9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
In OpenSSL version 3.0.4 a heap buffer overflow exists in the AVX512 support that can be attacked via network resulting in code execution. This is reachable via four code paths: RSAZ 1024, RSAZ 512, Dual 1024 RSAZ, and Default constant-time Montgomery modular exponentiation. Please note this issue is especially serious as OpenSSL 3.0.4 contains a security fix for CVE-2022-2068 which allows arbitrary code execution. This means that all users of OpenSSL 3 are affected by a number of serious security vulnerabilities. Intel AXV-512 support is present in Intel CPUs releases including Knights Landing (Xeon Phi x200, 2016), Knights Mill (Xeon Phi x205, 2017), Skylake-SP, Skylake-X (2017), Cannon Lake (2018), Cascade Lake (2019), Cooper Lake (2020), Ice Lake (2019), Tiger Lake (2020), Rocket Lake (2021). Please note that on Alder Lake (2021) AVX-512 is not officially supported, but can be enabled on some motherboards with some BIOS versions. For AMD all Zen4 CPUs contain AVX-512 support.
en.wikipedia.org/wiki/AVX-512
github.com/openssl/openssl/commit/10d8a109be0fe50315e4eeb0676f6571914cd47a
github.com/openssl/openssl/issues/18625
guidovranken.com/2022/06/27/notes-on-openssl-remote-memory-corruption/
twitter.com/GuidoVranken/status/1539687342939820032
www.theregister.com/2022/06/27/openssl_304_memory_corruption_bug/
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C