write up： web 前女友(SKCTF)

朱雀 2023-06-18 15:50 177阅读 0赞

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直接访问：

http://123.206.31.85:49162/code.txt

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo_size_16_color_FFFFFF_t_70 2]  
一个简单的**md5比较漏洞**和**strcmp比较漏洞**。

### 常用的几个字符串及对应的md5: ###

QNKCDZO
    0e830400451993494058024219903391
    240610708
    0e46209743190650901 9562988736854
    aabg7XSs
    0e0873864821 36013740957780965295
    aabC9RqS
    0e041 0225181 657 28065344349536299
    s878926199a
    0e545993274517709034328855841020

### strcmp比较漏洞 ###

5.3.3以后,当比较 \*\*数组和字符串 \*\*的时候，返回是0。

构造一个url：

http://123.206.31.85:49162/?v1=QNKCDZO&v2=aabg7XSs&v3[]=1

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo_size_16_color_FFFFFF_t_70 3]  
end～

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2019120311050449.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191203110541244.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RiX3lvdXRo,size_16,color_FFFFFF,t_70
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