intel-amt-vulnerability-- memcmp and strncmp function calls can be skipped due to incorrect buffer l
来源:互联网 发布:qq游戏网络 编辑:程序博客网 时间:2024/06/16 17:58
原文如下:
https://www.embedi.com/news/what-you-need-know-about-intel-amt-vulnerability
攻击原理如下:
As the paper describes, the code checks user response as:
if(strncmp(computed_response,user_response, response_length))
exit(0x99);
the value of response_length depends on length ofuser_response. When no response from user, response_length will be 0, and the strncmp will also return 0 and pass the check.
所以 strncmp、 strncpy 的函数调用的时候,需要注意这个问题,多做check.
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