Zabbix through 4.4.0alpha1 allows User Enumeration. With login requests, it is possible to enumerate application usernames based on the variability of server responses (e.g., the "Login name or password is incorrect" and "No permissions for system access" messages, or just blocking for a number of seconds). This affects both api_jsonrpc.php and index.php.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-agent" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-agent-dbgsym" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-frontend-php" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-java-gateway" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-mysql" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-mysql-dbgsym" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-pgsql" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-pgsql-dbgsym" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-sqlite3" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-proxy-sqlite3-dbgsym" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-server-mysql" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-server-mysql-dbgsym" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-server-pgsql" }, { "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm4", "binary_name": "zabbix-server-pgsql-dbgsym" } ] }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-agent" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-agent-dbgsym" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-frontend-php" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-java-gateway" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-mysql" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-mysql-dbgsym" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-pgsql" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-pgsql-dbgsym" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-sqlite3" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-proxy-sqlite3-dbgsym" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-server-mysql" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-server-mysql-dbgsym" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-server-pgsql" }, { "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm3", "binary_name": "zabbix-server-pgsql-dbgsym" } ] }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-agent" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-agent-dbgsym" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-frontend-php" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-java-gateway" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-mysql" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-mysql-dbgsym" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-pgsql" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-pgsql-dbgsym" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-sqlite3" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-proxy-sqlite3-dbgsym" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-server-mysql" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-server-mysql-dbgsym" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-server-pgsql" }, { "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm3", "binary_name": "zabbix-server-pgsql-dbgsym" } ] }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-agent" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-agent-dbgsym" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-frontend-php" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-java-gateway" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-mysql" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-mysql-dbgsym" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-pgsql" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-pgsql-dbgsym" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-sqlite3" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-proxy-sqlite3-dbgsym" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-server-mysql" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-server-mysql-dbgsym" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-server-pgsql" }, { "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm1", "binary_name": "zabbix-server-pgsql-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-agent" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-agent-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-agent2" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-agent2-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-frontend-php" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-java-gateway" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-mysql" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-mysql-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-pgsql" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-pgsql-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-sqlite3" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-proxy-sqlite3-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-server-mysql" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-server-mysql-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-server-pgsql" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-server-pgsql-dbgsym" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-web-service" }, { "binary_version": "1:6.0.29+dfsg-1", "binary_name": "zabbix-web-service-dbgsym" } ] }