Vulnerability · Published Feb 12, 2021 · Assigned by f5
CVE-2021-22981
Medium 4.8
In plain English
A medium-severity security flaw in BIG-IP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS NVD)4.8Medium
Exploit odds (30 days)0.6%top 53.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
References
- https://support.f5.com/csp/article/K09121542 x_refsource_MISC