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90 lines
5 KiB
Markdown
90 lines
5 KiB
Markdown
# Hash Length Extension Attack
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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#### [WhiteIntel](https://whiteintel.io)
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<figure><img src="../.gitbook/assets/image (1227).png" alt=""><figcaption></figcaption></figure>
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[**WhiteIntel**](https://whiteintel.io) ni injini ya utafutaji inayotumiwa na **dark-web** ambayo inatoa kazi za **bure** kuangalia kama kampuni au wateja wake wamekuwa **compromised** na **stealer malwares**.
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Lengo lao kuu la WhiteIntel ni kupambana na utekaji wa akaunti na mashambulizi ya ransomware yanayotokana na malware inayopora taarifa.
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Unaweza kuangalia tovuti yao na kujaribu injini yao kwa **bure** kwenye:
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{% embed url="https://whiteintel.io" %}
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***
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## Summary of the attack
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Fikiria seva ambayo inasaini baadhi ya **data** kwa kuongezea **siri** kwa baadhi ya data ya wazi inayojulikana na kisha kuhashi data hiyo. Ikiwa unajua:
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* **Urefu wa siri** (hii inaweza pia kubruteforced kutoka kwa anuwai ya urefu iliyotolewa)
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* **Data ya wazi**
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* **Algorithimu (na inahatarishwa na shambulio hili)**
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* **Padding inajulikana**
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* Kawaida moja ya chaguo-msingi inatumika, hivyo ikiwa mahitaji mengine 3 yanakidhi, hii pia inafanya hivyo
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* Padding inatofautiana kulingana na urefu wa siri + data, ndivyo maana urefu wa siri unahitajika
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Basi, inawezekana kwa **mshambuliaji** ku **ongeza** **data** na **kuunda** **sahihi** halali kwa **data ya awali + data iliyoongezwa**.
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### How?
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Kimsingi algorithimu zinazohatarishwa zinaweza kuunda hash kwa kwanza **kuhashi block ya data**, na kisha, **kutoka** kwa **hash** iliyoundwa **awali** (hali), wana **ongeza block inayofuata ya data** na **kuhashi**.
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Basi, fikiria kwamba siri ni "siri" na data ni "data", MD5 ya "siri data" ni 6036708eba0d11f6ef52ad44e8b74d5b.\
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Ikiwa mshambuliaji anataka kuongeza mfuatano "ongeza" anaweza:
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* Kuunda MD5 ya "A" 64
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* Kubadilisha hali ya hash iliyowekwa awali kuwa 6036708eba0d11f6ef52ad44e8b74d5b
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* Ongeza mfuatano "ongeza"
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* Maliza hash na hash inayotokana itakuwa **halali kwa "siri" + "data" + "padding" + "ongeza"**
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### **Tool**
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{% embed url="https://github.com/iagox86/hash_extender" %}
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### References
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Unaweza kupata shambulio hili limeelezewa vizuri katika [https://blog.skullsecurity.org/2012/everything-you-need-to-know-about-hash-length-extension-attacks](https://blog.skullsecurity.org/2012/everything-you-need-to-know-about-hash-length-extension-attacks)
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#### [WhiteIntel](https://whiteintel.io)
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<figure><img src="../.gitbook/assets/image (1227).png" alt=""><figcaption></figcaption></figure>
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|
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[**WhiteIntel**](https://whiteintel.io) ni injini ya utafutaji inayotumiwa na **dark-web** ambayo inatoa kazi za **bure** kuangalia kama kampuni au wateja wake wamekuwa **compromised** na **stealer malwares**.
|
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Lengo lao kuu la WhiteIntel ni kupambana na utekaji wa akaunti na mashambulizi ya ransomware yanayotokana na malware inayopora taarifa.
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Unaweza kuangalia tovuti yao na kujaribu injini yao kwa **bure** kwenye:
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{% embed url="https://whiteintel.io" %}
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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|
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<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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