https://eprint.iacr.org/2023/331.pdf

"A Vulnerability in Implementations of SHA-3"

> we show how this vulnerability can be used to construct second preimages and preimages for the mplementation, and we provide a pecially constructed file that, when ashed, allows the attacker to execute arbitrary code on the victim’s device

💥

#Security #hash #sha3 #crypto

Paper 2023/331 A Vulnerability in Implementations of SHA-3, SHAKE, EdDSA, and Other NIST-Approved Algorithm

Abstract

This paper describes a vulnerability in several implementations of the Secure Hash Algorithm 3 (SHA-3) that have been released by its designers. The vulnerability has been present since the final-round update of Keccak was submitted to the National Institute of Standards and Technology (NIST) SHA-3 hash function competition in January 2011, and is present in the eXtended Keccak Code Package (XKCP) of the Keccak team. It affects all software projects that have integrated this code, such as the scripting languages Python and PHP Hypertext Preprocessor (PHP). The vulnerability is a buffer overflow that allows attacker-controlled values to be eXclusive-ORed (XORed) into memory (without any restrictions on values to be XORed and even far beyond the location of the original buffer), thereby making many standard protection measures against buffer overflows (e.g., canary values) completely ineffective. First, we provide Python and PHP scripts that cause segmentation faults when vulnerable versions of the interpreters are used. Then, we show how this vulnerability can be used to construct second preimages and preimages for the implementation, and we provide a specially constructed file that, when hashed, allows the attacker to execute arbitrary code on the victim's device. The vulnerability applies to all hash value sizes, and all 64-bit Windows, Linux, and macOS operating systems, and may also impact cryptographic algorithms that require SHA-3 or its variants, such as the Edwards-curve Digital Signature Algorithm (EdDSA) when the Edwards448 curve is used. We introduce the Init-Update-Final Test (IUFT) to detect this vulnerability in implementations. #cryptography #encryption #sha #sha3 #cybersecurity #hash #hashing #algorithm #algorithms #nist #nistcybersecurityframework

https://eprint.iacr.org/2023/331

The only good part is that SHA3 is still not that widespread.
https://eprint.iacr.org/2023/331
#sha3 #CVE_2022_37454

Sichere Ahnen Prüfung mit Cryptographic Hashes

Bei der Erstellung eigner Stammbäume gibt es immer wieder den Wunsch in anderen Datenbeständen nach Familienangehörigen zu suchen. Dabei ergibt sich jedoch das Problem, dann personenbezogene Daten an andere versendet werden müssen.

https://schegge.de/2023/03/sichere-ahnen-pruefung-mit-cryptographic-hashes/

#Algorithmen #BestPractices #Design-Pattern #Java #Web #SHA #SHA3-256

Sichere Ahnen Prüfung mit Cryptographic Hashes

Bei der Erstellung eigner Stammbäume gibt es immer wieder den Wunsch in anderen Datenbeständen nach Familienangehörigen zu suchen. Dabei ergibt sich jedoch das Problem, dann personenbezogene Daten an andere versendet werden müssen.

https://schegge.de/2023/03/sichere-ahnen-pruefung-mit-cryptographic-hashes/

#Algorithmen #BestPractices #Design-Pattern #Java #Web #SHA #SHA3-256

With full joy I will be talking in #LibrePlanet 2023 about a free system for cataloguing challenging museum-libraries items like manuscripts and books with dedication/marginalia.

https://libreplanet.org/2023/program/

@fsf #FreeSoftwareFoundation #MESICON #Linux #Apache #MySQL #PHP #SHA3

With full joy I will be talking in #LibrePlanet 2023 about a free system for cataloguing challenging museum-libraries items like manuscripts and books with dedication/marginalia.

https://libreplanet.org/2023/program/

@fsf #FreeSoftwareFoundation #MESICON #Linux #Apache #MySQL #PHP #SHA3

⚠️ CVE-2022-37454 - Buffer overflow in the #sha3 module in #Python 3.10 and older 🐍 https://python-security.readthedocs.io/vuln/sha3-buffer-overflow.html #security

SHA-3 buffer overflow

#cryptography #sha3 #cryptanalysis

https://mouha.be/sha-3-buffer-overflow/