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Fencer Intel
medium 6.6

CVE-2020-14355 json

Multiple buffer overflow vulnerabilities were found in the QUIC image decoding process of the SPICE remote display system, before spice-0.1…

published 6y ago modified 4mo ago also EUVD-2020-6499

cvss
6.6
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • spice_project spice 0.14.2
  • spice Debian 14, Debian 13, Debian 12 0.14.3-2
  • spice-gtk Debian 14, Debian 13, Debian 12 0.39-1

debian advisories DEBIAN-CVE-2020-14355

  • spice Ubuntu 16.04 LTS 0.12.6-4ubuntu0.5
  • spice Ubuntu 18.04 LTS 0.14.0-1ubuntu2.5
  • spice Ubuntu 20.04 LTS 0.14.2-4ubuntu3.1
  • spice Ubuntu Pro 14.04 LTS 0.12.4-0nocelt2ubuntu1.8+esm1

ubuntu advisories UBUNTU-CVE-2020-14355

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • spice RHEL 7 0.14.0-9.el7_9.1
  • spice-gtk RHEL 7 0.35-5.el7_9.1
  • spice-glib RHEL 7 0.35-5.el7_9.1
  • spice-gtk3 RHEL 7 0.35-5.el7_9.1
  • spice-server RHEL 7 0.14.0-9.el7_9.1
  • spice-gtk-tools RHEL 7 0.35-5.el7_9.1
  • spice-gtk3-vala RHEL 7 0.35-5.el7_9.1
  • spice RHEL 8 0.14.2-1.el8_2.1

red hat advisories RHSA-2020:4187RHSA-2020:4186RHSA-2020:4185RHSA-2020:4184

  • spice SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 0.14.1-4.3.1
  • spice-gtk SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 0.35-3.3.1
  • spice-gtk SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 0.34-3.6.1
  • spice-gtk SLES 12 SP2-BCL 0.31-9.13.1
  • spice SLES 12 SP2-BCL 0.12.7-10.12.1
  • spice SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 0.14.0-4.9.1
  • spice-gtk SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 0.33-3.9.1
  • spice SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 0.12.8-15.1

suse advisories SUSE-SU-2021:1956-1SUSE-SU-2021:1928-1SUSE-SU-2021:1911-1SUSE-SU-2021:1905-1SUSE-SU-2021:14744-1SUSE-SU-2021:1902-1

  • spice openSUSE Tumbleweed 0.15.0-1.3
  • spice-gtk openSUSE Tumbleweed 0.39-1.8
  • spice-gtk openSUSE Leap 15.2 0.37-lp152.2.3.1
  • spice openSUSE Leap 15.2 0.14.2-lp152.2.3.1

opensuse advisories openSUSE-SU-2024:11397-1openSUSE-SU-2024:11398-1openSUSE-SU-2020:1803-1openSUSE-SU-2020:1802-1

  • spice Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 0.15.0-r0

alpine advisories ALPINE-CVE-2020-14355

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • spice Arch Linux 0.15.0-1
  • spice-gtk Arch Linux 0.39-1

arch linux advisories AVG-1239AVG-2134

Is CVE-2020-14355 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-14355 updated cvss 6.6

spice: multiple buffer overflow vulnerabilities in QUIC decoding code

  • Red Hat Enterprise Linux 6 spice-gtk, spice-glib, spice-client, spice-server, spice-gtk-tools, spice-gtk-python
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) spice-debugsource 0.14.2-1.el8_2.1, spice-server-devel 0.14.2-1.el8_2.1, spice-server-debuginfo 0.14.2-1.el8_2.1
    fixed: vendor fix RHSA-2020:4186
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) spice-debugsource 0.14.2-1.el8_1.1, spice-server-devel 0.14.2-1.el8_1.1, spice-server-debuginfo 0.14.2-1.el8_1.1
    fixed: vendor fix RHSA-2020:4185
  • Red Hat Enterprise Linux AppStream (v. 8) spice 0.14.2-1.el8_2.1, spice-gtk 0.37-1.el8_2.2, spice-glib 0.37-1.el8_2.2, spice-gtk3 0.37-1.el8_2.2, spice-server 0.14.2-1.el8_2.1, spice-gtk-tools 0.37-1.el8_2.2, +1 more
    fixed: vendor fix RHSA-2020:4186
  • Red Hat Enterprise Linux AppStream E4S (v. 8.0) spice 0.14.0-7.el8_0.1, spice-gtk 0.35-7.el8_0.1, spice-glib 0.35-7.el8_0.1, spice-gtk3 0.35-7.el8_0.1, spice-server 0.14.0-7.el8_0.1, spice-gtk-tools 0.35-7.el8_0.1, +1 more
    fixed: vendor fix RHSA-2020:4184
  • Red Hat Enterprise Linux AppStream EUS (v. 8.1) spice 0.14.2-1.el8_1.1, spice-gtk 0.37-1.el8_1.2, spice-glib 0.37-1.el8_1.2, spice-gtk3 0.37-1.el8_1.2, spice-server 0.14.2-1.el8_1.1, spice-gtk-tools 0.37-1.el8_1.2, +1 more
    fixed: vendor fix RHSA-2020:4185
  • Red Hat Enterprise Linux Client (v. 7) spice 0.14.0-9.el7_9.1, spice-gtk 0.35-5.el7_9.1, spice-glib 0.35-5.el7_9.1, spice-gtk3 0.35-5.el7_9.1, spice-server 0.14.0-9.el7_9.1 Red Hat Enterprise Linux Client Optional (v. 7) spice-gtk-tools 0.35-5.el7_9.1, spice-gtk3-vala 0.35-5.el7_9.1 Red Hat Enterprise Linux ComputeNode Optional (v. 7) spice 0.14.0-9.el7_9.1, spice-server 0.14.0-9.el7_9.1 Red Hat Enterprise Linux Server (v. 7) spice 0.14.0-9.el7_9.1, spice-gtk 0.35-5.el7_9.1, spice-glib 0.35-5.el7_9.1, spice-gtk3 0.35-5.el7_9.1, spice-server 0.14.0-9.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7) spice-gtk 0.35-5.el7_9.1, spice-glib 0.35-5.el7_9.1, spice-gtk3 0.35-5.el7_9.1, spice-gtk-tools 0.35-5.el7_9.1, spice-gtk3-vala 0.35-5.el7_9.1 Red Hat Enterprise Linux Workstation (v. 7) spice 0.14.0-9.el7_9.1, spice-gtk 0.35-5.el7_9.1, spice-glib 0.35-5.el7_9.1, spice-gtk3 0.35-5.el7_9.1, spice-server 0.14.0-9.el7_9.1
    +1 more products
    Red Hat Enterprise Linux Workstation Optional (v. 7) spice-gtk-tools 0.35-5.el7_9.1, spice-gtk3-vala 0.35-5.el7_9.1
    fixed: vendor fix RHSA-2020:4187
  • Red Hat Enterprise Linux 9 spice
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.69% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.6 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • n/a spice

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.