CVE-2016-9603
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 9.9 CRITICALCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 4.45% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-119
- Affected
- qemu/qemu · citrix/xenserver · redhat/openstack · debian/debian linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation
- Source
- secalert@redhat.com
References
- http://www.securityfocus.com/bid/96893Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038023Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:0980Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0981Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0982Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0983Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0984Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0985Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0987Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0988Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1205Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1206Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1441Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9603Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00005.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- https://security.gentoo.org/glsa/201706-03Third Party Advisory
- https://support.citrix.com/article/CTX221578Third Party Advisory
- http://www.securityfocus.com/bid/96893Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038023Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:0980Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0981Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0982Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0983Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0984Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0985Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0987Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0988Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1205Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1206Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.