This update for LibVNCServer fixes the following issues:

- CVE-2019-15690: Fixed a heap buffer overflow (bsc#1160471).
- CVE-2019-15681: Fixed a memory leak which could have allowed to a remote attacker to read stack memory (bsc#1155419).
- CVE-2019-20788: Fixed a integer overflow and heap-based buffer overflow via a large height or width value (bsc#1170441).