Medium severity · published Nov 19, 2020
CVE-2020-5947
In versions 16.0.0-16.0.0.1 and 15.1.0-15.1.1, on specific BIG-IP platforms, attackers may be able to obtain TCP sequence numbers from the BIG-IP system that can be reused in…
4.3
CVSS
0.7%
EPSS
No
On KEV
Description
In versions 16.0.0-16.0.0.1 and 15.1.0-15.1.1, on specific BIG-IP platforms, attackers may be able to obtain TCP sequence numbers from the BIG-IP system that can be reused in future connections with the same source and destination port and IP numbers. Only these platforms are affected: BIG-IP 2000 series (C112), BIG-IP 4000 series (C113), BIG-IP i2000 series (C117), BIG-IP i4000 series (C115), BIG-IP Virtual Edition (VE).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% 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
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BA
Big-ip Advanced Web Application Firewall · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BA
Big-ip Analytics · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BA
Big-ip Application Security Manager · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BD
Big-ip Ddos Hybrid Defender · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BD
Big-ip Domain Name System · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BF
Big-ip Fraud Protection Service · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BG
Big-ip Global Traffic Manager · F5
15.0.0 through 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BL
Big-ip Link Controller · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BL
Big-ip Local Traffic Manager · F5
15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5947
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5947
Vendor Advisory
https://support.f5.com/csp/article/K64571774
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