Security update for LibVNCServer (important)

LibVNCServer was updated to fix two security issues.

These security issues were fixed:

• CVE-2018-7225: Missing input sanitization inside rfbserver.c
  rfbProcessClientNormalMessage() (bsc#1081493).
• CVE-2016-9942: Heap-based buffer overflow in ultra.c allowed remote
  servers to cause a denial of service (application crash) or possibly
  execute arbitrary code via a crafted FramebufferUpdate message with the
  Ultra type tile, such that the LZO payload decompressed length exceeds
  what is specified by the tile dimensions (bsc#1017712).
• CVE-2016-9941: Heap-based buffer overflow in rfbproto.c allowed remote
  servers to cause a denial of service (application crash) or possibly
  execute arbitrary code via a crafted FramebufferUpdate message
  containing a subrectangle outside of the client drawing area
  (bsc#1017711).