description: On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all versions of 12.1.x and 11.6.x, a flaw in the way reply ICMP packets are limited in the Traffic Management Microkernel (TMM) allows an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
problem types: CWE-330 Use of Insufficiently Random Values
affected:
{
product: BIG-IP
vendor: F5
versions:
status: affected, version: 12.1.x
status: affected, version: 11.6.x
lessThan: 17.0.x*, status: unaffected, version: 17.0.0, versionType: custom
lessThan: 16.1.2.2, status: affected, version: 16.1.x, versionType: custom
lessThan: 15.1.5.1, status: affected, version: 15.1.x, versionType: custom
lessThan: 14.1.4.6, status: affected, version: 14.1.x, versionType: custom
lessThan: 13.1.5, status: affected, version: 13.1.x, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 7.4
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
version: 3.1
]