CVE-2020-27720

published 2020-12-24

CVE-2020-27720: On BIG-IP LTM/CGNAT version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, and 13.1.0-13.1.3.5, when processing NAT66 traffic with Port Block Allocation…

Priority P3 39 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I N A H

On BIG-IP LTM/CGNAT version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, and 13.1.0-13.1.3.5, when processing NAT66 traffic with Port Block Allocation (PBA) mode and SP-DAG enabled, and dag-ipv6-prefix-len configured with a value less than the default of 128, an undisclosed traffic pattern may cause the Traffic Management Microkernel (TMM) to restart.

Affected

11 ranges

Vendor	Product	Version range	Fixed in
big-ip_ltm	cgnat	—	—
f5	big-ip_carrier-grade_nat	13.1.0 – 13.1.3	—
f5	big-ip_carrier-grade_nat	>= 14.1.0 < 14.1.3.1	14.1.3.1
f5	big-ip_carrier-grade_nat	>= 15.1.0 < 15.1.1	15.1.1
f5	big-ip_carrier-grade_nat	>= 16.0.0 < 16.0.1	16.0.1
f5	big-ip_cgnat	—	—
f5	big-ip_local_traffic_manager	13.1.0 – 13.1.3	—
f5	big-ip_local_traffic_manager	>= 14.1.0 < 14.1.3.1	14.1.3.1
f5	big-ip_local_traffic_manager	>= 15.1.0 < 15.1.1	15.1.1
f5	big-ip_local_traffic_manager	>= 16.0.0 < 16.0.1	16.0.1
f5	big-ip_ltm	—	—

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd v2.0 4.3 MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P

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