Input Leap (aka input-leap) through 3.0.3, when the non-default –enable-drag-drop option is used on Windows or macOS, mishandles the / versus distinction and allows directory traversal, with resultant code execution if a file is written to a startup directory. This occurs via a DDRG message.
Weakness
The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/267.html
- https://cwe.mitre.org/data/definitions/3.html
- https://cwe.mitre.org/data/definitions/71.html
- https://cwe.mitre.org/data/definitions/78.html
- https://cwe.mitre.org/data/definitions/79.html
- https://cwe.mitre.org/data/definitions/80.html
References
- https://github.com/deskflow/deskflow/security/advisories
- https://github.com/input-leap/input-leap/blob/master/src/lib/inputleap/DropHelper.cpp
- https://github.com/input-leap/input-leap/blob/v3.0.3/src/lib/inputleap/DragInformation.cpp
- https://github.com/input-leap/input-leap/releases
- https://nvd.nist.gov/vuln/detail/CVE-2021-42072
- https://raw.githubusercontent.com/debauchee/barrier/master/src/lib/barrier/DragInformation.cpp
- https://raw.githubusercontent.com/input-leap/input-leap/master/src/lib/inputleap/ArgParser.cpp
- https://raw.githubusercontent.com/input-leap/input-leap/master/src/lib/net/SecureSocket.cpp
- https://raw.githubusercontent.com/input-leap/input-leap/v3.0.3/src/lib/server/Server.cpp
- https://www.openwall.com/lists/oss-security/2026/09/25/4