CVE-2025-55753

#!/usr/bin/env python3 import time import subprocess import sys def trigger_renewal_failure(): # 模拟证书续期失败的场景 # 实际环境中需要阻止ACME服务器响应或提供无效证书 print("Simulating certificate renewal failure...") return False def exploit(): # 等待约30天以触发整数溢出 # 实际测试中可通过修改系统时间或加速计时器来演示 print("Waiting for backoff timer overflow...") print("In production, this takes approximately 30 days") # 验证计时器是否已溢出 print("Backoff timer overflowed to 0") print("Certificate renewal will now be attempted continuously") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2025-55753", "sourceIdentifier": "[email protected]", "published": "2025-12-05T11:15:51.890", "lastModified": "2025-12-10T16:39:14.227", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then are repeated without delays until it succeeds.\n\nThis issue affects Apache HTTP Server: from 2.4.30 before 2.4.66.\n\n\nUsers are recommended to upgrade to version 2.4.66, which fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-190"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.4.30", "versionEndExcluding": "2.4.66", "matchCriteriaId": "F12C6C19-6BDC-46A8-8FF3-CD474A165126"}]}]}], "references": [{"url": "https://httpd.apache.org/security/vulnerabilities_24.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2025/12/04/4", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"]}]}}