NULL Pointer Dereference Vulnerability in OpenSSL 1.1.0

CVE-2016-7053 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

In OpenSSL 1.1.0 before 1.1.0c, 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.

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