ber-decoder.c in Libksba before 1.3.3 does not properly handle decoder stack overflows, which allows remote attackers to cause a denial of service (abort) via crafted BER data.
https://security.gentoo.org/glsa/201604-04
http://www.ubuntu.com/usn/USN-2982-1
http://www.openwall.com/lists/oss-security/2016/04/29/8