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
EPSS: 0.044 (90.4th percentile) — read the EPSS interpretation.
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.
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Qemu
- Qemu Qemu: — versions 2.9
- Debian Debian_linux — versions 7.0
- Redhat Enterprise_linux_desktop — versions 6.0, 7.0
- Redhat Enterprise_linux_server — versions 6.0, 7.0
- Redhat Enterprise_linux_server_aus — versions 7.3, 7.4
- Redhat Enterprise_linux_server_eus — versions 7.3, 7.4, 7.5
- Redhat Enterprise_linux_workstation — versions 6.0, 7.0
- Redhat Openstack — versions 5.0, 6.0, 7.0
Weakness classification (CWE)
References
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, 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.