CVE-2016-1922

LOW

Description

QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.

References

http://www.debian.org/security/2016/dsa-3469

http://www.debian.org/security/2016/dsa-3470

http://www.debian.org/security/2016/dsa-3471

http://www.openwall.com/lists/oss-security/2016/01/16/1

http://www.openwall.com/lists/oss-security/2016/01/16/6

http://www.securityfocus.com/bid/81058

https://bugzilla.redhat.com/show_bug.cgi?id=1283934

https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html

https://security.gentoo.org/glsa/201604-01

Details

Source: MITRE

Published: 2016-12-29

Updated: 2017-11-04

Type: CWE-476

Risk Information

CVSS v2.0

Base Score: 2.1

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

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3.0

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM