Exploited vulnerability · CISA KEV

Is CVE-2023-46747 exploited? Yes: in CISA KEV since 31 Oct 2023

Gociux · F5 BIG-IP Configuration Utility · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-46747, F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 31 Oct 2023, 5 days after it was published. It is known to be used in ransomware campaigns. It affects F5 BIG-IP Configuration Utility, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What it is

F5 BIG-IP Configuration utility contains an authentication bypass using an alternate path or channel vulnerability due to undisclosed requests that may allow an unauthenticated attacker with network access to the BIG-IP system through the management port and/or self IP addresses to execute system commands. This vulnerability can be used in conjunction with CVE-2023-46748.

What to do

1. Check whether you run it. Look for BIG-IP Configuration Utility in your asset inventory, including appliances and cloud images. Stack check lists every exploited F5 CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 26 Oct 2023.
4. Get told next time. Email alerts when CISA adds a CVE for F5.

Other exploited CVEs in BIG-IP Configuration Utility

• CVE-2023-46748: F5 BIG-IP Configuration Utility SQL Injection Vulnerability (31 Oct 2023)

References

• my.f5.com/manage/s/article/K000137353
• nvd.nist.gov/vuln/detail/CVE-2023-46747

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in October 2023 · F5 scorecard · act-now radar.