An issue was discovered in BACKCLICK Professional 5.9.63. Due to improper validation or sanitization of upload filenames, an externally reachable, unauthenticated update function permits writing files outside the intended target location. Achieving remote code execution is possible, e.g., by uploading an executable file.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Link | Tags |
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https://www.syss.de/pentest-blog/vielfaeltige-schwachstellen-in-backclick-professional-syss-2022-026-bis-037 | third party advisory |
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2022-031.txt | third party advisory exploit |