Transport Layer Security (TLS) P

1. 漏洞报告

2. 漏洞介绍

           CRIME(CVE-2012-4929)，全称Compression Ratio Info-leak Made Easy，这是一种因SSL压缩造成的安全隐患，通过它可窃取启用数据压缩特性的HTTPS或SPDY协议传输的私密Web Cookie。在成功读取身份验证Cookie后，攻击者可以实行会话劫持和发动进一步攻击。

3. 漏洞危害

可以窃取Web Cookie进行下一步攻击。

4. 漏洞检测

TLS Compression可以看到Compression enabled是开启的，存在CRIME漏洞。

root@kali:~# sslscan 192.168.56.129:9443
Version: 1.11.13-static
OpenSSL 1.0.2-chacha (1.0.2g-dev)

Connected to 192.168.56.129

Testing SSL server 192.168.56.129 on port 9443 using SNI name 192.168.56.129

  TLS Fallback SCSV:
Server only supports TLSv1.0

  TLS renegotiation:
Secure session renegotiation supported

  TLS Compression:
Compression enabled (CRIME)

  Heartbleed:
TLS 1.2 not vulnerable to heartbleed
TLS 1.1 not vulnerable to heartbleed
TLS 1.0 not vulnerable to heartbleed

  Supported Server Cipher(s):
Preferred TLSv1.0  256 bits  AES256-SHA                   
Accepted  TLSv1.0  128 bits  AES128-SHA                   
Accepted  TLSv1.0  128 bits  RC4-SHA                      
Accepted  TLSv1.0  128 bits  RC4-MD5                      
Accepted  TLSv1.0  112 bits  DES-CBC3-SHA                 
Accepted  TLSv1.0  56 bits   DES-CBC-SHA                  
Preferred SSLv3    256 bits  AES256-SHA                   
Accepted  SSLv3    128 bits  AES128-SHA                   
Accepted  SSLv3    128 bits  RC4-SHA                      
Accepted  SSLv3    128 bits  RC4-MD5                      
Accepted  SSLv3    112 bits  DES-CBC3-SHA                 
Accepted  SSLv3    56 bits   DES-CBC-SHA                  
Preferred SSLv2    128 bits  RC2-CBC-MD5                  
Accepted  SSLv2    128 bits  RC4-MD5                      
Accepted  SSLv2    112 bits  DES-CBC3-MD5                 
Accepted  SSLv2    56 bits   DES-CBC-MD5                  
Accepted  SSLv2    40 bits   EXP-RC2-CBC-MD5              
Accepted  SSLv2    40 bits   EXP-RC4-MD5                  

  SSL Certificate:
Signature Algorithm: sha1WithRSAEncryption
RSA Key Strength:    1024

Subject:  bee-box.bwapp.local
Issuer:   bee-box.bwapp.local

Not valid before: Apr 14 18:11:32 2013 GMT
Not valid after:  Apr 13 18:11:32 2018 GMT

5. 漏洞修复

1. 禁用compression 功能。（lighttpd服务器）首先禁用

2. 禁用 SPDY 服务。可以通过谷歌插件HTTP/2 and SPDY indicator可以查看网站是否SPDY服务。