標籤：Apache

如何解決 TLS/SSL 使用了不安全的加密演算法: ARCFOUR、CBC、HMAC-MD5、HMAC-RIPEMD160

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弱點: TLS Service Supports Weak Cipher Suite

Transport Layer Security (TLS), the successor to Secure Socket Layer (SSL), is a network protocol that encrypt communications between TLS servers (e.g., websites) and TLS clients (e.g., web browsers). Every communication is secured by a cipher suite: a combination of several algorithms working in concert. Cryptographic algorithms do not have a defined lifetime, but academics, researchers, and nation states are constantly evaluating them for weaknesses. Consensus on which algorithms are untrustworthy evolves over time, and if a communication is protected with a weak cipher suite then that communication can be altered or decrypted.

  • Severity: Medium
  • Risk: A TLS service was observed supporting weak cipher suites.
  • Recommendation: Disable the cipher suites listed in the evidence column of the measurement.

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如何解決 Web/Mail Server 使用了不安全的 SSL 通訊協定

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弱點: SSL/TLS Service Supports Weak Protocol

Transport Layer Security (TLS), the successor to Secure Socket Layer (SSL), is a network protocol that encrypt communications between TLS servers (e.g., websites) and TLS clients (e.g., web browsers). Every communication is secured by a cipher suite: a combination of several algorithms working in concert. Networking protocols do not have a defined lifetime, but academics, researchers, and nation states are constantly evaluating them for weaknesses. Consensus on which protocols are untrustworthy evolves over time, and if communications are sent with a weak protocol then that communication can be altered or decrypted.

  • Severity: High
  • Risk: A TLS service was observed supporting weak protocols.
  • Recommendation: Disable the protocols listed in the evidence column of the measurement.

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如何自動將網站的 http:// 網址轉址為 https://

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弱點: Site does not enforce HTTPS

The site responds to HTTP requests without ultimately redirecting the browser to a secure version of the page. Since the site allows plaintext traffic, a man-in-the-middle attacker is able to read and modify any information passed between the site and the user. There are a variety of situations in which an attacker can intercept plaintext traffic in a man-in-the-middle position, including but not limited to:

  1. Open Wi-Fi Hotspots
  2. WPA/WPA2 encrypted hot-spots where the attacker connected before the victim
  3. Malicious Wi-Fi access points
  4. Compromised switches and routers
  5. ARP poisoning on the same wired network

It's important to remember that in many of the above situations, an attacker can not only read traffic, but also actively modify the traffic. Even if a site that does not contain sensitive information, an attacker can still inject malicious content to a user’s browser.

  • Severity: High
  • Risk: Site does not enforce the use of HTTPS encryption, leaving the user vulnerable to man-in-the-middle attackers (who can falsify data and inject malicious code).
  • Recommendation: Any site served to a user (possibly at the end of a redirect chain) should be served over HTTPS.

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WordPress 的錯誤訊息: You don’t have permission to access post.php ...

如果你在上傳圖片時，出現:

 Http Error

或是發表文章時，出現

You don’t have permission to access /wordpress/wp-admin/post.php on this server.

這是 Apache 的 mod_security 造成之錯誤，這時候你可以在 wp-admin 的目錄下新增 .htaccess 檔案，內容如下:

<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>

這樣應該就可以輕鬆解決了。

參考網頁

  1. 窄多之Blog: PHP post error: Forbidden - You don't have permission to access
  2. Hongkiat: WordPress 2.5 Image Upload Error [Wordpress Fix]