Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2021-22981

Disclosure Date: February 12, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
4.8 Medium
Impact Score:
2.5
Exploitability Score:
2.2
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
Low
Availability (A):
None

General Information

Vendors

  • f5

Products

  • big-ip access policy manager,
  • big-ip advanced firewall manager,
  • big-ip advanced web application firewall,
  • big-ip analytics,
  • big-ip application acceleration manager,
  • big-ip application security manager,
  • big-ip ddos hybrid defender,
  • big-ip domain name system,
  • big-ip fraud protection service,
  • big-ip global traffic manager,
  • big-ip link controller,
  • big-ip local traffic manager,
  • big-ip policy enforcement manager,
  • big-ip ssl orchestrator

Additional Info

Technical Analysis