7.8

CVE-2021-22985: f5 big-ip_application_security_manager Uncontrolled Resource Consumption

CVSS: 7.8v2.0HighModified
Published 12-02-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-22985 is a high (CVSS 7.8) Uncontrolled Resource Consumption vulnerability in f5 big-ip_application_security_manager. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v2.0 (NVD)
EPSS score
1.01%
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. 12-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

On BIG-IP APM version 16.0.x before 16.0.1.1, under certain conditions, when processing VPN traffic with APM, TMM consumes excessive memory. A malicious, authenticated VPN user may abuse this to perform a DoS attack against the APM. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.01%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

0.00 pp

From 1.01% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.01%

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_application_security_manager≥ 11.6.1, < 11.6.5.2 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.2.8 | ≥ 15.1.0, < 15.1.2 | ≥ 16.0.0, < 16.0.1.1

1 vendor · 1 product

References

1 links