CVE-2016-9603

moderate-risk
Published 2018-07-27

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Do I need to act?

~
1.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
ADJACENT_NETWORK / HIGH complexity

Affected Products (20)

Affected Vendors

Debian Redhat Citrix Qemu

References (36)

Third Party Advisory http://www.securityfocus.com/bid/96893
Third Party Advisory http://www.securitytracker.com/id/1038023
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0980
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0981
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0982
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0983
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0984
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0985
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0987
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:0988
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1205
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1206
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1441
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9603
Third Party Advisory https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
Third Party Advisory https://security.gentoo.org/glsa/201706-03
Third Party Advisory https://support.citrix.com/article/CTX221578
Third Party Advisory http://www.securityfocus.com/bid/96893
Third Party Advisory http://www.securitytracker.com/id/1038023
and 16 more references
39
/ 100
moderate-risk
Severity 14/34 · Moderate
Exploitability 4/34 · Minimal
Exposure 21/34 · High