Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-22981

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/02/2021
Last modified:
19/02/2021

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.80 MEDIUM
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

Base Score 3.x
4.80
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
5.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* 12.1.0 (including) 12.1.5 (including)
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* 11.6.1 (including) 11.6.5 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools