Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response and replay it to issue RPC calls, enabling script-torrent-done execution, download-dir changes, or torrent and data deletion.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Transmissionbt Transmission
cpe:2.3:a:transmissionbt:transmission:*:*:*:*:*:*:*:*
|
4.0.0
|
4.1.3
|
References 7
https://github.com/transmission/transmission/pull/8938
Pull Request #8938
https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213…
Patch Commit
https://github.com/transmission/transmission
NVD
https://github.com/transmission/transmission/releases/tag/4.1.3
transmission 4.1.3 Release Notes
https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-ser…
NVD
https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit
NVD
https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive…
VulnCheck Advisory: Transmission 4.0.0 before 4.1.3 Permissive CORS Leaks RPC Anti-CSRF Token