| + |
Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. |
| + |
|
| + |
OpenSSL 1.1.0 users should upgrade to 1.1.0c |
| + |
|
| + |
This issue does not affect OpenSSL versions prior to 1.1.0 |
| + |
|
| + |
This issue was reported to OpenSSL on 12th October 2016 by Tyler Nighswander of ForAllSecure. The fix was developed by Stephen Henson of the OpenSSL development team. |