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CVE-2017-12809

Status Candidate

Overview

QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by flushing an empty CDROM device drive.

Related Files

Ubuntu Security Notice USN-3414-2
Posted Sep 20, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3414-2 - USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for CVE-2017-9375 was incomplete and caused a regression in the USB xHCI controller emulation support. This update fixes the problem. Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control. A guest attacker could use this issue to elevate privileges inside the guest. Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources or crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-10664, CVE-2017-10806, CVE-2017-10911, CVE-2017-11434, CVE-2017-12809, CVE-2017-7493, CVE-2017-8112, CVE-2017-8380, CVE-2017-9060, CVE-2017-9310, CVE-2017-9330, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375, CVE-2017-9503, CVE-2017-9524
MD5 | 92172bfdd6366a35c975fa4e430d2218
Ubuntu Security Notice USN-3414-1
Posted Sep 14, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3414-1 - Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control. A guest attacker could use this issue to elevate privileges inside the guest. Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources or crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2017-10664, CVE-2017-10806, CVE-2017-10911, CVE-2017-11434, CVE-2017-12809, CVE-2017-7493, CVE-2017-8112, CVE-2017-8380, CVE-2017-9060, CVE-2017-9310, CVE-2017-9330, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375, CVE-2017-9503, CVE-2017-9524
MD5 | 0392d6964c9f9ee67e40b47efe84d6b0
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