CVE-2016-1922 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5