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.
総合評価: CVE-2021-32791 は中リスク（49.4/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 1.50%、71 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.51% | 1.50% | +0.99% |
| 2 | 2026-05-28 | 0.36% | 0.51% | +0.15% |
| 3 | 2026-05-02 | — | 0.36% | — |
EPSS の全履歴 （全 34 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2021-32791 not yet assigned priority: Debian including 1 source packages (libapache2-mod-auth-openidc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-32791 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-32791 |
suse
|
medium | CVE-2021-32791 severity moderate: SUSE including 7 source package names (apache2-mod_auth_openidc-2.3.8-3.15.1, apache2-mod_auth_openidc-2.3.8-lp152.5.6.1, …), 14 product×package rows across 12 product lines (SUSE Liberty Linux 8, SUSE Linux Enterprise Module for Server Applications 15 SP2, … (12 product lines)): Fixed 14. | https://www.suse.com/security/cve/CVE-2021-32791/ |
ubuntu
|
low | CVE-2021-32791 low priority: Ubuntu including 1 source packages (libapache2-mod-auth-openidc), 15 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, needed 2, DNE 1, ignored 1, released 1. | https://ubuntu.com/security/CVE-2021-32791 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openidc | mod_auth_openidc | < 2.4.9 | cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |