high
7.5
CWE
416
Advisory Published
Updated

CVE-2020-4031: Use After Free

First published: Mon Jun 22 2020(Updated: )

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.

Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
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
ubuntu/freerdp2<2.2.0+dfsg1-0ubuntu0.18.04.1
2.2.0+dfsg1-0ubuntu0.18.04.1
ubuntu/freerdp2<2.2.0+dfsg1-0ubuntu0.20.04.1
2.2.0+dfsg1-0ubuntu0.20.04.1
debian/freerdp2<=2.0.0~git20190204.1.2693389a+dfsg1-1+deb10u2
2.3.0+dfsg1-2+deb10u4
2.3.0+dfsg1-2+deb11u1
2.10.0+dfsg1-1
2.11.2+dfsg1-1
2.11.5+dfsg1-1

Remedy

https://github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2020-4031.

  • What is the severity of CVE-2020-4031?

    The severity of CVE-2020-4031 is high with a CVSS score of 7.5.

  • Which software versions are affected by CVE-2020-4031?

    All FreeRDP clients using compatibility mode with /relax-order-checks prior to version 2.1.2 are affected by CVE-2020-4031.

  • How can I fix CVE-2020-4031?

    To fix CVE-2020-4031, update your FreeRDP client to version 2.1.2 or higher.

  • Where can I find more information about CVE-2020-4031?

    You can find more information about CVE-2020-4031 at the following references: [MITRE CVE-2020-4031](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4031), [GitHub Security Advisory](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74g), [FreeRDP Release Announcement](http://www.freerdp.com/2020/06/22/2_1_2-released).

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