Vulnerability · Published Jun 1, 2021 · Assigned by redhat

CVE-2021-3424

Medium 5.3

In plain English

A medium-severity improper authentication in keycloak. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.3Medium

Exploit odds (30 days)0.8%top 44.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A flaw was found in keycloak as shipped in Red Hat Single Sign-On 7.4 where IDN homograph attacks are possible. A malicious user can register himself with a name already registered and trick admin to grant him extra privileges.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.keycloak:keycloak-services	18.0.0	GHSA-pf38-cw3p-22q9

Affected products (as reported)

Vendor	Product	Versions
n/a	keycloak	as shipped in Red Hat Single Sign-On 7.4

Weakness: CWE-287

References

https://bugzilla.redhat.com/show_bug.cgi?id=1933320 x_refsource_MISC