House of einherjar. * It has the additional requirement of a heap leak.

House of einherjar. envrion这个指针在libc储存,指向环境变量，被压入栈，可以泄漏stack地址 3. * The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc (). When the seal is broken up in the midwinter sky, All the dead will follow Odin and they're coming by the storm In the middle of the world the rock of Gods stand high. 27 KB hacktricks-fork / binary-exploitation / libc-heap / [house of einherjar] tinypad, Programmer Sought, the best programmer technical posts sharing site. 27上使用house of einherjar的条件是关键tcache选项 (等于没话)或者分配的chunk大于0x410使其不能放入tcachebin中。 附件 原始附件： libc. c 环境: Glibc 2. The einherjar (pronounced “ane-HAIR-yar,” with the first syllable like “sane” without the “s”; Old Norse einherjar, literally “those who fight alone”[1]) are the band of the spirits of deceased elite warriors who dwell in Valhalla, the magnificent hall of the god Odin. In Norse mythology, the einherjar (singular einheri; literally "army of one", "those who fight alone") [1][2] are those who have died in battle and are brought to Valhalla by valkyries. Find out more in Norse mythology guide. … Continue reading The 介紹 ¶ house of einherjar 是一種堆利用技術，由 Hiroki Matsukuma 提出。該堆利用技術可以強制使得 malloc 返回一個幾乎任意地址的 chunk 。其主要在於濫用 free 中的後向合併操作（合併低地址的chunk），從而使得儘可能避免碎片化。 $ . Mar 15, 2024 · baby-talk was a pwn challenge from Dice CTF 2024. Do not free the same memory more than once. * It has the additional requirement of a heap leak Use House of Einherjar to get an overlapping chunks situation and finish with Tcache poisoning ti get an arbitrary write primitive. It can be used to obtain overlapping chunks Which can further be used to launch other attacks (like tcache poisoning, demonstrated in PoC below) Use Trickest to easily build and automate workflows powered by the world's most advanced community tools. Use House of Einherjar to get an overlapping chunks situation and finish with Tcache poisoning ti get an arbitrary write primitive. 23—— 至今 可分配大于处于… Mar 8, 2022 · House Of Einherjarhouse of einherjar 跟 house of force 差不多，最终目的都是控制 top chunk 的值 该技术可以强制使得malloc返回一个几乎任意地址的 chunk House Of Einherjar 利用姿势伪造一个 chunk，计算最后一个 chunk 到我们伪造 chunk 的距离，设置为最后一个 chunk 的 pre_s What does the word house-of-einherjar mean? Find and lookup the definition, synonyms, and antonyms of the word house-of-einherjar in our free online dictionary! Dec 12, 2018 · 2018/12/12 本文参考ctf-wiki，简述house of einherjar的原理，并简单介绍SECCON2016 tinypad的利用思路，记录写exp时遇到的几个问题。 0x01 house of einherjar 原理 首先举例来说，在64位程序中，程序malloc了size大小后，glibc中chunk的SIZE通常是size+8 对齐 0x10byte。 Kyk na die subskripsie planne! Sluit aan by die 💬 Discord groep of die telegram groep of volg ons op Twitter 🐦 @hacktricks_live. Also, we can’t write anywhere other than the heap or stack. In Valhalla, the einherjar eat their fill of the nightly resurrecting beast Sæhrímnir, and valkyries bring them mead from the udder of the goat Heiðrún. Welcome to the page where you will find each trick/technique/whatever I have learnt in CTFs, real life apps, and reading researches and news. In the house of Odin the fallen one is standing With all Einherjar, ready for war. Mar 18, 2022 · House Of Einherjar这种堆块的利用方式与之前的有些区别，该技术可以强制使得 malloc 返回一个几乎任意地址的chunk。 