CVE-2018-7550

MEDIUM

Description

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.

References

http://www.securityfocus.com/bid/103181

https://access.redhat.com/errata/RHSA-2018:1369

https://access.redhat.com/errata/RHSA-2018:2462

https://bugzilla.redhat.com/show_bug.cgi?id=1549798

https://lists.debian.org/debian-lts-announce/2018/04/msg00015.html

https://lists.debian.org/debian-lts-announce/2018/04/msg00016.html

https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06890.html

https://usn.ubuntu.com/3649-1/

https://www.debian.org/security/2018/dsa-4213

Details

Source: MITRE

Published: 2018-03-01

Modified: 2018-09-07

Type: CWE-125

Risk Information

CVSS v2.0

Base Score: 4.6

Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P)

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 8.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 2

Severity: HIGH