CVE-2021-23053: f5 big-ip_advanced_web_application_firewall Uncontrolled Resource Consumption
Vulnerability summary
CVE-2021-23053 is a medium (CVSS 5.3) Uncontrolled Resource Consumption vulnerability in f5 big-ip_advanced_web_application_firewall. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.8% of scored vulnerabilities.
Timeline
- 14-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
On version 15.1.x before 15.1.3, 14.1.x before 14.1.3.1, and 13.1.x before 13.1.3.6, when the brute force protection feature of BIG-IP Advanced WAF or BIG-IP ASM is enabled on a virtual server and the virtual server is under brute force attack, the MySQL database may run out of disk space due to lack of row limit on undisclosed tables in the MYSQL database. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.92%
Chance of exploitation in the next 30 days
Percentile
60%
Versus all other CVEs
30-day change
0.00 pp
From 0.92% 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-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
Affected systems
F52 products
- big-ip_advanced_web_application_firewall≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.1.0, < 15.1.3
- big-ip_application_security_manager≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.1.0, < 15.1.3
1 vendor · 2 products