Vulnerability in transmission

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/transmission/transmission
• github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc
• github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e
• github.com/transmission/transmission/pull/8938
• github.com/transmission/transmission/releases/tag/4.1.3
• joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit
• www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-…