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Vulnerability analyze
最近在研究QEMU CVE-2020-14364 漏洞,之前从来没做过相关的研究。现在原理基本理解了,但是一些细节还是不是很懂。网上能找到代码的文章主要有三篇:
QEMU CVE-2020-14364 漏洞分析(含POC演示)
CVE-2020-14364 QEMU逃逸 漏洞分析 (含完整EXP)
CVE-2020-14364-Qemu逃逸漏洞分析及两种利用思路
看起来想法都差不多,但是对于我这种初学者来说,还有不少细节不是很理解,特别是这个基地址是怎么计算的。三篇文章计算出来的数值都不一样,我直接用这些代码都是不成功的,看起来应该就是基地址和system@plt不对。现在我可以用objdump对qemu-system-x86_64反汇编获得system@plt偏移,或者通过readelf读取libc.so.6获得system偏移,但是基地址怎么算文章都没有具体提到,也就是这一行。
本来我应该自己恶补基础知识的,但是现在我时间比较紧急,希望你能够指导一下,回头再继续恶补。谢谢!
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