Buffer overflow in Citrix Xenserver
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. 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.044 (91.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Qemu
- Qemu Qemu: — versions 2.9
- Debian Linux — versions 7.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.3, 7.4, 7.5
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
- Red Hat OpenStack — versions 5.0, 6.0, 7.0
Weakness classification (CWE)
References
- www.securityfocus.com/bid/96893 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:0983 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:0982 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/09/msg00007.html (mailing-list)
- security.gentoo.org/glsa/201706-03 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:1206 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1038023 (VDB Entry, Third Party Advisory, vdb-entry)
- support.citrix.com/article/CTX221578 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:0985 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:0987 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-9603?
- CVE-2016-9603 is a medium-severity vulnerability in Citrix Xenserver, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2018-07-27.
- How severe is CVE-2016-9603?
- Medium severity. CVSS v3 base score is 5.5 out of 10.