High severity · published Aug 26, 2020
CVE-2020-5921
in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of MCPD context messages…
7.5
CVSS
1%
EPSS
No
On KEV
Description
in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of MCPD context messages destined to secondary blades consuming memory leading to MCPD failure. This issue affects only VIPRION hosts with two or more blades installed. Single-blade VIPRION hosts are not affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
Big-ip Access Policy Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BA
Big-ip Analytics · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BA
Big-ip Application Security Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BD
Big-ip Domain Name System · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BF
Big-ip Fraud Protection Service · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BG
Big-ip Global Traffic Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BL
Big-ip Link Controller · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BL
Big-ip Local Traffic Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
BP
Big-ip Policy Enforcement Manager · F5
12.1.0 before 12.1.5.2; 14.1.0 before 14.1.2.7; 15.0.0 before 15.0.1.4; 15.1.0 before 15.1.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5921
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5921
Vendor Advisory
https://support.f5.com/csp/article/K00103216
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