Werk #17094: Fix XSS on SAML login screen

Komponente Setup
Titel Fix XSS on SAML login screen
Datum 05.09.2024
Level Kleine Änderung
Klasse Sicherheitsfix
Kompatibilität Kompatibel - benötigt kein manuelles Eingreifen
Checkmk versions & editions
2.4.0b1 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p16 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p34 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Prior to Werk, attackers could craft URLs that rendered clickable HTML links in the error box on the SAML login page. This could facilitate phishing attacks by tricking users into clicking malicious links.

Links in the error message are now escaped and no longer clickable.

This issue was identified during internal review.

Affected Versions:

  • 2.3.0
  • 2.2.0

Vulnerability Management:

We have rated the issue with a CVSS Score of 5.1 Medium (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N) and assigned CVE-2024-38860.

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