CVE-2026-43634 漏洞深度分析

漏洞概述

CVE 编号： CVE-2026-43634
CVSS 评分： 8.7（HIGH）
CVSS 向量： CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE 分类： CWE-348
漏洞状态： Deferred
发布时间： 2026-05-19T15:16:31.023
最后更新： 2026-07-14T21:16:53.917

漏洞描述

HestiaCP versions 1.2.0 through 1.9.4 contain an IP spoofing vulnerability that allows unauthenticated remote attackers to bypass authentication security controls by supplying an arbitrary IP address in the CF-Connecting-IP HTTP header without verifying the request originated from Cloudflare's network. Attackers can exploit this to circumvent fail2ban brute-force protection, bypass per-user IP allowlists, and poison authentication audit logs by spoofing trusted IP addresses on each request.

影响分析

此漏洞的具体影响取决于实际利用场景。"

修复建议

  1. 及时关注厂商发布的安全更新和补丁
  2. 升级受影响组件到最新版本
  3. 如无法立即升级，参考厂商提供的临时缓解措施
  4. 加强网络访问控制和监控

参考链接

  1. https://github.com/hestiacp/hestiacp/commit/f381e294500f671cf12716c638afd0bfde901f88
  2. https://github.com/hestiacp/hestiacp/issues/5229
  3. https://github.com/hestiacp/hestiacp/pull/5273
  4. https://mercuryiss.com.au/hestiacp-unauthenticated-rce-ip-spoofing-cve-2026-43633-cve-2026-43634
  5. https://www.vulncheck.com/advisories/hestiacp-ip-spoofing-via-cf-connecting-ip-header