A symlink following vulnerability was found in Samba, where a user can create a symbolic link that will make smbd escape the configured share path. This flaw allows a remote user with access to the exported part of the file system under a share via SMB1 unix extensions or NFS to create symlinks to files outside the smbd configured share path and gain access to another restricted servers filesystem.
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Samba | Samba | 4.17.0 (including) | 4.17.2 (excluding) |
Samba | Ubuntu | trusty | * |
Samba | Ubuntu | xenial | * |