PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.

PuTTY 0.72 before 0.84 has a double free in RSA KEX.

PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.

A vulnerability was detected in PuTTY 0.83. Affected is the function eddsa_verify of the file crypto/ecc-ssh.c of the component Ed25519 Signature Handler. The manipulation results