Vulnerability Name:

CVE-2020-27725 (CCN-193756)

Assigned:2020-12-16
Published:2020-12-16
Updated:2021-07-21
Summary:In version 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2 of BIG-IP DNS, GTM, and Link Controller, zxfrd leaks memory when listing DNS zones. Zones can be listed via TMSH, iControl or SNMP; only users with access to those services can trigger this vulnerability.
CVSS v3 Severity:4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:3.5 Low (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-772
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-27725

Source: XF
Type: UNKNOWN
f5-cve202027725-dos(193756)

Source: CCN
Type: F5 Security Advisory K25595031
zxfrd vulnerability CVE-2020-27725

Source: MISC
Type: Vendor Advisory
https://support.f5.com/csp/article/K25595031

Vulnerable Configuration:Configuration 1:
  • cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 11.6.1 and <= 11.6.5)
  • OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 12.1.0 and <= 12.1.5)
  • OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 13.1.0 and < 13.1.3.5)
  • OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 14.1.0 and < 14.1.3.1)
  • OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.1.1)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 11.6.1 and <= 11.6.5)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 12.1.0 and <= 12.1.5)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 13.1.0 and < 13.1.3.5)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and < 14.1.3.1)
  • OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.1.1)
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 11.6.1 and <= 11.6.5)
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 12.1.0 and <= 12.1.5)
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.1.1)
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 13.1.0 and < 13.1.3.5)
  • OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 14.1.0 and < 14.1.3.1)

    • Configuration CCN 1:
  • cpe:/a:f5:big-ip:11.6.1:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:11.6.5:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:12.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:12.1.5:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:13.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:13.1.3:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:14.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:15.0.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:15.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:11.6.1:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:11.6.5:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:12.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:12.1.5:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:13.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:13.1.3:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:14.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:15.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip_global_traffic_manager:15.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:15.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:14.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:13.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:13.1.3:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:12.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:12.1.5:*:*:*:*:*:*:*
  • OR cpe:/a:f5:big-ip:11.6.1:*:*:*:*:*:*:*
  • OR cpe:/o:f5:big-ip:11.6.5:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    f5 big-ip domain name system *
    f5 big-ip domain name system *
    f5 big-ip domain name system *
    f5 big-ip domain name system *
    f5 big-ip domain name system *
    f5 big-ip global traffic manager *
    f5 big-ip global traffic manager *
    f5 big-ip global traffic manager *
    f5 big-ip global traffic manager *
    f5 big-ip global traffic manager *
    f5 big-ip link controller *
    f5 big-ip link controller *
    f5 big-ip link controller *
    f5 big-ip link controller *
    f5 big-ip link controller *
    f5 big-ip 11.6.1
    f5 big-ip 11.6.5
    f5 big-ip 12.1.0
    f5 big-ip 12.1.5
    f5 big-ip 13.1.0
    f5 big-ip 13.1.3
    f5 big-ip 14.1.0
    f5 big-ip 15.0.0
    f5 big-ip 15.1.0
    f5 big-ip global traffic manager 11.6.1
    f5 big-ip global traffic manager 11.6.5
    f5 big-ip global traffic manager 12.1.0
    f5 big-ip global traffic manager 12.1.5
    f5 big-ip global traffic manager 13.1.0
    f5 big-ip global traffic manager 13.1.3
    f5 big-ip global traffic manager 14.1.0
    f5 big-ip global traffic manager 15.0.0
    f5 big-ip global traffic manager 15.1.0
    f5 big-ip 15.0.0
    f5 big-ip 14.1.0
    f5 big-ip 13.1.0
    f5 big-ip 13.1.3
    f5 big-ip 12.1.0
    f5 big-ip 12.1.5
    f5 big-ip 11.6.1
    f5 big-ip 11.6.5