6.5

CVE-2020-4033: canonical ubuntu_linux Out-of-bounds Read

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2020-4033DEBIAN-CVE-2020-4033
Published 22-06-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-4033 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 1.76% chance of exploitation in the next 30 days, higher than 77.6% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.76%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 6
DLA-3606-1MGASA-2020-0297OPENSUSE-SU-2020:1090-1OPENSUSE-SU-2024:10768-1RHSA-2021:1849SUSE-SU-2020:2032-1

Timeline

  1. 22-06-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

In FreeRDP before version 2.1.2, there is an out of bounds read in RLEDECOMPRESS. All FreeRDP based clients with sessions with color depth < 32 are affected. This is fixed in version 2.1.2.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.76%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

-0.07 pp

From 1.84% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.76%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Ubuntu2 products
  • freerdpAll versions (No fix recorded)
  • freerdp2< 2.2.0+dfsg1-0ubuntu0.18.04.1 | < 2.2.0+dfsg1-0ubuntu0.20.04.1
Canonical1 product
Fedoraproject1 product
Freerdp1 product
Opensuse1 product

6 vendors · 8 products

References

12 links
Show all 12 references