CVE-2017-7493 Information

Description

Quick Emulator (Qemu) built with the VirtFS host directory sharing via Plan 9 File System(9pfs) support is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.

CVSS Vector

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

Reference

http://seclists.org/oss-sec/2017/q2/278 http://www.securityfocus.com/bid/98574 https://bugzilla.redhat.com/show_bug.cgi?id=1451709 https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html https://security.gentoo.org/glsa/201706-03

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8