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graph_realtime.php in Cacti 1.2.8 allows remote attackers to execute arbitrary OS commands via shell metacharacters in a cookie, if a guest user has the graph real-time privilege.
$ ./CVE-2020-8813.py -h
PoC of CVE-2020-8813 - RCE through graph_realtime.php in Cacti 1.2.8 - by @podalirius_
usage: CVE-2020-8813.py [-h] -t TARGET [-v] [-u USERNAME] [-p PASSWORD] (-L | -c COMMAND) [-k]
options:
-h, --help show this help message and exit
-t TARGET, --target TARGET
Target URL of the cacti
-v, --verbose Verbose mode. (default: False)
-u USERNAME, --username USERNAME
Username to connect to Cacti
-p PASSWORD, --password PASSWORD
Password to connect to Cacti
-L, --live Live mode. (default: False)
-c COMMAND, --command COMMAND
Execute a single command
-k, --insecure Allow insecure server connections when using SSL (default: False)