CVE-2021-41159: fedoraproject fedora Out-of-bounds Write
Vulnerability summary
CVE-2021-41159 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 1.49% chance of exploitation in the next 30 days, higher than 73.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 11 · Related 5Timeline
- 21-10-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway.
CVSS metrics
5 scores · 4 sources · 2 versions- CVE.orgCNA5.8MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.49%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
+0.10 pp
From 1.39% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu2 products
- freerdpAll versions (No fix recorded)
- freerdp2< 2.2.0+dfsg1-0ubuntu0.18.04.2 | < 2.2.0+dfsg1-0ubuntu0.20.04.2 | < 2.3.0+dfsg1-2ubuntu2
Debian1 product
- freerdp2< 2.4.1+dfsg1-1
Fedoraproject1 product
- fedoraEOL35
Freerdp1 product
- freerdp< 2.4.1
4 vendors · 5 products
References
7 links- lists.fedoraproject.org/archives/…Vendor Advisory
