We discuss the CVE-2022-2274 OpenSSL Vulnerability.
The OpenSSL 3.0.4 release introduced a serious bug in the RSA
implementation for X86_64 CPUs supporting the AVX512IFMA instructions.
This issue makes the RSA implementation with 2048 bit private keys
incorrect on such machines and memory corruption will happen during
the computation. As a consequence of the memory corruption an attacker
may be able to trigger a remote code execution on the machine performing
the computation.
0:00 Intro
1:00 CVE-2022-2274
3:00 AVX512IFMA CISC
5:00 How the bug works
7:10 How can it be triggered
Resources
https://www.openssl.org/news/secadv/20220705.txt
https://github.com/openssl/openssl/issues/18625
https://guidovranken.com/2022/06/27/notes-on-openssl-remote-memory-corruption/
https://eprint.iacr.org/2018/335
https://github.com/openssl/openssl/commit/4d8a88c134df634ba610ff8db1eb8478ac5fd345
https://linux.die.net/man/3/bn_internal
https://www.microfocus.com/documentation/enterprise-developer/ed60/ES-WIN/GUID-E3960B1E-C42E-4748-A5EB-6E12507C9CD7.html
https://www.microcontrollertips.com/risc-vs-cisc-architectures-one-better/
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