2013-08-20 01:55:08 2019-03-21 18:04:58

Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.

Vector

NETWORK

Complexity

MEDIUM

Authentication

NONE

Confidentiality

PARTIAL

Integrity

PARTIAL

Availability

PARTIAL