Paper/Archive/CVE-2022-23131

CVE-2022-23131

Zabbix Frontend — Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML

KEV · due 8 Mar EPSS 96%public exploit SSVC act CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (CNA)9.1 / 10 × 3027.3 In CISA KEV+3030.0 EPSS percentile 99.9.999 × 2020.0 Exploit: SSVC active+1010.0 SSVC exploitation: active+1010.0

Description · from the CVE record

In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified. Malicious unauthenticated actor may exploit this issue to escalate privileges and gain admin access to Zabbix Frontend. To perform the attack, SAML authentication is required to be enabled and the actor has to know the username of Zabbix user (or use the guest account, which is disabled by default).

Affected

ProductAffectedFixed inSource

Frontend5.4.0 - 5.4.85.4.9CNA

Scores by source

Zabbix (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refsupport.zabbix.com/browse/ZBX-20350 refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-23131 kevcisa.gov/known-exploited-vulnerabilities-catalog