由于org_ptr是后面malloc的,所以org_ptr和top chunk相邻,于是我们就可以溢出top chunk,org_ptr的值会在top chunk的pre_size为, 而top chunk的size位则为host_的开始 4 个字节。所以我们现在可以任意修改top chunk的size位。 然后在new_note里面,我们可以控制分配的大小,而且我们可以 分配最多10个note 所以我们现...
通过一个堆溢出覆盖top chunk的size字段后,在利用 unsorted chunk attack攻击 _IO_FILE对象,最终实现代码执行,这整个过程确实精妙.也可以看出作者对linux的堆管理机制应该是十分的了解.所以我们在研究一些东西时一定要研究透彻,只有这样才能想到别人想不到的思路. ...
课时4:Top chunk attack 33分钟 课时5:hijack stdout 23分钟 课时6:了解沙箱(seccomp) 36分钟 课时7:kernel 基础 34分钟 课时8:UAF 36分钟 课时9:hijack SEH 40分钟 课时10:unlink 29分钟 课时11:arm pwn 33分钟 课时12:SROP 47分钟 课时13:House of pig利用技巧 83分钟 课时14:Musl 1.2...
首先是libc会检查用户申请的大小,top chunk是否能给的起,如果给得起,就由top chunk的head处,以用户申请大小所匹配的chunk大小为偏移量,将top chunk的位置推到新的位置,而原来的top chunk head处就作为新的堆块被分配给用户了:试想,如果我们能控制top chunk在这个过程中推到任意位置,也就是说,如果我们能控制用...
The Guardian Top News｜乌克兰从库尔斯克撤退，标志着乌克兰对俄罗斯的七个月入侵结束 U nder constant attack from drones attached to fibre optic cables, the soldiers scrambled in groups of two or three along hidden tracks or through fields, often walking miles on foot to get back into Ukrainian ...
The Black Russian is the size of an 80s metal lunchbox and took up an awkward sized chunk of the pedalboard. Now there’s more room for other unnecessary boxes (gulp)! One noteworthy ding for this pedal is how difficult it is to see the script on the top of the pedal. The words ...
6. Hundun's chaos attack allows him to basically do anything he pleases. He can teleport, transform spirits into dark spirits at will, cast large and complicated illusions, steal qi, and do a bunch of other sh*t as well. He can also earthbend a massive chunk of earth in the spirit wor...
Many provide a good chunk of storage space for a reasonable price, wide enough platform support, and decent file sharing capabilities. Perhaps, the biggest differentiator among cloud storage services is their integrations with existing ecosystems. On my list, these are Google Drive and Microsoft ...
moving the Rams into scoring range three times in the second half. They fell short of the end zone on each trip -- including on a possession in which Stafford tried to run for a touchdown and was slammed into the turf, leaving a chunk of grass in his helmet -- but that was still ...
Phil Savage: Technically it's meant to be a bleak, hostile world—a major chunk of it is just a muddy warzone. But of every open world game, it's the one I enjoy exploring the most. It's packed with detail, full of secrets, and, in Gwent, contains one of the best minigames eve...