Denial of Service in CivetWeb_CVE-2025-9648

8.7 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Description

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.

Basic Information

ID CVE-2025-9648

Source CERT-PL

Published Sep 29, 2025 at 11:47

Affected Product

Vendor CivetWeb

Product CivetWeb

Affected Versions CivetWeb CivetWeb 1.10

CWE Classification

CWE-158

References

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    "published": "2025-09-29T11:47:56.141Z",
    "modified": "2025-09-29T11:47:56.141Z",
    "type": "cve",
    "title": "Denial of Service in CivetWeb",
    "source": "CERT-PL",
    "references": "https://cert.pl/en/posts/2025/09/CVE-2025-9648\nhttps://github.com/civetweb/civetweb\nhttps://github.com/civetweb/civetweb/issues/1348\nhttps://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa51133",
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