CVE-2020-5947
MEDIUM
4.3
CVSS Score
Published: November 19, 2020 at 12:14 AM UTC
Updated: June 17, 2026 at 03:22 AM UTC
20 products affected across 1 vendorBig IP Access Policy ManagerBig IP Application Security ManagerBig IP Advanced Firewall Manager
Using BIG-IP 2000 series (C112), BIG-IP 4000 series (C113), BIG-IP i2000 series (C117), BIG-IP i4000 series (C115), BIG-IP Virtual Edition (VE) by N/A?
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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%
Description
In versions 16.0.0-16.0.0.1 and 15.1.0-15.1.1, on specific BIG-IP platforms, attackers may be able to obtain TCP sequence numbers from the BIG-IP system that can be reused in future connections with the same source and destination port and IP numbers. Only these platforms are affected: BIG-IP 2000 series (C112), BIG-IP 4000 series (C113), BIG-IP i2000 series (C117), BIG-IP i4000 series (C115), BIG-IP Virtual Edition (VE).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v < 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
15.0.0 ≤ v ≤ 15.1.216.0.0 ≤ v < 16.0.1
Affected range stops below 16.0.1, so it looks safe — our inference, not a vendor statement
f5-big-ip-2000 (environment) · f5-big-ip-4000 (environment) · f5-big-ip-i2000 (environment) · f5-big-ip-i4000 (environment) · f5-big-ip-virtual-edition (environment)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://support.f5.com/csp/article/K64571774CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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