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F5 Networks Warning

1695
Classification
These posts contain security alerts, including digital loopholes, electronic attacks, technical updates, and they are classified base on the level of severity.

● Critical

● High

● Medium

● Low

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Warning Date

Severity Level

Warning Number

Target Sector

4 June, 2020

● High

2020-1316

All

Description:

F5 Networks has released a security update to address a vulnerability in the following products:

  • BIG-IP
    • 15.0.0 - 15.1.0
    • 14.1.0 - 14.1.2
    • 13.1.0 - 13.1.3
    • 11.6.1 - 11.6.5

Threats:

Attacker could exploit the vulnerability by trigger a Denial of Service (DoS) attack.

Best practice and Recommendations:

The F5 Networks team encourages users to review apply the following mitigation:

  • To prevent the BIG-IP system from being a tool in the attack, if you know the malicious domains being used with NXNSAttack, you can configure a Response Policy Zone (RPZ) to drop DNS traffic for these malicious domains.
  • To reduce the chances of the BIG-IP system becoming the target victim of the DoS attack, you can consider only providing DNS cache service to trusted users or networks.

For more information:

Last updated at 4 June, 2020

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