openSUSE Leap 42.2 Important: 2017:0665-1 Xen Privilege Escalation

This update for xen fixes several issues.

These security issues were fixed:

- CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine

cirrus_bitblt_cputovideo failed to check the memory region, allowing for

an out-of-bounds write that allows for privilege escalation

(bsc#1024834).

- CVE-2017-2615: An error in the bitblt copy operation could have allowed

a malicious guest administrator to cause an out of bounds memory access,

possibly leading to information disclosure or privilege escalation

(bsc#1023004).

- A malicious guest could have, by frequently rebooting over extended

periods of time, run the host system out of memory, resulting in a

Denial of Service (DoS) (bsc#1022871)

- CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support was vulnerable

to a divide by zero issue while copying VGA data. A privileged user

inside guest could have used this flaw to crash the process instance on

the...