7.5

CVE-2021-23032: f5 big-ip_domain_name_system Improper Input Validation

CVSS: 7.5v3.1HighModified
Published 14-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-23032 is a high (CVSS 7.5) Improper Input Validation vulnerability in f5 big-ip_domain_name_system. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.93%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-09-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

On version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.4, and all versions of 13.1.x and 12.1.x, when a BIG-IP DNS system is configured with non-default Wide IP and pool settings, undisclosed DNS responses can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.93%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.93% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.93%

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

F51 product
  • big-ip_domain_name_system≥ 12.1.0, ≤ 12.1.6 | ≥ 13.1.0, ≤ 13.1.4 | ≥ 14.1.0, < 14.1.4.4 | ≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0

1 vendor · 1 product

References

1 links