CVE-2020-4031: canonical ubuntu_linux Use After Free
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2020-4031DEBIAN-CVE-2020-4031
Published 22-06-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-4031 is a high (CVSS 7.5) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.61%
0%100%
Low · -0.20 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 22-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSources4 sources · 3.5–7.5
- CVE.orgCNA3.5LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated3.5LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:NDiffers
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.61%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
-0.20 pp
From 1.81% on 18-09-2026
18-09-202618-10-2026
EPSS score1.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- freerdp2< 2.1.2+dfsg1-1
- debian_linuxEOL10.0
Canonical1 product
- ubuntu_linuxEOL18.04 | 20.04
Fedoraproject1 product
- fedoraEOL31 | 32
Freerdp1 product
- freerdp< 2.1.2
Opensuse1 product
- leapEOL15.1
Ubuntu1 product
- freerdp2< 2.2.0+dfsg1-0ubuntu0.18.04.1 | < 2.2.0+dfsg1-0ubuntu0.20.04.1
6 vendors · 7 products
References
12 links- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74gREPORTMitigationThird Party Advisory
- github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52REPORTPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.htmlVendor AdvisoryMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
