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PatchSiren cyber security CVE debrief

CVE-2023-46747 F5 CVE debrief

CVE-2023-46747 affects the F5 BIG-IP Configuration Utility and is described as an authentication bypass vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-31, and the KEV record notes known ransomware campaign use. Because the source corpus identifies this as a known exploited issue, defenders should treat it as urgent and follow vendor guidance immediately; if mitigations are unavailable, CISA’s guidance is to discontinue use of the product.

Vendor
F5
Product
BIG-IP Configuration Utility
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-10-31
Original CVE updated
2023-10-31
Advisory published
2023-10-31
Advisory updated
2023-10-31

Who should care

Organizations using F5 BIG-IP Configuration Utility, especially teams responsible for internet-facing administration, network security appliances, and emergency vulnerability response. Security operations, infrastructure, and incident response teams should prioritize this CVE because it appears in CISA’s KEV catalog.

Technical summary

The available source material identifies the vulnerability as an authentication bypass in F5 BIG-IP Configuration Utility. No version ranges, exploitation prerequisites, or patch details are provided in the supplied corpus. The most important technical fact available here is that CISA lists the CVE in KEV, which indicates confirmed real-world exploitation, and the KEV metadata also marks known ransomware campaign use.

Defensive priority

Highest priority. CISA added the CVE to KEV on 2023-10-31 with a remediation due date of 2023-11-21, so organizations should treat this as an active exploitation risk and address it immediately.

Recommended defensive actions

  • Apply mitigations per vendor instructions referenced by F5 and CISA.
  • If mitigations are unavailable, discontinue use of the product until a safe remediation path is available.
  • Validate whether any BIG-IP Configuration Utility instances are exposed or in active use in your environment.
  • Prioritize incident response review for affected systems because CISA marks this CVE as known exploited and associated with known ransomware campaign use.
  • Monitor vendor and CISA guidance for any updates tied to CVE-2023-46747.

Evidence notes

This debrief is based only on the supplied corpus: the CVE title/description, CISA KEV metadata, and the official resource links provided. The corpus states that CVE-2023-46747 is an F5 BIG-IP Configuration Utility authentication bypass vulnerability, that CISA added it to KEV on 2023-10-31, that the remediation due date is 2023-11-21, and that known ransomware campaign use is marked as 'Known.' The supplied metadata also includes CISA’s instruction to apply vendor mitigations or discontinue use of the product if mitigations are unavailable. No CVSS score or version-specific remediation details were provided in the source corpus.

Official resources

CVE published and modified on 2023-10-31. CISA KEV date added: 2023-10-31. KEV due date: 2023-11-21.