Security update for virtualbox (important)

This update for virtualbox to version 5.1.32 fixes the following issues:

The following vulnerabilities were fixed (boo#1076372):

• CVE-2017-5715: Systems with microprocessors utilizing speculative
  execution and indirect branch prediction may allow unauthorized
  disclosure of information to an attacker with local user access via a
  side-channel analysis, also known as "Spectre", bsc#1068032.
• CVE-2018-2676: Local authenticated attacker may gain elevated privileges
• CVE-2018-2685: Local authenticated attacker may gain elevated privileges
• CVE-2018-2686: Local authenticated attacker may gain elevated privileges
• CVE-2018-2687: Local authenticated attacker may gain elevated privileges
• CVE-2018-2688: Local authenticated attacker may gain elevated privileges
• CVE-2018-2689: Local authenticated attacker may gain elevated privileges
• CVE-2018-2690: Local authenticated attacker may gain elevated privileges
• CVE-2018-2693: Local authenticated attacker may gain elevated privileges
  via guest additions
• CVE-2018-2694: Local authenticated attacker may gain elevated privileges
• CVE-2018-2698: Local authenticated attacker may gain elevated privileges

The following bug fixes are included:

• fix occasional screen corruption when host screen resolution is changed
• increase proposed disk size when creating new VMs for Windows 7 and newer
• fix broken communication with certain devices on Linux hosts
• Fix problems using 256MB VRAM in raw-mode VMs
• add HDA support for more exotic guests (e.g. Haiku)
• fix playback with ALSA backend (5.1.28 regression)
• fix a problem where OHCI emulation might sporadically drop data transfers