Vulnerability Name:

CVE-2021-23000 (CCN-199212)

Assigned:2021-03-22
Published:2021-03-22
Updated:2021-04-05
Summary:On BIG-IP versions 13.1.3.4-13.1.3.6 and 12.1.5.2, if the tmm.http.rfc.enforcement BigDB key is enabled in a BIG-IP system, or the Bad host header value is checked in the AFM HTTP security profile associated with a virtual server, in rare instances, a specific sequence of malicious requests may cause TMM to restart.
Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-23000

Source: XF
Type: UNKNOWN
f5-cve202123000-dos(199212)

Source: CCN
Type: F5 Security Advisory K34441555
BIG-IP TMM vulnerability CVE-2021-23000

Source: MISC
Type: Vendor Advisory
https://support.f5.com/csp/article/K34441555

Vulnerable Configuration:Configuration 1:
  • cpe:/a:f5:big-ip_access_policy_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_advanced_firewall_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_advanced_web_application_firewall:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_analytics:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_analytics:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_application_acceleration_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_application_security_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_ddos_hybrid_defender:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_domain_name_system:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_fraud_protection_service:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_link_controller:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_local_traffic_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:big-ip_policy_enforcement_manager:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)
  • OR cpe:/a:f5:ssl_orchestrator:12.1.5.2:*:*:*:*:*:*:*
  • OR cpe:/a:f5:ssl_orchestrator:*:*:*:*:*:*:*:* (Version >= 13.1.3.4 and < 13.1.3.6)

    • Configuration CCN 1:
  • cpe:/a:f5:big-ip:12.1.5.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    f5 big-ip access policy manager 12.1.5.2
    f5 big-ip access policy manager *
    f5 big-ip advanced firewall manager 12.1.5.2
    f5 big-ip advanced firewall manager *
    f5 big-ip advanced web application firewall 12.1.5.2
    f5 big-ip advanced web application firewall *
    f5 big-ip analytics 12.1.5.2
    f5 big-ip analytics *
    f5 big-ip application acceleration manager 12.1.5.2
    f5 big-ip application acceleration manager *
    f5 big-ip application security manager 12.1.5.2
    f5 big-ip application security manager *
    f5 big-ip ddos hybrid defender 12.1.5.2
    f5 big-ip ddos hybrid defender *
    f5 big-ip domain name system 12.1.5.2
    f5 big-ip domain name system *
    f5 big-ip fraud protection service 12.1.5.2
    f5 big-ip fraud protection service *
    f5 big-ip global traffic manager 12.1.5.2
    f5 big-ip global traffic manager *
    f5 big-ip link controller 12.1.5.2
    f5 big-ip link controller *
    f5 big-ip local traffic manager 12.1.5.2
    f5 big-ip local traffic manager *
    f5 big-ip policy enforcement manager 12.1.5.2
    f5 big-ip policy enforcement manager *
    f5 ssl orchestrator 12.1.5.2
    f5 ssl orchestrator *
    f5 big-ip 12.1.5.2