Identity & Access Management

什么是零信任?

零信任是一种网络安全概念,假设即使在网络边界内部,也不应信任任何设备、用户或应用程序。只有在验证设备健康、身份和上下文后才授予访问权限。

什么是零信任?

零信任是一种网络安全概念,假设即使在网络边界内部,也不应信任任何设备、用户或应用程序。只有在验证设备健康、身份和上下文后才授予访问权限。

为什么零信任在网络安全中很重要

传统的基于边界的安全措施在攻击者通过窃取凭证获得访问权限后,妥协内部人员时会失效。零信任框架通过应用严格的身份验证来减少这些风险,以保护系统免受内部和外部威胁。

零信任的关键原则

  • 非常明确:验证每个用户、设备和操作。
  • 最小权限访问:仅授予用户所需的权限。
  • 假设已被攻破:持续监控和验证活动,以发现异常或不寻常的习惯。
  • 微分段:将网络划分为更小的部分,以减少攻击者造成更大破坏的风险。
  • 持续监控:应用安全分析和威胁检测。

零信任的好处

  • 提供更强的防御措施以防范内部威胁和凭证盗窃。
  • 如果发生泄露,限制损害。
  • 符合安全法规
  • 当出现可疑行为时,提前发出警报。
  • 适应混合和远程工作环境。

示例

在零信任实施中,员工连接到云服务时必须通过多因素认证(MFA)进行验证,以证明其设备符合安全标准后才能访问系统。即使在登录后,他们的行为也会被持续监控,以便在出现可疑行为时提前发出警报。

相关术语

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SAMPLE HANDOVER · ILLUSTRATIVE

Sample evidence handover

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VALIDATED FINDING Evidence attached

Server-Side Request Forgery in webhooks/receiver

demo-project/sample-app · src/webhooks/receiver.py:42

SeverityHigh CVSS 3.18.6 Priority79 Confirmedvia replay

Untrusted caller-supplied URLs reach an internal egress without an allowlist. Replayed in a sandbox against a fresh authorised target — the same control was validated to fail twice.

REVIEWER-READY REMEDIATION Merge-ready PR

Validate the target URL against an allowlist of permitted hostnames. Reject private/internal IP ranges. Enforce HTTPS only.

plexicus/remediation/webhooks-ssrf 3 changed · 0 new files
42resp = requests.get(target_url)
42+if not is_allowed_host(target_url):
43+  raise WebhookRejected(target_url)
44+resp = requests.get(target_url, timeout=5)
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