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CVE-2018-12617

Status Candidate

Overview

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

Related Files

Debian Security Advisory 4454-1
Posted May 31, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4454-1 - Multiple security issues were discovered in QEMU, a fast processor emulator, which could result in denial of service, the execution of arbitrary code or information disclosure.

tags | advisory, denial of service, arbitrary, info disclosure
systems | linux, debian
advisories | CVE-2018-11806, CVE-2018-12617, CVE-2018-16872, CVE-2018-17958, CVE-2018-18849, CVE-2018-18954, CVE-2018-19364, CVE-2018-19489, CVE-2019-12155, CVE-2019-3812, CVE-2019-6778, CVE-2019-9824
MD5 | 1915d439857f56d36281d791ff0376c7
Ubuntu Security Notice USN-3826-1
Posted Nov 26, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3826-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-10839, CVE-2018-11806, CVE-2018-12617, CVE-2018-16847, CVE-2018-17958, CVE-2018-17962, CVE-2018-17963, CVE-2018-18849, CVE-2018-18954, CVE-2018-19364
MD5 | 8120b466efeaad94515a93eb4970a034
QEMU Guest Agent 2.12.50 Denial Of Service
Posted Jun 22, 2018
Authored by Fakhri Zulkifli

QEMU Guest Agent version 2.12.50 suffers from a denial of service vulnerability.

tags | exploit, denial of service
advisories | CVE-2018-12617
MD5 | b12854edacb2fa3c3802ea55c15c6616
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