Vulnerability Name:

CVE-2021-23050 (CCN-208085)

Assigned:2021-08-24
Published:2021-08-24
Updated:2021-09-27
Summary:On BIG-IP Advanced WAF and BIG-IP ASM version 16.0.x before 16.0.1.2 and 15.1.x before 15.1.3 and NGINX App Protect on all versions before 3.5.0, when a cross-site request forgery (CSRF)-enabled policy is configured on a virtual server, an undisclosed HTML response may cause the bd process to terminate.
Note: Software versions which have reached End of Technical Support (EoTS) 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: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
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-2021-23050

Source: XF
Type: UNKNOWN
f5-cve202123050-dos(208085)

Source: CCN
Type: F5 Security Advisory K44553214
Advanced WAF and BIG-IP ASM vulnerability CVE-2021-23050

Source: MISC
Type: Vendor Advisory
https://support.f5.com/csp/article/K44553214

Vulnerable Configuration:Configuration 1:
  • cpe:/a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* (Version >= 15.1.0 and < 15.1.3.1)
  • OR cpe:/a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* (Version >= 16.0.0 and < 16.0.1.2)
  • OR cpe:/a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* (Version >= 15.1.0 and < 15.1.3.1)
  • OR cpe:/a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* (Version >= 16.0.0 and < 16.0.1.2)
  • OR cpe:/a:f5:nginx_app_protect:*:*:*:*:*:*:*:* (Version >= 1.0.0 and <= 1.3.0)
  • OR cpe:/a:f5:nginx_app_protect:*:*:*:*:*:*:*:* (Version >= 2.0.0 and <= 2.3.0)
  • OR cpe:/a:f5:nginx_app_protect:*:*:*:*:*:*:*:* (Version >= 3.0.0 and < 3.5.0)

    • Configuration CCN 1:
  • cpe:/o:f5:big-ip:15.1.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    f5 big-ip advanced web application firewall *
    f5 big-ip advanced web application firewall *
    f5 big-ip application security manager *
    f5 big-ip application security manager *
    f5 nginx app protect *
    f5 nginx app protect *
    f5 nginx app protect *
    f5 big-ip 15.1.0