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CVE-2020-5941

HIGH
7.5
CVSS Score
Published: November 5, 2020 at 07:18 PM UTC
Updated: June 17, 2026 at 03:22 AM UTC
12 products affected across 1 vendorBig IP Access Policy ManagerBig IP Application Security ManagerBig IP Advanced Firewall Manager

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

On BIG-IP versions 16.0.0-16.0.0.1 and 15.1.0-15.1.0.5, using the RESOLV::lookup command within an iRule may cause the Traffic Management Microkernel (TMM) to generate a core file and restart. This issue occurs when data exceeding the maximum limit of a hostname passes to the RESOLV::lookup command.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Access Policy Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Advanced Firewall Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Analytics· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Application Acceleration Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Application Security Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Domain Name System· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Fraud Protection Service· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Global Traffic Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Link Controller· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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
Big IP Local Traffic Manager· F5
95%
15.1.0 ≤ v < 15.1.116.0.0 ≤ v < 16.0.1
Affected range stops below 15.1.1, 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

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://support.f5.com/csp/article/K03125360

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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