NUUO NVRmini2 through 3.11 allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused to add arbitrary users because of the lack of handle_import_user.php authentication. When combined with another flaw (CVE-2011-5325), it is possible to overwrite arbitrary files under the web root and achieve code execution as root.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-23227
• rapid7/metasploit-framework#16044
• https://github.com/pedrib/PoC/blob/master/advisories/NUUO/nuuo_nvrmini_round2.mkd
• https://news.ycombinator.com/item?id=29936569
• https://portswigger.net/daily-swig/researcher-discloses-alleged-zero-day-vulnerabilities-in-nuuo-nvrmini2-recording-device