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CVE-2018-7550

Published: 1 March 2018

The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
hirsute
Released (1:2.11+dfsg-1ubuntu9)
artful
Released (1:2.10+dfsg-0ubuntu3.6)
bionic
Released (1:2.11+dfsg-1ubuntu7.1)
cosmic
Released (1:2.11+dfsg-1ubuntu9)
disco
Released (1:2.11+dfsg-1ubuntu9)
eoan
Released (1:2.11+dfsg-1ubuntu9)
focal
Released (1:2.11+dfsg-1ubuntu9)
groovy
Released (1:2.11+dfsg-1ubuntu9)
trusty
Released (2.0.0+dfsg-2ubuntu1.41)
upstream Needs triage

xenial
Released (1:2.5+dfsg-5ubuntu10.28)
Patches:
upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=2a8fcd119eb7c6bb3837fc3669eb1b2dfb31daf8
qemu-kvm
Launchpad, Ubuntu, Debian
hirsute Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H