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Known Exploited Vulnerabilities CVE-2022-23131 Mappings

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).

Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
CVE-2022-23131 Zabbix Frontend Authentication Bypass Vulnerability secondary_impact T1078 Valid Accounts
Comments
This vulnerability is exploited by a malicious actor via improper validation via SAML to modify session data and escalate privileges to gain admin access to the Zabbix Frontend. This allows attackers to control the saml_data[username_attribute] value. This flaw enables unauthenticated users to bypass authentication and access the Zabbix dashboard as a highly-privileged user, such as the default "Admin" user. Additionally, incorrect handling of Zabbix installer files permits unauthenticated users to access and reconfigure servers.
References
  1. https://www.sonarsource.com/blog/zabbix-case-study-of-unsafe-session-storage/
  2. https://therecord.media/cisa-zabbix-servers-under-attack-with-recently-disclosed-vulnerability
  3. https://www.bleepingcomputer.com/news/security/cisa-warns-of-actively-exploited-vulnerabilities-in-zabbix-servers/
CVE-2022-23131 Zabbix Frontend Authentication Bypass Vulnerability secondary_impact T1059 Command and Scripting Interpreter
Comments
This vulnerability is exploited by a malicious actor via improper validation via SAML to modify session data and escalate privileges to gain admin access to the Zabbix Frontend. This allows attackers to control the saml_data[username_attribute] value. This flaw enables unauthenticated users to bypass authentication and access the Zabbix dashboard as a highly-privileged user, such as the default "Admin" user. Additionally, incorrect handling of Zabbix installer files permits unauthenticated users to access and reconfigure servers.
References
  1. https://www.sonarsource.com/blog/zabbix-case-study-of-unsafe-session-storage/
  2. https://therecord.media/cisa-zabbix-servers-under-attack-with-recently-disclosed-vulnerability
  3. https://www.bleepingcomputer.com/news/security/cisa-warns-of-actively-exploited-vulnerabilities-in-zabbix-servers/
CVE-2022-23131 Zabbix Frontend Authentication Bypass Vulnerability primary_impact T1548 Abuse Elevation Control Mechanism
Comments
This vulnerability is exploited by a malicious actor via improper validation via SAML to modify session data and escalate privileges to gain admin access to the Zabbix Frontend. This allows attackers to control the saml_data[username_attribute] value. This flaw enables unauthenticated users to bypass authentication and access the Zabbix dashboard as a highly-privileged user, such as the default "Admin" user. Additionally, incorrect handling of Zabbix installer files permits unauthenticated users to access and reconfigure servers.
References
  1. https://www.sonarsource.com/blog/zabbix-case-study-of-unsafe-session-storage/
  2. https://therecord.media/cisa-zabbix-servers-under-attack-with-recently-disclosed-vulnerability
  3. https://www.bleepingcomputer.com/news/security/cisa-warns-of-actively-exploited-vulnerabilities-in-zabbix-servers/
CVE-2022-23131 Zabbix Frontend Authentication Bypass Vulnerability exploitation_technique T1190 Exploit Public-Facing Application
Comments
This vulnerability is exploited by a malicious actor via improper validation via SAML to modify session data and escalate privileges to gain admin access to the Zabbix Frontend. This allows attackers to control the saml_data[username_attribute] value. This flaw enables unauthenticated users to bypass authentication and access the Zabbix dashboard as a highly-privileged user, such as the default "Admin" user. Additionally, incorrect handling of Zabbix installer files permits unauthenticated users to access and reconfigure servers.
References
  1. https://www.sonarsource.com/blog/zabbix-case-study-of-unsafe-session-storage/
  2. https://therecord.media/cisa-zabbix-servers-under-attack-with-recently-disclosed-vulnerability
  3. https://www.bleepingcomputer.com/news/security/cisa-warns-of-actively-exploited-vulnerabilities-in-zabbix-servers/