和之前的利用技术有一些区别，之前我们都是尽可能的避免释放堆块与top_chunk合并，因为释放之后的堆块可能会进行复用，比如在挂hook的时候我们 Feb 28, 2020 · House of Einherjar 原理 House of Einherjar依靠Off-by-one将下一个chunk的 pre_inuse标志位置零， 将 p1 的 prev_size 字段设置为我们想要的目的 chunk 位置与 p1 的差值，在free下一个chunk时，让free函数以为上一个chunk已经被free，当free最后一个chunk时，会将伪造的chunk和当前chunk和top chunk进行unlink操作，合并成一个top chunk Jul 7, 2025 · How it works House of Einherjar is a go-to method for heap exploitation in case of a single NULL byte overflow vulnerability. Failing * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. 32. 31 大概先是用一个malloc后的空间构造了一个fake free chunk,然后在后面申请一个块。 后面申请的块在free时向前合并就把我们的fake free chunk合并了。 下次申请时返回的是我们构造的fake chunk。 在c释放前的堆差不多长这样： * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. 汉化加补充自己的理解. The purpose of this attack is to get malloc to return a chunk outside of the heap. The House of Einherjar was originally presented as a single null-byte overflow technique, but this is not its most realistic application. 2k次，点赞23次，收藏26次。本文详细介绍了glibc堆利用中的houseof系列手法，涉及溢出写、offbyone和offbynull技巧。作者通过例题讲解了一个具体漏洞，包括利用原理、程序保护、漏洞利用步骤和针对64位程序的技巧，展示了如何绕过unlink检查并最终获取shell。 Notifications You must be signed in to change notification settings Fork 0 24-4-6Seccon tinypad-house-of-EIherjar 24-4-7-Seccon tinypad-house-of-EIherjar 涉及知识 1. Nov 15, 2024 · House Of Einherjar 这种结束与之前的堆块利用有一些区别，该技术可以强制使得malloc返回几乎任意地址的chunk,可以说非常强大，他的原理跟chunk_overlapping 类似，在之前的堆利用中我们都要避免与top_chunk合并，而这个技术也可以与top_chunk合并进行利用，这里给的例子 Jan 5, 2024 · * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. c Cannot retrieve latest commit at this time. * It has the additional requirement of a heap leak * The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc(). c) 这段代码是向后合并的操作，p是刚刚被释放的堆块。如果它的prev_inuse位是0 的话 (正常情况是上一个相邻堆块被释放)，就会执行这段代码。先把前一个堆块的大小 (p->prev_size)赋给prevsize，把p的大小修改为两个堆块的大小之和。通过p的地址减去上一个堆块的 Use House of Einherjar to get an overlapping chunks situation and finish with Tcache poisoning ti get an arbitrary write primitive. Mar 13, 2022 · House Of Einherjar house of einherjar 跟 house of force 差不多，最终目的都是控制 top chunk 的值，该技术可以强制使得 malloc 返回一个几乎任意地址的 chunk Einherjar are those warriors called who have been chosen for their valor in battle to die in combat and join Odin's army in Valhalla. 介绍 house of einherjar 是一种堆利用技术，由 Hiroki Matsukuma 提出。 该堆利用技术可以强制使得 malloc 返回一个几乎任意地址的 chunk 。 其主要在于滥用 free 中的后向合并操作（合并低地址的chunk），从而使得尽可能避免碎片化。 Mar 8, 2022 · house of einherjar 小结 （2. We will accomplish this by consolidating the heap up to our fake chunk. Jun 28, 2022 · house_of_einherjar. However, in house of unsorted einherjar, at-tackers can achieve the same effect without this pre-condition. Jun 28, 2025 · [分享]House of Einherjar 文件路径 (malloc/malloc. Jan 5, 2024 · 堆利用学习：the house of einherjar简介部分，来自参考资料 [0]，最近在进行堆利用相关的学习，打算把公开的各种利用技术整理学习一遍 overflow write 、 off by one 、 off by null 目的是修改chunk的prev_inuse标志位 利用 off by null 修改掉 chunk 的 size 域的 P 位，绕过 unlink 检查，在堆的后向合并过程中构造出 chunk Dec 31, 2021 · 回顾0x01中，House Of Einherjar的利用要求，我们是否满足了要求？ House Of Einherjar的本例中需要满足的条件： 我们的target_addr是可控的，我们需要在上面构造fake_chunk并绕过unlink和unsorted bin的保护。 我们需要知道target_addr和chunk之间的地址偏移，用来写入prev_size位。 