Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.
https://xenbits.xen.org/xsa/advisory-209.html
https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04700.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2620
http://www.openwall.com/lists/oss-security/2017/02/21/1
https://support.citrix.com/article/CTX220771
https://security.gentoo.org/glsa/201704-01
https://security.gentoo.org/glsa/201703-07
https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
http://www.securitytracker.com/id/1037870
http://www.securityfocus.com/bid/96378
http://rhn.redhat.com/errata/RHSA-2017-0454.html
http://rhn.redhat.com/errata/RHSA-2017-0396.html
http://rhn.redhat.com/errata/RHSA-2017-0352.html
http://rhn.redhat.com/errata/RHSA-2017-0351.html
http://rhn.redhat.com/errata/RHSA-2017-0350.html
http://rhn.redhat.com/errata/RHSA-2017-0334.html
http://rhn.redhat.com/errata/RHSA-2017-0333.html
http://rhn.redhat.com/errata/RHSA-2017-0332.html
http://rhn.redhat.com/errata/RHSA-2017-0331.html
http://rhn.redhat.com/errata/RHSA-2017-0330.html
http://rhn.redhat.com/errata/RHSA-2017-0329.html
http://rhn.redhat.com/errata/RHSA-2017-0328.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
Source: MITRE
Published: 2018-07-27
Updated: 2021-08-04
Type: CWE-125
Base Score: 9
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 8
Severity: HIGH
Base Score: 9.9
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 3.1
Severity: CRITICAL