CVE-2021-23034: f5 big-ip_access_policy_manager Improper Input Validation
Vulnerability summary
CVE-2021-23034 is a high (CVSS 7.5) Improper Input Validation vulnerability in f5 big-ip_access_policy_manager. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.8% of scored vulnerabilities.
Timeline
- 14-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
On BIG-IP version 16.x before 16.1.0 and 15.1.x before 15.1.3.1, when a DNS profile using a DNS cache resolver is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.95%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
0.00 pp
From 0.95% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-668Exposure of Resource to Wrong SphereThe product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
Affected systems
F511 products
- big-ip_access_policy_manager≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0
- big-ip_advanced_firewall_manager≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0
- big-ip_analytics≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0
- big-ip_application_acceleration_manager≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0
- big-ip_application_security_manager≥ 15.1.0, < 15.1.3.1 | ≥ 16.0.0, < 16.1.0
1 vendor · 11 products