Home/CVE/On BIG-IP 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when negotiating IPSec tunnels with configured, authent
CVE

CVE-2020-5938

On BIG-IP 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when negotiating IPSec tunnels with configured, authent

On BIG-IP 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when negotiating IPSec tunnels with configured, authenticated peers, the peer may negotiate a different key length than the BIG-IP configuration would otherwise allow.

MEDIUM · CVSS 6.5 EPSS 0.00125
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-326Inadequate Encryption Strength
▤

Affected Products & Versions

42
f5 big-ip access policy manager>= 11.6.1 and <= 11.6.5.2
f5 big-ip access policy manager>= 12.1.0 and <= 12.1.5.2
f5 big-ip access policy manager>= 13.1.0 and <= 13.1.3.4
f5 big-ip advanced firewall manager>= 11.6.1 and <= 11.6.5.2
f5 big-ip advanced firewall manager>= 12.1.0 and <= 12.1.5.2
f5 big-ip advanced firewall manager>= 13.1.0 and <= 13.1.3.4
f5 big-ip advanced web application firewall>= 11.6.1 and <= 11.6.5.2
f5 big-ip advanced web application firewall>= 12.1.0 and <= 12.1.5.2
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · f5sirt@f5.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Oct 2020 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.f5.com/csp/article/K76610106Vendor Advisory
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