MinIO Security Feature Bypass Vulnerability (CVE-2023-28434)
Severity: high · Patch status: patched · Since 2023-09-19 · CVE-2023-28434
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. CISA added CVE-2023-28434 to its Known Exploited Vulnerabilities catalog on Sep 19, 2023, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Oct 10, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
