CVE-2018-19364

hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.

hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.

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)

Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled NE2000 device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-10839)

It was discovered that QEMU incorrectly handled the Slirp networking back-end. A privileged 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. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-11806)

Fakhri Zulkifli discovered that the QEMU guest agent incorrectly handled certain QMP commands. An attacker could possibly use this issue to crash the QEMU guest agent, resulting in a denial of service. (CVE-2018-12617)

Li Qiang discovered that QEMU incorrectly handled NVM Express Controller emulation. 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. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16847)

Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled RTL8139 device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17958)

Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled PCNET device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17962)

Daniel Shapira discovered that QEMU incorrectly handled large packet sizes. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17963)

It was discovered that QEMU incorrectly handled LSI53C895A device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-18849)

Moguofang discovered that QEMU incorrectly handled the IPowerNV LPC controller. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-18954)

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-2018-19364)