Updated libcroco packages fix security vulnerabilities:
Heap overflow (input: check end of input before reading a byte) (CVE-2017-7960).
Undefined behavior (tknzr: support only max long rgb values) (CVE-2017-7961).
Denial of service (memory allocation error) via a crafted CSS file (CVE-2017-8834).
Denial of service (infinite loop and CPU consumption) via a crafted CSS file (CVE-2017-8871).