CVE-2019-15034

hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.

This update for qemu fixes the following issues:

• CVE-2020-7039: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1161066).
• CVE-2019-15034: Fixed a buffer overflow in hw/display/bochs-display.c due to improper PCI config space allocation (bsc#1166379).
• CVE-2020-1711: Fixed an out of bounds heap buffer access iscsi_co_block_status() routine which could have allowed a remote denial of service or arbitrary code with privileges of the QEMU process on the host (bsc#1166240).
• CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() routine while emulating the identification protocol and copying message data to a socket buffer (bsc#1123156).
• CVE-2020-8608: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1163018).
• CVE-2019-20382: Fixed a memory leak in the VNC display driver which could have led to exhaustion of the host memory leading to a potential Denial of service (bsc#1165776).
• Fixed a live migration error (bsc#1154790).
• Fixed an issue where migrating VMs on KVM gets missing features:ospke error (bsc#1162729).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

This update for qemu fixes the following issues:

• CVE-2020-7039: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1161066).
• CVE-2019-15034: Fixed a buffer overflow in hw/display/bochs-display.c due to improper PCI config space allocation (bsc#1166379).
• CVE-2020-1711: Fixed an out of bounds heap buffer access iscsi_co_block_status() routine which could have allowed a remote denial of service or arbitrary code with privileges of the QEMU process on the host (bsc#1166240).
• CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() routine while emulating the identification protocol and copying message data to a socket buffer (bsc#1123156).
• CVE-2020-8608: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1163018).
• CVE-2019-20382: Fixed a memory leak in the VNC display driver which could have led to exhaustion of the host memory leading to a potential Denial of service (bsc#1165776).
• Fixed a live migration error (bsc#1154790).
• Fixed an issue where migrating VMs on KVM gets missing features:ospke error (bsc#1162729).

This update for qemu fixes the following issues:

• CVE-2020-7039: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1161066).
• CVE-2019-15034: Fixed a buffer overflow in hw/display/bochs-display.c due to improper PCI config space allocation (bsc#1166379).
• CVE-2020-1711: Fixed an out of bounds heap buffer access iscsi_co_block_status() routine which could have allowed a remote denial of service or arbitrary code with privileges of the QEMU process on the host (bsc#1166240).
• CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() routine while emulating the identification protocol and copying message data to a socket buffer (bsc#1123156).
• CVE-2020-8608: Fixed a heap buffer overflow in tcp_emu() routine while emulating IRC and other protocols (bsc#1163018).
• CVE-2019-20382: Fixed a memory leak in the VNC display driver which could have led to exhaustion of the host memory leading to a potential Denial of service (bsc#1165776).
• Fixed live migration errors (bsc#1154790, bsc#1156794, bsc#1156642).
• Fixed an issue where migrating VMs on KVM gets missing features:ospke error (bsc#1162729).
• Fixed an issue where booting up a guest system with mdev passthrough device as installation device was failing (bsc#1158880).

It was discovered that QEMU incorrectly handled bochs-display devices. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. This issue only affected Ubuntu 19.10. (CVE-2019-15034)

It was discovered that QEMU incorrectly handled memory during certain VNC operations. A remote attacker could possibly use this issue to cause QEMU to consume resources, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2019-20382)

It was discovered that QEMU incorrectly generated QEMU Pointer Authentication signatures on ARM. A local attacker could possibly use this issue to bypass PAuth. This issue only affected Ubuntu 19.10. (CVE-2020-10702)

Ziming Zhang discovered that QEMU incorrectly handled ATI VGA emulation. A local attacker in a guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-11869)

Aviv Sasson discovered that QEMU incorrectly handled Slirp networking. A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2020-1983)