CVE-2025-9648
Denial of Service in CivetWeb
Summary
Denial of Service in CivetWeb
Original description
The description as published by the source.
A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests.
This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-9648 civetweb
- Ubuntu UBUNTU-CVE-2025-9648 civetweb
References
- advisory cert.pl
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- report github.com