CVE-2021-32791 — Hardcoded static IV and AAD with a reused key in AES GCM encryption in mod_auth_openidc
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an Open…
Published: 2021-07-26 · CVSS: 5.9 · CVSS 3.1
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, the AES GCM encryption in mod_auth_openidc uses a static IV and AAD. It is important to fix because this creates a static nonce and since aes-gcm is a stream cipher, this can lead to known cryptographic issues, since the same key is being reused. From 2.4.9 onwards this has been patched to use dynamic values through usage of cjose AES encryption routines.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7