CVE-2020-5947
First published: Thu Nov 19 2020(Updated: )
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).
Credit: f5sirt@f5.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| F5 Access Policy Manager | >=15.0.0<15.1.2 | |
| F5 Access Policy Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP Advanced Firewall Manager | >=15.0.0<15.1.2 | |
| F5 BIG-IP Advanced Firewall Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP Advanced WAF/ASM | >=15.0.0<15.1.2 | |
| F5 BIG-IP Advanced WAF/ASM | >=16.0.0<16.0.1 | |
| F5 BIG-IP Analytics | >=15.0.0<15.1.2 | |
| F5 BIG-IP Analytics | >=16.0.0<16.0.1 | |
| F5 BIG-IP Application Acceleration Manager | >=15.0.0<15.1.2 | |
| F5 BIG-IP Application Acceleration Manager | >=16.0.0<16.0.1 | |
| F5 Application Security Manager | >=15.0.0<15.1.2 | |
| F5 Application Security Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP DDoS Hybrid Defender | >=15.0.0<15.1.2 | |
| F5 BIG-IP DDoS Hybrid Defender | >=16.0.0<16.0.1 | |
| F5 BIG-IP | >=15.0.0<15.1.2 | |
| F5 BIG-IP | >=16.0.0<16.0.1 | |
| F5 BIG-IP Fraud Protection Service | >=15.0.0<15.1.2 | |
| F5 BIG-IP Fraud Protection Service | >=16.0.0<16.0.1 | |
| Riverbed SteelApp Traffic Manager | >=15.0.0<=15.1.2 | |
| Riverbed SteelApp Traffic Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP Link Controller | >=15.0.0<15.1.2 | |
| F5 BIG-IP Link Controller | >=16.0.0<16.0.1 | |
| Riverbed SteelApp Traffic Manager | >=15.0.0<15.1.2 | |
| Riverbed SteelApp Traffic Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP Policy Enforcement Manager | >=15.0.0<15.1.2 | |
| F5 BIG-IP Policy Enforcement Manager | >=16.0.0<16.0.1 | |
| F5 BIG-IP SSL Orchestrator | >=15.0.0<15.1.2 | |
| F5 BIG-IP SSL Orchestrator | >=16.0.0<16.0.1 | |
| F5 BIG-IP Virtual Edition | ||
| F5 R2000 | =c112 | |
| F5 BIG-IP 4000 | =c113 | |
| F5 BIG-IP i2000s | =c117 | |
| F5 BIG-IP i4000 | =c115 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-5947?
CVE-2020-5947 has a medium severity rating due to the potential for attackers to exploit TCP sequence numbers.
How do I fix CVE-2020-5947?
To fix CVE-2020-5947, upgrade to a version of F5 BIG-IP software higher than 16.0.1 or 15.1.2.
Which F5 BIG-IP platforms are affected by CVE-2020-5947?
CVE-2020-5947 affects specific BIG-IP platforms running versions 15.0.0 to 15.1.1 and 16.0.0 to 16.0.0.1.
What types of attacks are possible with CVE-2020-5947?
With CVE-2020-5947, attackers may be able to reuse valid TCP sequence numbers, potentially leading to session hijacking.
Is CVE-2020-5947 a remote vulnerability?
Yes, CVE-2020-5947 is a remote vulnerability, allowing attackers to exploit it without physical access to the affected systems.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/references
- agent/last-modified-date
- agent/author
- agent/first-publish-date
- agent/description
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/f5
- canonical/f5 access policy manager
- version/f5 access policy manager/15.0.0
- version/f5 access policy manager/16.0.0
- canonical/f5 big-ip advanced firewall manager
- version/f5 big-ip advanced firewall manager/15.0.0
- version/f5 big-ip advanced firewall manager/16.0.0
- canonical/f5 big-ip advanced waf/asm
- version/f5 big-ip advanced waf/asm/15.0.0
- version/f5 big-ip advanced waf/asm/16.0.0
- canonical/f5 big-ip analytics
- version/f5 big-ip analytics/15.0.0
- version/f5 big-ip analytics/16.0.0
- canonical/f5 big-ip application acceleration manager
- version/f5 big-ip application acceleration manager/15.0.0
- version/f5 big-ip application acceleration manager/16.0.0
- canonical/f5 application security manager
- version/f5 application security manager/15.0.0
- version/f5 application security manager/16.0.0
- canonical/f5 big-ip ddos hybrid defender
- version/f5 big-ip ddos hybrid defender/15.0.0
- version/f5 big-ip ddos hybrid defender/16.0.0
- canonical/f5 big-ip
- version/f5 big-ip/15.0.0
- version/f5 big-ip/16.0.0
- canonical/f5 big-ip fraud protection service
- version/f5 big-ip fraud protection service/15.0.0
- version/f5 big-ip fraud protection service/16.0.0
- canonical/riverbed steelapp traffic manager
- version/riverbed steelapp traffic manager/15.0.0
- version/riverbed steelapp traffic manager/15.1.2
- version/riverbed steelapp traffic manager/16.0.0
- canonical/f5 big-ip link controller
- version/f5 big-ip link controller/15.0.0
- version/f5 big-ip link controller/16.0.0
- canonical/f5 big-ip policy enforcement manager
- version/f5 big-ip policy enforcement manager/15.0.0
- version/f5 big-ip policy enforcement manager/16.0.0
- canonical/f5 big-ip ssl orchestrator
- version/f5 big-ip ssl orchestrator/15.0.0
- version/f5 big-ip ssl orchestrator/16.0.0
- canonical/f5 big-ip virtual edition
- canonical/f5 r2000
- version/f5 r2000/c112
- canonical/f5 big-ip 4000
- version/f5 big-ip 4000/c113
- canonical/f5 big-ip i2000s
- version/f5 big-ip i2000s/c117
- canonical/f5 big-ip i4000
- version/f5 big-ip i4000/c115