CVE-2021-32791

NameCVE-2021-32791
Descriptionmod_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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3409-1
Debian Bugs991581

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libapache2-mod-auth-openidc (PTS)buster2.3.10.2-1+deb10u1vulnerable
buster (security)2.3.10.2-1+deb10u3fixed
bullseye (security), bullseye2.4.9.4-0+deb11u3fixed
bookworm2.4.12.3-2fixed
sid, trixie2.4.15.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libapache2-mod-auth-openidcsourcebuster2.3.10.2-1+deb10u2DLA-3409-1
libapache2-mod-auth-openidcsource(unstable)2.4.9-1991581

Notes

[stretch] - libapache2-mod-auth-openidc <no-dsa> (Minor issue)
https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-px3c-6x7j-3r9r
https://github.com/zmartzone/mod_auth_openidc/commit/375407c16c61a70b56fdbe13b0d2c8f11398e92c (v2.4.9)

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