CVE-2018-19489

v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.

v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.

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-2018-18954: Fixed a denial of service vulnerability related to PowerPC PowerNV memory operations (bsc#1114957).

Non-security issues fixed:

• Improved disk performance for qemu on xen (bsc#1100408).
• Fixed xen offline migration (bsc#1079730, bsc#1101982, bsc#1063993).
• Fixed pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600).
• Use /bin/bash to echo value into sys fs for ksm control (bsc#1112646).
• Return specification exception for unimplemented diag 308 subcodes rather than a hardware error (bsc#1123179).

This update was imported from the SUSE:SLE-15:Update update project.

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-2018-18954: Fixed a denial of service vulnerability related to PowerPC PowerNV memory operations (bsc#1114957).

Non-security issues fixed:

• Improved disk performance for qemu on xen (bsc#1100408).
• Fixed xen offline migration (bsc#1079730, bsc#1101982, bsc#1063993).
• Fixed pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600).
• Use /bin/bash to echo value into sys fs for ksm control (bsc#1112646).
• Return specification exception for unimplemented diag 308 subcodes rather than a hardware error (bsc#1123179).

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-2018-18954: Fixed a denial of service vulnerability related to PowerPC PowerNV memory operations (bsc#1114957).

Non-security issues fixed:

• Improved disk performance for qemu on xen (bsc#1100408).
• Fixed xen offline migration (bsc#1079730, bsc#1101982, bsc#1063993).
• Fixed pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600).
• Use /bin/bash to echo value into sys fs for ksm control (bsc#1112646).
• Return specification exception for unimplemented diag 308 subcodes rather than a hardware error (bsc#1123179).

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-2018-19489: 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).

This update for qemu fixes the following issues:

Security issue 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).

This update for qemu fixes the following issues:

Security issue 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).

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)

This update for kvm fixes the following issues:

Security issues fixed:

• CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).
• CVE-2018-19489: 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).

Non-security issue fixed:

• Fixed LAPIC TSC deadline timer save/restore (bsc#1109544)

Michael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker inside the guest could use this issue to read or write arbitrary files and cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10. (CVE-2018-16867)

Michael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker inside the guest could use this issue to read arbitrary files, contrary to expectations. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16872)

Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File System support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-19489)

Li Quang and Saar Amar discovered multiple issues in the QEMU PVRDMA device. An attacker inside the guest could use these issues to cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10. These issues were resolved by disabling PVRDMA support in Ubuntu 18.10. (CVE-2018-20123, CVE-2018-20124, CVE-2018-20125, CVE-2018-20126, CVE-2018-20191, CVE-2018-20216)

Michael Hanselmann discovered that QEMU incorrectly handled certain i2c commands. A local attacker could possibly use this issue to read QEMU process memory. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2019-3812)

It was discovered that QEMU incorrectly handled the Slirp networking back-end. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2019-6778)