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CVE-2020-5941

HIGHCVSS 7.5/10EPSS 1.03%

Last modified

CVE-2020-5941 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

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.

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
1.03%

59.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 15.1.0, < 15.1.1
F5Big-Ip Access Policy Manager>= 16.0.0, < 16.0.1
F5Big-Ip Advanced Firewall Manager>= 15.1.0, < 15.1.1
F5Big-Ip Advanced Firewall Manager>= 16.0.0, < 16.0.1
F5Big-Ip Analytics>= 15.1.0, < 15.1.1
F5Big-Ip Analytics>= 16.0.0, < 16.0.1
F5Big-Ip Application Acceleration Manager>= 15.1.0, < 15.1.1
F5Big-Ip Application Acceleration Manager>= 16.0.0, < 16.0.1
F5Big-Ip Application Security Manager>= 15.1.0, < 15.1.1
F5Big-Ip Application Security Manager>= 16.0.0, < 16.0.1
F5Big-Ip Domain Name System>= 15.1.0, < 15.1.1
F5Big-Ip Domain Name System>= 16.0.0, < 16.0.1
F5Big-Ip Fraud Protection Service>= 15.1.0, < 15.1.1
F5Big-Ip Fraud Protection Service>= 16.0.0, < 16.0.1
F5Big-Ip Global Traffic Manager>= 15.1.0, < 15.1.1
F5Big-Ip Global Traffic Manager>= 16.0.0, < 16.0.1
F5Big-Ip Link Controller>= 15.1.0, < 15.1.1
F5Big-Ip Link Controller>= 16.0.0, < 16.0.1
F5Big-Ip Local Traffic Manager>= 15.1.0, < 15.1.1
F5Big-Ip Local Traffic Manager>= 16.0.0, < 16.0.1
F5Big-Ip Policy Enforcement Manager>= 15.1.0, < 15.1.1
F5Big-Ip Policy Enforcement Manager>= 16.0.0, < 16.0.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-5941?
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.
How severe is CVE-2020-5941?
CVE-2020-5941 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5941?
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.

Are you affected by CVE-2020-5941?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST