The remote SUSE Linux SUSE15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1277-1 advisory.

  - 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. When     mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache     (`OIDCCacheEncrypt off`, `OIDCSessionType server-cache`, `OIDCCacheType redis`), `mod_auth_openidc`     wrongly performed argument interpolation before passing Redis requests to `hiredis`, which would perform     it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not     appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by     repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing     argument interpolation only once, using the `hiredis` API. As a workaround, this vulnerability can be     mitigated by setting `OIDCCacheEncrypt` to `on`, as cache keys are cryptographically hashed before use     when this option is enabled. (CVE-2021-32785)

  - 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 versions     prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a     result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout     functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect     with slashes to address a particular breaking change between the different specifications (RFC2396 /     RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring     `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.
    (CVE-2021-32786)

  - 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. (CVE-2021-32791)

  - 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, there is an XSS vulnerability in when using `OIDCPreservePost On`.
    (CVE-2021-32792)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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 versions     prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a     result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout     functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect     with slashes to address a particular breaking change between the different specifications (RFC2396 /     RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring     `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.
    (CVE-2021-32786)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3352-1 advisory.

    - CVE-2021-32785: format string bug via hiredis (bsc#1188638)
    - CVE-2021-32786: open redirect in logout functionality (bsc#1188639)
    - CVE-2021-32791: Hardcoded static IV and AAD with a reused key in AES GCM encryption (bsc#1188849)
    - CVE-2021-32792: XSS when using OIDCPreservePost On (bsc#1188848)
    - CVE-2021-39191: open redirect issue in target_link_uri parameter (bsc#1190223)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0135 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2021-32786:
    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 versions     prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a     result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout     functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect     with slashes to address a particular breaking change between the different specifications (RFC2396 /     RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring     `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.

    CVE-2021-32791:
    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.

    CVE-2021-32792:
    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, there is an XSS vulnerability in when using `OIDCPreservePost On`.

    CVE-2021-39191:
    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 versions     prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable     to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in     version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the     `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-02c84fe305 advisory.

    Automatic update for mod_auth_openidc-2.4.12.3-2.fc39.

    ##### **Changelog**

    ```
    * Tue Mar  7 2023 Tomas Halman <thalman@redhat.com> - 2.4.12.3-2     migrated to SPDX license
    * Tue Feb 28 2023 Tomas Halman <thalman@redhat.com> - 2.4.12.3-1     Rebase to 2.4.12.3 version
    - Resolves: rhbz#2164064 - mod_auth_openidc-2.4.12.3 is available
    * Thu Jan 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.12.2-2
    - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild
    * Fri Dec 16 2022 Tomas Halman <thalman@redhat.com> - 2.4.12.2-1     Rebase to 2.4.12.2 version
    - Resolves: rhbz#2153658 - CVE-2022-23527 mod_auth_openidc: Open Redirect in       oidc_validate_redirect_url() using tab character
    * Thu Sep 22 2022 Tomas Halman <thalman@redhat.com> - 2.4.11.2-3
    - Resolves: rhbz#2128328 - Port pcre dependency to pcre2
    * Thu Jul 21 2022 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.11.2-2
    - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild
    * Thu Jun 23 2022 Tomas Halman <thalman@redhat.com> - 2.4.11.2-1
    - Resolves: rhbz#2082376 - New version 2.4.11.2 available
    * Mon Apr 11 2022 Tomas Halman <thalman@redhat.com> - 2.4.11.1-1
    - Resolves: rhbz#1996926 - New version 2.4.11.1 available
    * Thu Mar 31 2022 Tomas Halman <thalman@redhat.com> - 2.4.9.4-1
    - Resolves: rhbz#2001647 - CVE-2021-39191 mod_auth_openidc: open redirect                                by supplying a crafted URL in the target_link_uri                                parameter
    * Thu Jan 20 2022 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.9.1-3
    - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild
    * Tue Sep 14 2021 Sahana Prasad <sahana@redhat.com> - 2.4.9.1-2
    - Rebuilt with OpenSSL 3.0.0
    * Wed Aug 18 2021 Jakub Hrozek <jhrozek@redhat.com> - 2.4.9.1-1
    - New upstream release
    - Resolves: rhbz#1993566 - mod_auth_openidc-2.4.9.1 is available
    * Fri Jul 30 2021 Jakub Hrozek <jhrozek@redhat.com> - 2.4.9-1
    - Resolves: rhbz#1985153 - mod_auth_openidc-2.4.9 is available
    - Resolves: rhbz#1986103 - CVE-2021-32786 mod_auth_openidc: open redirect                                in oidc_validate_redirect_url()
    - Resolves: rhbz#1986396 - CVE-2021-32791 mod_auth_openidc: hardcoded                                static IV and AAD with a reused key in AES GCM                                encryption
    - Resolves: rhbz#1986398 - CVE-2021-32792 mod_auth_openidc: XSS when using                                OIDCPreservePost On
    * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.8.4-2
    - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
    * Wed Jun  2 2021 Jakub Hrozek <jhrozek@redhat.com> - 2.4.8.3-1
    - New upstream release
    - Resolves: rhbz#1966756 - mod_auth_openidc-2.4.8.3 is available
    * Mon May 10 2021 Jakub Hrozek <jhrozek@redhat.com> - 2.4.8.2-1
    - New upstream release
    - Resolves: rhbz#1958466 - mod_auth_openidc-2.4.8.2 is available
    * Thu May  6 2021 Jakub Hrozek <jhrozek@redhat.com> - 2.4.7.2-1
    - New upstream release
    - Resolves: rhbz#1900913 - mod_auth_openidc-2.4.7.2 is available
    * Fri Apr 30 2021 Tomas Halman <thalman@redhat.com> - 2.4.4.1-3
    - Remove unnecessary LTO patch

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:3020-1 advisory.

  - 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. When     mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache     (`OIDCCacheEncrypt off`, `OIDCSessionType server-cache`, `OIDCCacheType redis`), `mod_auth_openidc`     wrongly performed argument interpolation before passing Redis requests to `hiredis`, which would perform     it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not     appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by     repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing     argument interpolation only once, using the `hiredis` API. As a workaround, this vulnerability can be     mitigated by setting `OIDCCacheEncrypt` to `on`, as cache keys are cryptographically hashed before use     when this option is enabled. (CVE-2021-32785)

  - 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 versions     prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a     result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout     functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect     with slashes to address a particular breaking change between the different specifications (RFC2396 /     RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring     `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.
    (CVE-2021-32786)

  - 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. (CVE-2021-32791)

  - 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, there is an XSS vulnerability in when using `OIDCPreservePost On`.
    (CVE-2021-32792)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2022-3591:01 advisory.

    * mod_auth_openidc: open redirect in oidc_validate_redirect_url() (CVE-2021-32786)
      * mod_auth_openidc: hardcoded static IV and AAD with a reused key in AES GCM encryption (CVE-2021-32791)
      * mod_auth_openidc: XSS when using OIDCPreservePost On (CVE-2021-32792)
      * mod_auth_openidc: open redirect due to target_link_uri parameter not validated (CVE-2021-39191)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2022_1823 advisory.

    * mod_auth_openidc: open redirect in oidc_validate_redirect_url() (CVE-2021-32786)

    * mod_auth_openidc: hardcoded static IV and AAD with a reused key in AES GCM encryption (CVE-2021-32791)

    * mod_auth_openidc: XSS when using OIDCPreservePost On (CVE-2021-32792)

    * mod_auth_openidc: open redirect due to target_link_uri parameter not validated (CVE-2021-39191)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
153452	openSUSE 15 Security Update : apache2-mod_auth_openidc (openSUSE-SU-2021:1277-1)	Nessus	SuSE Local Security Checks	2021/9/17	2023/11/30	medium
252426	Linux Distros Unpatched Vulnerability : CVE-2021-32786	Nessus	Misc.	2025/8/20	2026/8/27	medium
154089	SUSE SLES12 Security Update : apache2-mod_auth_openidc (SUSE-SU-2021:3352-1)	Nessus	SuSE Local Security Checks	2021/10/13	2026/6/25	medium
236723	Alibaba Cloud Linux 3 : 0135: mod_auth_openidc:2.3 (ALINUX3-SA-2022:0135)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	medium
185201	Fedora 39 : mod_auth_openidc (2023-02c84fe305)	Nessus	Fedora Local Security Checks	2023/11/7	2024/11/14	medium
153244	openSUSE 15 Security Update : apache2-mod_auth_openidc (openSUSE-SU-2021:3020-1)	Nessus	SuSE Local Security Checks	2021/9/14	2023/12/1	medium
293904	MiracleLinux 8 : mod_auth_openidc:2.3 (AXSA:2022-3591:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
358140	Rocky Linux 8 [CIQ] Security Update: cjose / cjose-debuginfo / cjose-debugsource / cjose-devel / etc Multiple Vulnerabilities (crlsa-2022_1823)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium

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