CVE-2016-7421

MEDIUM
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

The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.

References

http://git.qemu.org/?p=qemu.git;a=commit;h=d251157ac1928191af851d199a9ff255d330bec9

http://www.openwall.com/lists/oss-security/2016/09/16/3

http://www.openwall.com/lists/oss-security/2016/09/16/9

http://www.securityfocus.com/bid/92998

https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html

https://security.gentoo.org/glsa/201609-01

Details

Source: MITRE

Published: 2016-12-10

Updated: 2020-10-15

Type: CWE-834

Risk Information

CVSS v2

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

Base Score: 4.4

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

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to 2.7.1 (inclusive)

Configuration 2

OR

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

Tenable Plugins

View all (8 total)

IDNameProductFamilySeverity
135559EulerOS 2.0 SP3 : qemu-kvm (EulerOS-SA-2020-1430)NessusHuawei Local Security Checks
critical
131585EulerOS 2.0 SP2 : qemu-kvm (EulerOS-SA-2019-2431)NessusHuawei Local Security Checks
critical
119310Debian DLA-1599-1 : qemu security updateNessusDebian Local Security Checks
critical
95757openSUSE Security Update : qemu (openSUSE-2016-1451)NessusSuSE Local Security Checks
critical
95537SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:2988-1)NessusSuSE Local Security Checks
critical
95396SUSE SLES12 Security Update : qemu (SUSE-SU-2016:2936-1)NessusSuSE Local Security Checks
critical
94669Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : qemu, qemu-kvm vulnerabilities (USN-3125-1)NessusUbuntu Local Security Checks
critical
93697GLSA-201609-01 : QEMU: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical