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[email protected]CVE-2021-22981

HistoryFeb 12, 2021 - 6:15 p.m.

CVE-2021-22981

2021-02-1218:15:00

NVD-CWE-noinfo

[email protected]

web.nvd.nist.gov

cve-2021-22981

big-ip

tls

ems

rfc 7627

nvd

vulnerability

mitigation

man-in-the-middle attack

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

4.9 Medium

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.001 Low

EPSS

Percentile

27.9%

JSON

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.

CPENameOperatorVersion
f5:big-ip_local_traffic_managerf5 big-ip local traffic managerle12.1.5
f5:big-ip_advanced_firewall_managerf5 big-ip advanced firewall managerle12.1.5
f5:big-ip_application_acceleration_managerf5 big-ip application acceleration managerle12.1.5
f5:big-ip_analyticsf5 big-ip analyticsle12.1.5
f5:big-ip_access_policy_managerf5 big-ip access policy managerle12.1.5
f5:big-ip_application_security_managerf5 big-ip application security managerle12.1.5
f5:big-ip_fraud_protection_servicef5 big-ip fraud protection servicele12.1.5
f5:big-ip_global_traffic_managerf5 big-ip global traffic managerle12.1.5
f5:big-ip_link_controllerf5 big-ip link controllerle12.1.5
f5:big-ip_policy_enforcement_managerf5 big-ip policy enforcement managerle12.1.5

CPE	Name	Operator	Version
f5:big-ip_local_traffic_manager	f5 big-ip local traffic manager	le	12.1.5
f5:big-ip_advanced_firewall_manager	f5 big-ip advanced firewall manager	le	12.1.5
f5:big-ip_application_acceleration_manager	f5 big-ip application acceleration manager	le	12.1.5
f5:big-ip_analytics	f5 big-ip analytics	le	12.1.5
f5:big-ip_access_policy_manager	f5 big-ip access policy manager	le	12.1.5
f5:big-ip_application_security_manager	f5 big-ip application security manager	le	12.1.5
f5:big-ip_fraud_protection_service	f5 big-ip fraud protection service	le	12.1.5
f5:big-ip_global_traffic_manager	f5 big-ip global traffic manager	le	12.1.5
f5:big-ip_link_controller	f5 big-ip link controller	le	12.1.5
f5:big-ip_policy_enforcement_manager	f5 big-ip policy enforcement manager	le	12.1.5

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References

support.f5.com/csp/article/K09121542

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

4.9 Medium

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.001 Low

EPSS

Percentile

27.9%

JSON

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