Resource exhaustion in F5 Big-ip_access_policy_manager

CVE-2019-11479

Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to caus…

EPSS: 0.917 (99.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-11479?
CVE-2019-11479 is a high-severity vulnerability in F5 Big-ip_access_policy_manager, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 7.5/10. Published 2019-06-19.
How severe is CVE-2019-11479?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-11479 known to be exploited?
7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.