Feb 13, 2022 · Overview of current GLIBC heap exploitation techniques up to GLIBC 2. 23 / house_of_einherjar. Null-byte overflow bug in strtok. * It has the additional requirement of a heap leak 2. 欢迎各位喜欢安全的小伙伴们加入星盟安全 UVEgZ3JvdXA6IDU3MDI5NTQ2MQ== 本文包括poison null bytes和house of einherjar PS:由于本人才疏学浅,文中可能会有一些理解的不对的地方,欢迎各位斧正 🙂 Oct 9, 2023 · 我去除了大部分的英文 但保留了漏洞利用 这样才知道打的是house_of_einherjar (doge) 其实是方便调试 如下: The house of einherjar is a heap utilization technique proposed by Hiroki Matsukuma. GitHub Gist: instantly share code, notes, and snippets. Mar 18, 2022 · House Of Einherjar这种堆块的利用方式与之前的有些区别，该技术可以强制使得 malloc 返回一个几乎任意地址的chunk。 和之前的利用技术有一些区别，之前我们都是尽可能的避免释放堆块与top_chunk合并，因为释放之后的堆块可能会进行复用，比如在挂hook的时候我们 . Use Trickest to easily build and automate workflows powered by the world's most advanced community tools. Apr 2, 2018 · Unsorted bin attack Since we have a one-byte overflow House of Einherjar is obvious. - blupblob/SECWIKI * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. It is the responsibility of the developer to: free any memory he/she has obtained using malloc. how2heap / glibc_2. HOUse of eiherjar 2. $ . * It has the additional requirement of a heap leak Dec 11, 2016 · keywords: heap exploitation, glibc, Use After Free, malloc_consolidate, poisoned NUL byte, House of Einherjar Nov 25, 2022 · In Norse mythology, Einherjar are male warriors who died a noble death in battle. We will need to be able to write to the memory we want allocated prior to the allocation. Using the overlapping chunks that we got for leaking heap, we have the option of fastbin corruption. 2312345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838 Jan 3, 2021 · The House of Force The House of Spirit The House of Lore House of einherjar House of einherjar [English] House of einherjar [Korean] House of Orange Jan 3, 2021 · House of einherjar House of einherjar는 _int_free ()가 chunk를 top chunk에 등록하는 과정을 악용하는 기법입니다. Noble Viking warriors aspired to become one of the einherjar after they died. Χρησιμοποιήστε το House of Einherjar για να αποκτήσετε μια κατάσταση επικαλυπτόμενων chunks και να τελειώσετε με Tcache poisoning για να αποκτήσετε μια αυθαίρετη γραφή primitive. Feb 28, 2020 · 通过house_of_einherjar，我们可以控制top chunk，再次malloc后，我们可以控制程序相应位置，按照程序功能，可能会达到任意地址读写，然后就可以通过一般手段getshell。 Mar 10, 2025 · 看看执行： house of Einherjar 就简单讲一下泄露libc的方法吧，后面的攻击手法还是一样的，Arbitrary_alloc+realloc调整 Sep 22, 2022 · 本文详细介绍了堆利用技术中的House of Einherjar，这是一种通过伪造chunk来绕过系统检查的方法。 主要内容包括其工作原理、利用条件、unlink检查的绕过策略，以及一个包含off_by_one漏洞的示例程序。 Mar 3, 2025 · house of einherjar可以让malloc返回一个任意大小的chunk,但条件有点苛刻::disappointed_relieved: House Of Einherjar通过溢出修改chunk的prev_size和prev_inuse， 将prev_inuse改为0，让正常chunk被标记位被释放， prev_size改为目标地址和正常chunk之间的距离,让正常chunk释放时去找fake chunk. _int_free ()은 전달받은 포인터가 fastbin에 포함되는 chunk인지 확인합니다. * It has the additional requirement of a heap leak Mar 28, 2019 · With this trick, the address of item array fixed on each run. i64 House Of Einherjar 介绍 house of einherjar 是一种堆利用技术，该堆利用技术可以强制使得 malloc 返回一个几乎任意地址的 chunk 。 * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. Unaligned double free (UFF). 