Buffer overflow in Citrix Xenserver
CVE-2017-2620
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.
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: 0.036 (88.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Qemu
- Qemu Qemu: — versions 2.8
- Xen — versions 4.7.1
- 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
Weakness classification (CWE)
References
- rhn.redhat.com/errata/RHSA-2017-0329.html (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0334.html (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1037870 (VDB Entry, Third Party Advisory, vdb-entry)
- rhn.redhat.com/errata/RHSA-2017-0328.html (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/09/msg00007.html (mailing-list)
- rhn.redhat.com/errata/RHSA-2017-0333.html (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0351.html (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0454.html (vendor-advisory, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-209.html (Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0331.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-2620?
- CVE-2017-2620 is a medium-severity vulnerability in Citrix Xenserver, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2018-07-27.
- How severe is CVE-2017-2620?
- Medium severity. CVSS v3 base score is 5.5 out of 10.