CVE-2020-4031

Name: CVE-2020-4031
Creator: NVD / NIST
Published: 2020-06-22T22:15:13.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.81%

Last modified Jun 17, 2026

CVE-2020-4031 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. EPSS estimates a 1.81% chance of exploitation in the next 30 days.

Description

In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. This is fixed in version 2.1.2.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.81%

75.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Freerdp	Freerdp	< 2.1.2
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32
Opensuse	Leap	15.1
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Debian	Debian Linux	10.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.htmlMailing List, Third Party Advisory
http://www.freerdp.com/2020/06/22/2_1_2-releasedRelease Notes, Vendor Advisory
https://github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52Patch, Third Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74gMitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V/
https://usn.ubuntu.com/4481-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.htmlMailing List, Third Party Advisory
http://www.freerdp.com/2020/06/22/2_1_2-releasedRelease Notes, Vendor Advisory
https://github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52Patch, Third Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74gMitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V/
https://usn.ubuntu.com/4481-1/Third Party Advisory

Timeline

Published: Jun 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4031?

In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. This is fixed in version 2.1.2.

How severe is CVE-2020-4031?

CVE-2020-4031 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.81% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4031?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4031?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST