Read and write beyond bounds in mod_sed
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原文摘录
摘自原文（21219 字符中的一小部分）
This CVE consists of several bugs in mod_sed, where overflows, truncation, uses after free and a logic error can allow a remote, unauthenticated attacker to read and/or write heap locations beyond bounds. See https://github.com/apache/httpd/commit/943f57b336f264d77e5b780c82ab73daf3d14deb and …
原文中的代码
Greetings. I have discovered a use-after-free bug in sed1.c that causes a read and/or write beyond bounds. The bug is that dosub() (modules/filters/sed1.c) does not update |step_vars->loc1| or |step_vars->loc2| after appending to -- and thus possibly causing an expansion and reallocation of -- …
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