CVE-2022-23131

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

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).

Remediation

Solution:

  • To remediate this vulnerability, install the updates or if an immediate update is not possible, follow the presented workarounds.

Workaround:

  • Disable SAML authentication

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.34% Top 5%
KEV Since 
Vendor Advisory zabbix.com
Affected: Zabbix Frontend
Published at:
Updated at:

References

Link Tags
https://support.zabbix.com/browse/ZBX-20350 patch vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2022-23131?
CVE-2022-23131 has been scored as a critical severity vulnerability.
How to fix CVE-2022-23131?
To fix CVE-2022-23131: To remediate this vulnerability, install the updates or if an immediate update is not possible, follow the presented workarounds.
Is CVE-2022-23131 being actively exploited in the wild?
It is confirmed that CVE-2022-23131 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-23131?
CVE-2022-23131 affects Zabbix Frontend.
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