CVE-2023-28434 MinIO MinIO: privilege escalation
In plain words: Something running with limited rights can promote itself to full control. Turns a small foothold (like a malicious app) into administrator or system-level access.
Confirmed exploited by CISA on · US federal patch deadline Oct 10, 2023
What to do
- Install MinIO's security update for MinIO. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
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: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- MinIO Security Feature Bypass Vulnerability
- Product
- MinIO MinIO
- CISA description
- MinIO contains a security feature bypass vulnerability that allows an attacker to use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket` to conduct privilege escalation. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access.
- Type of flaw
- Privilege escalation (CWE-269)
- Confirmed exploited
- Sep 19, 2023
- US federal patch deadline
- Oct 10, 2023
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Answering about CVE-2023-28434 ·
Questions about CVE-2023-28434
Is CVE-2023-28434 being exploited?
Yes. CISA added CVE-2023-28434 to its Known Exploited Vulnerabilities catalog on Sep 19, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-28434?
Install MinIO's security update for MinIO. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2023-28434?
Only if you use MinIO MinIO. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.