Vulnerability Name:

CVE-2020-5871 (CCN-181312)

Assigned:2020-04-29
Published:2020-04-29
Updated:2020-05-05
Summary:On BIG-IP 14.1.0-14.1.2.3, undisclosed requests can lead to a denial of service (DoS) when sent to BIG-IP HTTP/2 virtual servers. The problem can occur when ciphers, which have been blacklisted by the HTTP/2 RFC, are used on backend servers. This is a data-plane issue. There is no control-plane exposure.
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
7.5 High (CCN 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 (CCN 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
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
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-2020-5871

Source: XF
Type: UNKNOWN
f5-cve20205871-dos(181312)

Source: CCN
Type: F5 Security Advisory K43450419
TMM vulnerability CVE-2020-5871

Source: MISC
Type: Vendor Advisory
https://support.f5.com/csp/article/K43450419

Vulnerable Configuration:Configuration 1:
  • cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 2:
  • cpe:/a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 3:
  • cpe:/a:f5:big-ip_analytics:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 4:
  • cpe:/a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 5:
  • cpe:/a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 6:
  • cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 7:
  • cpe:/a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 8:
  • cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 9:
  • cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 10:
  • cpe:/a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration 11:
  • cpe:/a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and <= 14.1.2.3)

    • Configuration CCN 1:
  • cpe:/a:f5:big-ip:14.1.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    f5 big-ip access policy manager *
    f5 big-ip advanced firewall manager *
    f5 big-ip analytics *
    f5 big-ip application acceleration manager *
    f5 big-ip application security manager *
    f5 big-ip domain name system *
    f5 big-ip fraud protection service *
    f5 big-ip global traffic manager *
    f5 big-ip link controller *
    f5 big-ip local traffic manager *
    f5 big-ip policy enforcement manager *
    f5 big-ip 14.1.0