Critical severity · published Jan 13, 2022
CVE-2022-23131
Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML
In wildKEV
9.8
CVSS
95.7%
EPSS
Yes
On KEV
Description
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)95.7% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Feb 22, 2022
Federal remediation dueMar 8, 2022
Ransomware campaign useNot known
Affected products
Which versions
ZA
Zabbix · Zabbix
5.4.0 - 5.4.8 · source: vendor, NVD, KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-23131
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-23131
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://support.zabbix.com/browse/ZBX-20350
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