CVE-2017-7493

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

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

Details

Source: MITRE

Published: 2017-05-17

Updated: 2020-10-23

Type: CWE-732

Risk Information

CVSS v2

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

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to 2.9.1 (inclusive)

Configuration 2

OR

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Tenable Plugins

View all (14 total)

IDNameProductFamilySeverity
144829EulerOS Virtualization 3.0.2.6 : qemu (EulerOS-SA-2021-1057)NessusHuawei Local Security Checks
critical
138009EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790)NessusHuawei Local Security Checks
critical
117351Debian DLA-1497-1 : qemu security update (Spectre)NessusDebian Local Security Checks
critical
104780SUSE SLES11 Security Update : kvm (SUSE-SU-2017:3084-1)NessusSuSE Local Security Checks
critical
104495SUSE SLES12 Security Update : qemu (SUSE-SU-2017:2969-1)NessusSuSE Local Security Checks
critical
104494SUSE SLES11 Security Update : kvm (SUSE-SU-2017:2963-1)NessusSuSE Local Security Checks
critical
104471SUSE SLES12 Security Update : qemu (SUSE-SU-2017:2946-1)NessusSuSE Local Security Checks
critical
103372Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : qemu regression (USN-3414-2)NessusUbuntu Local Security Checks
critical
103217Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : qemu vulnerabilities (USN-3414-1)NessusUbuntu Local Security Checks
critical
101909Debian DLA-1035-1 : qemu security updateNessusDebian Local Security Checks
critical
101758openSUSE Security Update : qemu (openSUSE-2017-822)NessusSuSE Local Security Checks
critical
101227SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2017:1774-1)NessusSuSE Local Security Checks
critical
100630GLSA-201706-03 : QEMU: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
100514Debian DLA-965-1 : qemu-kvm security updateNessusDebian Local Security Checks
critical