CVE-2021-22981

Description

On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

4.8

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.23%

Vendor Advisory f5.com

Affected: n/a BIG-IP

References

Link	Tags
https://support.f5.com/csp/article/K09121542	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22981?: CVE-2021-22981 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22981?: To fix CVE-2021-22981, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22981 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-22981 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22981?: CVE-2021-22981 affects n/a BIG-IP.

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