31. house of einherjar. Challenge files can be found here. /house_einherjar_exp So let's cover a House of Einjar attack. If anyone knows, please write in the comments. 23没有本质上的不同，可以说基本上是一样的思路。 需要在 2. 27的house of einherjar和2. It assumes an overflow that can clear a victim chunk’s prev_inuse bit whilst having control of the victim chunk’s prev_size field. * It has the additional requirement of a heap leak. Mar 18, 2022 · House Of Einherjar这种堆块的利用方式与之前的有些区别，该技术可以强制使得 malloc 返回一个几乎任意地址的chunk。 和之前的利用技术有一些区别，之前我们都是尽可能的避免释放堆块与top_chunk合并，因为释放之后的堆块可能会进行复用，比如在挂hook的时候我们 house of einherjar 是一种堆利用技术，由 Hiroki Matsukuma 提出。 该堆利用技术可以强制使得 malloc 返回一个几乎任意地址的 chunk 。 Sep 8, 2021 · 主要内容：解释House Of Einherjar的攻击原理，并对CTF Wiki中PWN的House Of Einherjar部分的例题使用House Of Einherjar方法的解法做详细说明 Jan 15, 2025 · The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc () This technique may result in a more powerful primitive than the Poison Null Byte, but it has the additional requirement of a heap leak. 攻击手法 h 发布于 2024-04-07 Jul 11, 2022 · house of einherjar本篇同样是跟着how2heap来学习。 2. Використовуйте House of Einherjar, щоб отримати ситуацію з перекриваючими чанками і закінчити з отруєнням Tcache, щоб отримати примітив довільного запису. Use House of Einherjar to get an overlapping chunks situation and finish with Tcache poisoning ti get an arbitrary write primitive. The glibc library provides functions such as free and malloc to help developers manage the heap memory according to their use cases. We named this technique house of unsorted einherjar, as it interestingly combines two techniques, house of einherjar and unsorted bin into stack, to relax the requirement of the well-known exploitation technique. So this technique is ruled out here. so. house of einherjar 是一种堆利用技术，由 Hiroki Matsukuma 提出。 该堆利用技术可以强制使得 malloc 返回一个几乎任意地址的 chunk 。 Sep 8, 2021 · 主要内容：解释House Of Einherjar的攻击原理，并对CTF Wiki中PWN的House Of Einherjar部分的例题使用House Of Einherjar方法的解法做详细说明 Jan 15, 2025 · The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc () This technique may result in a more powerful primitive than the Poison Null Byte, but it has the additional requirement of a heap leak. * It has the additional requirement of a heap leak History History 75 lines (54 loc) · 5. We named this technique, house of unsorted einherjar, as it interestingly combines two techniques, house of einherjar and unsorted bin into stack, to relax the requirement of the well-known exploitation technique. Nov 15, 2024 · House_of_Einherjar(2016 Seccon tinypad)House Of Einherjar这种结束与之前的堆块利用有一些区别，该技术可以强制使得malloc返回几乎任意地址的chunk,可以说非常强大，他的原理跟chunk_overlapping 类似，在之前的堆利用中我们都要避免与top_chunk合并，而这个技术也可以与top_chunk合并进行利用，这里给的例子只是任 $ . * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. House of Force, House of Mind, House of Rabbit, House of Einherjar, House of Spirit, House of Lore Too many houses! Anyway, that's just a question that popped into my head. The heap exploit technique forces the mallocto return a chunk of almost any address. But because of PIE, House of Einherjar is impossible. Verwende House of Einherjar, um eine Überlappung von Chunks zu erreichen und mit Tcache-Poisoning zu enden, um eine willkürliche Schreibprimitive zu erhalten. 