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

EPSS: 0.036 (88.1th 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

Weakness classification (CWE)

References

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.