CVE-2016-2195

Integer overflow in the PointGFp constructor in Botan before 1.10.11 and
1.11.x before 1.11.27 allows remote attackers to overwrite memory and
possibly execute arbitrary code via a crafted ECC point, which triggers a
heap-based buffer overflow.
The bigint_mul and bigint_sqr functions received the size of the
output buffer, but only used it to dispatch to a faster algorithm
in cases where there was sufficient output space to call an unrolled
multiplication function.
The result is a heap overflow accessible via ECC point decoding, which
accepted untrusted inputs. This is likely exploitable for remote code
execution.

Notes