4.4

CVE-2020-9497: apache guacamole Improper Input Validation

CVSS: 4.4v3.1MediumModified
AliasesUBUNTU-CVE-2020-9497DEBIAN-CVE-2020-9497
Published 02-07-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-9497 is a medium (CVSS 4.4) Improper Input Validation vulnerability in apache guacamole. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.2% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.4/10
010
Medium · v3.1 (NVD)
EPSS score
0.79%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-2435-1MGASA-2021-0272

Timeline

  1. 02-07-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to a malicious or compromised RDP server, specially-craftedPDUs could result in disclosure of information within the memory ofthe guacd process handling the connection.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

-0.01 pp

From 0.80% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.79%

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
Apache1 product
Fedoraproject1 product
Ubuntu1 product
  • guacamole-clientAll versions (No fix recorded)

4 vendors · 5 products

References

15 links
Show all 15 references