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CVE-2019-6684

HIGHCVSS 7.5/10EPSS 1.04%

Last modified

CVE-2019-6684 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On versions 15.0.0-15.0.1.1, 14.0.0-14.1.2.2, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, under certain conditions, a multi-bladed BIG-IP Virtual Clustered Multiprocessing (vCMP) may drop broadcast packets when they are rebroadcast to the vCMP guest secondary blades. An attacker can leverage the fragmented broadcast IP packets to perform any type of fragmentation-based attack.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

On versions 15.0.0-15.0.1.1, 14.0.0-14.1.2.2, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, under certain conditions, a multi-bladed BIG-IP Virtual Clustered Multiprocessing (vCMP) may drop broadcast packets when they are rebroadcast to the vCMP guest secondary blades. An attacker can leverage the fragmented broadcast IP packets to perform any type of fragmentation-based attack.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.04%

59.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Access Policy Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Access Policy Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Access Policy Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Access Policy Manager>= 15.0.0, < 15.1.0
F5Big-Ip Advanced Firewall Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Advanced Firewall Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Advanced Firewall Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Advanced Firewall Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Advanced Firewall Manager>= 15.0.0, < 15.1.0
F5Big-Ip Analytics>= 11.5.2, <= 11.6.5
F5Big-Ip Analytics>= 12.1.0, <= 12.1.5
F5Big-Ip Analytics>= 13.0.0, < 13.1.3.2
F5Big-Ip Analytics>= 14.0.0, < 14.1.2.3
F5Big-Ip Analytics>= 15.0.0, < 15.1.0
F5Big-Ip Application Acceleration Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Application Acceleration Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Application Acceleration Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Application Acceleration Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Application Acceleration Manager>= 15.0.0, < 15.1.0
F5Big-Ip Application Security Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Application Security Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Application Security Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Application Security Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Application Security Manager>= 15.0.0, < 15.1.0
F5Big-Ip Domain Name System>= 11.5.2, <= 11.6.5
F5Big-Ip Domain Name System>= 12.1.0, <= 12.1.5
F5Big-Ip Domain Name System>= 13.0.0, < 13.1.3.2
F5Big-Ip Domain Name System>= 14.0.0, < 14.1.2.3
F5Big-Ip Domain Name System>= 15.0.0, < 15.1.0
F5Big-Ip Fraud Protection Service>= 11.5.2, <= 11.6.5
F5Big-Ip Fraud Protection Service>= 12.1.0, <= 12.1.5
F5Big-Ip Fraud Protection Service>= 13.0.0, < 13.1.3.2
F5Big-Ip Fraud Protection Service>= 14.0.0, < 14.1.2.3
F5Big-Ip Fraud Protection Service>= 15.0.0, < 15.1.0
F5Big-Ip Global Traffic Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Global Traffic Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Global Traffic Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Global Traffic Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Global Traffic Manager>= 15.0.0, < 15.1.0
F5Big-Ip Link Controller>= 11.5.2, <= 11.6.5
F5Big-Ip Link Controller>= 12.1.0, <= 12.1.5
F5Big-Ip Link Controller>= 13.0.0, < 13.1.3.2
F5Big-Ip Link Controller>= 14.0.0, < 14.1.2.3
F5Big-Ip Link Controller>= 15.0.0, < 15.1.0
F5Big-Ip Local Traffic Manager>= 11.5.2, <= 11.6.5
F5Big-Ip Local Traffic Manager>= 12.1.0, <= 12.1.5
F5Big-Ip Local Traffic Manager>= 13.0.0, < 13.1.3.2
F5Big-Ip Local Traffic Manager>= 14.0.0, < 14.1.2.3
F5Big-Ip Local Traffic Manager>= 15.0.0, < 15.1.0

Showing 50 of 55 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-6684?
On versions 15.0.0-15.0.1.1, 14.0.0-14.1.2.2, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, under certain conditions, a multi-bladed BIG-IP Virtual Clustered Multiprocessing (vCMP) may drop broadcast packets when they are rebroadcast to the vCMP guest secondary blades. An attacker can leverage the fragmented broadcast IP packets to perform any type of fragmentation-based attack.
How severe is CVE-2019-6684?
CVE-2019-6684 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.
How do I fix CVE-2019-6684?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST