Net::BitTorrent vulnerabilities

The vulnerability in Net::BitTorrent for Perl before version 2.1.0 generates the MSE Diffie-Hellman private key using a non-cryptographic PRNG based on rand(). This allows a passive observer to recover the PRNG state from cleartext padding, then compute the private key and decrypt the connection.

A vulnerability in the Net::BitTorrent library for Perl (up to version 2.1.0) allows remote memory exhaustion via deeply nested bencoded input. The decoder has no recursion depth limit, and each recursion level keeps a copy of the buffer, causing quadratic memory consumption.

In the Net::BitTorrent library for Perl versions up to and including 2.1.0, there is a remote memory exhaustion vulnerability. The issue is the lack of an upper bound on the message-length prefix in the peer-wire framing, allowing a malicious peer to send a huge prefix and stream data, causing unbounded growth of the input buffer.

A vulnerability in Net::BitTorrent for Perl before version 2.1.0 allows writing files outside the download directory via path traversal in peer-supplied metadata. An attacker can exploit the ut_metadata extension (BEP09) to supply file names containing ".." sequences, bypassing path validation.