CVE-2017-13673

The vga display update in mis-calculated the region for the dirty bitmap snapshot in case split screen mode is used causing a denial of service (assertion failure) in the cpu_physical_memory_snapshot_get_dirty function.

These are all security issues fixed in the qemu-6.1.0-32.1 package on the GA media of openSUSE Tumbleweed.

This update for qemu fixes the following issues:

Security issues fixed:

• CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).
• CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493).
• CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).
• CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).
• CVE-2018-7858: Fixed a denial of service which could occur while updating the VGA display, after guest has adjusted the display dimensions (bsc#1084604).
• CVE-2017-13673: Fixed a denial of service in the cpu_physical_memory_snapshot_get_dirty function.
• CVE-2017-13672: Fixed a denial of service via vectors involving display update.

Non-security issues fixed:

• Fixed bad guest time after migration (bsc#1113231).

This update for qemu fixes the following issues:

Security vulnerabilities addressed:

• CVE-2019-6778: Fixed an out-of-bounds access in slirp (bsc#1123156)
• CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493)
• CVE-2018-19489: Fixed a Denial-of-Service in virtfs (bsc#1117275)
• CVE-2018-19364: Fixed an use-after-free vulnerability if virtfs interface is deliberately abused (bsc#1116717)
• CVE-2018-18954: Fixed an out-of-bounds access performing PowerNV memory operations (bsc#1114957)
• CVE-2017-13673: Fixed a reachable assert failure during during display update (bsc#1056386)
• CVE-2017-13672: Fixed an out-of-bounds read access during display update (bsc#1056334)
• CVE-2018-7858: Fixed an out-of-bounds access in cirrus when updating vga display allowing for Denial-of-Service (bsc#1084604)

Other bug fixes and changes:

• Fix pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600)
• Fix bad guest time after migration (bsc#1113231)