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The CVE-2023-24998 vulnerability in Apache Commons FileUpload arises due to insufficient limits on multipart headers during file upload processing. Attackers can exploit this by sending crafted requests with excessively large headers or malformed multipart data, causing uncontrolled memory allocation. This leads to server resource exhaustion, resulting in a Denial of Service (DoS) condition. The flaw affects versions 1.0 to 1.5 and 2.0.0-M1 to 2.0.0-M3. The fix enforces strict size limits on headers and improves parsing logic to prevent resource exhaustion.
DailyCVE Form:
Platform: Apache Commons
Version: 1.0-1.5, 2.0.0-M1-M3
Vulnerability: DoS
Severity: Critical
Date: 2023-01-10
Prediction: Patch expected 2023-02-15
What Undercode Say:
Check vulnerable versions mvn dependency:tree | grep commons-fileupload Exploit PoC (simulated DoS) curl -X POST -H "Content-Type: multipart/form-data" --data-binary @large_header_file.txt http://target/upload
How Exploit:
- Send oversized multipart headers.
- Flood server with malformed uploads.
- Trigger memory exhaustion.
Protection from this CVE:
- Upgrade to v1.6 or 2.0.0-M4.
- Enforce request size limits.
- Use WAF filtering.
Impact:
- Service disruption.
- Resource starvation.
- Unauthorized downtime.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
