CVE-2020-14355

Multiple buffer overflow vulnerabilities were found in the QUIC image decoding process of the SPICE remote display system, before spice-0.14.2-1. Both the SPICE client (spice-gtk) and server are affected by these flaws. These flaws allow a malicious client or server to send specially crafted messages that, when processed by the QUIC image compression algorithm, result in a process crash or potential code execution.

Published: 2020-10-07 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-14355 is rated Moderate Risk (55.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.63%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-14355

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-31 1.11% 1.63% +0.52%
2 2025-12-28 1.44% 1.11% -0.33%
3 2025-12-27 — 1.44% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-14355

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.6 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.3 3.7 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2020-14355

OS Trackers for CVE-2020-14355

vendor priority summary link
alpine medium CVE-2020-14355: 1 source package rows (spice); 27 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 20. https://security.alpinelinux.org/vuln/CVE-2020-14355
debian not yet assigned CVE-2020-14355 not yet assigned priority: Debian including 2 source packages (spice, spice-gtk), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. https://security-tracker.debian.org/tracker/CVE-2020-14355
redhat high — https://access.redhat.com/security/cve/CVE-2020-14355
suse medium CVE-2020-14355 severity moderate: SUSE including 113 source package names (0.38.1.5.8.40:libspice-server1-0.14.2-3.3.1, libspice-client-glib-2_0-8-0.31-9.13.1, …), 354 product×package rows across 62 product lines (Container suse/sles/15.2/virt-launcher, HPE Helion OpenStack 8, … (62 product lines)): Fixed 347, Known Not Affected 7. https://www.suse.com/security/cve/CVE-2020-14355/
ubuntu medium CVE-2020-14355 medium priority: Ubuntu including 2 source packages (spice, spice-gtk), 32 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 15, ignored 8, needed 6, needs-triage 2, DNE 1. https://ubuntu.com/security/CVE-2020-14355

Affected software / configurations for CVE-2020-14355

Vendor Product Version Raw CPE
spice_project spice < 0.14.2 cpe:2.3:a:spice_project:spice:*:*:*:*:*:*:*:*
redhat openstack 16.1 cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 20.04 cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
opensuse leap 15.2 cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
redhat enterprise_linux_aus 8.2 cpe:2.3:o:redhat:enterprise_linux_aus:8.2:*:*:*:*:*:*:*
redhat enterprise_linux_eus 8.1 cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*
redhat enterprise_linux_tus 8.2 cpe:2.3:o:redhat:enterprise_linux_tus:8.2:*:*:*:*:*:*:*
redhat enterprise_linux_update_services_for_sap_solutions 8.0 cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:8.0:*:*:*:*:*:*:*

References for CVE-2020-14355

cvelogic Threat Intelligence