그리고 해당 chunk가 fastbin이 아닌 경우 해당 chunk가 mmap ()으로 얻은 chunk인지 확인합니다. There are two known techniques about off-by-one null byte, we can find them on how2heap, the first one is house-of-einherjar, which results in getting a controlled pointer; the second is poison null byte, which leads to overlapping chunks. 23-64位） house of Einherjar 的核心在于 top chunk 合并，如果一个程序有 off-by-null，并且某片区域可以控制，那么就可以通过 house of einherjar 把 top chunk 合并到那里去 * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. blog 关于我们 网站提交 今日热榜 首页 • 逆向病毒分析 •House of Einherjar * This modification to The House of Enherjar, made by Huascar Tejeda - @htejeda, works with the tcache-option enabled on glibc-2. Ensure that memory usage does not go beyond the amount of memory requested, in other terms, prevent heap overflows. * The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc(). Deel hacking truuks deur PRs in te dien na dieHackTricks en HackTricks Cloud github repos. 6 tinypad 标注后的附件： tinypad. Unaligned double free (UDF). Jan 6, 2024 · 和the house of spirit有点像，hos修改size制作fake chunk，释放再申请得到堆块重叠 house of einherjar利用空字节溢出覆盖prev_used为0，基于堆块合并合并到fake chunk，得到堆块重叠 相关技巧 虽然该利用技巧至今仍可以利用，但是需要对 unlink 绕过的条件随着版本的增加有所 Apr 10, 2023 · 利用 house of einherjar 方法在 tinypad 的前0x100字节中伪造 chunk。 当我们再次申请时，那么就可以控制4个 memo 的指针和内容了。 house of einherjar 是一种堆利用技术，由 Hiroki Matsukuma 提出。 该堆利用技术可以强制使得 malloc 返回一个几乎任意地址的 chunk 。 Sep 8, 2021 · 主要内容：解释House Of Einherjar的攻击原理，并对CTF Wiki中PWN的House Of Einherjar部分的例题使用House Of Einherjar方法的解法做详细说明 Jan 15, 2025 · The House of Einherjar uses an off-by-one overflow with a null byte to control the pointers returned by malloc () This technique may result in a more powerful primitive than the Poison Null Byte, but it has the additional requirement of a heap leak. The challenge involves exploiting the heap with the House of Einherjar attack. Contribute to yichen115/how2heap_zh development by creating an account on GitHub. The victim’s prev_size field is populated such that when the victim chunk is freed it consolidates backwards with a fake However, in house of unsorted einherjar, attackers can achieve the same effect without this pre-condition. Feb 6, 2023 · malloc一个unsorted bin范围的chunk（b），用于触发向下合并 a [real_a_size] = 0利用of by null修改b的preinuse位，在free (b)的时候触发向下合并 计算从b到fake chunk的偏移，减去的0x10是b的size和presize 修改b的presize为fake_size 修改fake chunk的size为fake_size（不改也行，这个版本没检查） free (b)触发向下合并 再申请chunk的 Jan 1, 2024 · 文章浏览阅读1. 34, including their ideas and introduced mitigations along the way Search the web like a real hacker would, Venacus provides the critical breach intelligence needed for effective penetration testing Nov 22, 2022 · 文章浏览阅读985次。本文详细介绍了House of Einherjar堆利用技术，通过滥用free中的后向合并操作实现几乎任意地址的chunk分配。文章深入分析了一道典型CTF题目，展示了如何利用此技术进行漏洞攻击。 Mar 18, 2022 · 好好说话之Use After Free 好好说话之unlink … 编写不易，如果能够帮助到你，希望能够点赞收藏加关注哦Thanks♪ (･ω･)ﾉ House Of Einherjar House Of Einherjar这种堆块的利用方式与之前的有些区别，该技术可以强制使得 malloc 返回一个几乎任意地址的chunk。 Mar 12, 2024 · 最近在进行堆利用相关的学习，打算把公开的各种利用技术整理学习一遍。 一 漏洞成因 overflow write、off by one、off by null目的是修改chunk的prev_inuse标志位。 二 适用范围 2. adtf dnix dsz wiojng yhhrr fsidw kad rouh jmswne yummyb
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