CVE-2023-46747 F5 BIG-IP Configuration Utility: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Nov 21, 2023
What to do
- Install F5's security update for BIG-IP Configuration Utility. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
- Product
- F5 BIG-IP Configuration Utility
- CISA description
- 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.
- Type of flaw
- Login or permission bypass (CWE-288)
- Confirmed exploited
- Oct 31, 2023 — known to be used in ransomware attacks
- US federal patch deadline
- Nov 21, 2023
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Answering about CVE-2023-46747 ·
Questions about CVE-2023-46747
Is CVE-2023-46747 being exploited?
Yes. CISA added CVE-2023-46747 to its Known Exploited Vulnerabilities catalog on Oct 31, 2023, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2023-46747?
Install F5's security update for BIG-IP Configuration Utility. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2023-46747?
Only if you use F5 BIG-IP Configuration Utility. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.