PT-2021-20407 · Red Hat · Red Hat Single Sign-On+1

Kristian Klausen + 1 · Published 2021-06-01 · Updated 2022-04-28 · CVE-2021-3424

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Red Hat Single Sign-On version 7.4

Description: A flaw was found in the software where IDN homograph attacks are possible, allowing a malicious user to register with a name already registered and potentially trick an administrator into granting extra privileges.

Recommendations: For Red Hat Single Sign-On version 7.4, at the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2021-3424

GHSA-PF38-CW3P-22Q9

RHSA-2021:2063

RHSA-2021:2064

RHSA-2021:2065

Affected Products

Keycloak

Red Hat Single Sign-On

References · 6

• https://bugzilla.redhat.com/show_bug.cgi?id=1933320 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3424 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3424 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pf38-cw3p-22q9 · Vendor Advisory
• https://github.com/keycloak/keycloak · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3424 · Note