CVE-2020-4031: Use-After-Free in gdi_SelectObject in FreeRDP
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 Software | Affected Version | How 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 | |
| debian/freerdp2 | 2.3.0+dfsg1-2+deb11u1 2.10.0+dfsg1-1 2.11.7+dfsg1-4 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html
- http://www.freerdp.com/2020/06/22/2_1_2-released
- https://github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74g
- https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V/
- https://usn.ubuntu.com/4481-1/
- https://launchpad.net/bugs/cve/CVE-2020-4031
- 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://security-tracker.debian.org/tracker/CVE-2020-4031
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4031
- https://nvd.nist.gov/vuln/detail/CVE-2020-4031
- https://ubuntu.com/security/CVE-2020-4031
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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