSA-5Q66-V53Q-PM35

Affected Products

Keycloak

References · 10

• https://github.com/keycloak/keycloak/security/advisories/GHSA-5q66-v53q-pm35 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2023-4918 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2238588 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-4918 · Security Note
• https://osv.dev/vulnerability/CVE-2023-4918 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-5q66-v53q-pm35 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-06025 · Security Note
• https://github.com/keycloak/keycloak · Note
• https://twitter.com/CVEnew/status/1701681536754409540 · Twitter Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4918 · Note