Use of Insufficiently Random Values Affecting libapache2-mod-auth-openidc package, versions <2.4.9-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.21% (60th percentile)

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  • Snyk IDSNYK-DEBIAN12-LIBAPACHE2MODAUTHOPENIDC-1549663
  • published27 Jul 2021
  • disclosed26 Jul 2021

Introduced: 26 Jul 2021

CVE-2021-32791  (opens in a new tab)
CWE-330  (opens in a new tab)

How to fix?

Upgrade Debian:12 libapache2-mod-auth-openidc to version 2.4.9-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libapache2-mod-auth-openidc package and not the libapache2-mod-auth-openidc package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.

CVSS Scores

version 3.1