CVE-2015-2157
The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive information by reading the memory.
Date published : 2015-03-27
http://www.securityfocus.com/bid/72825
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html