A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning.

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2020:3032 advisory.

  - A flaw was found in mod_auth_openidc before version 2.4.0.1. An open redirect issue exists in URLs with     trailing slashes similar to CVE-2019-3877 in mod_auth_mellon. (CVE-2019-14857)

  - A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a     slash and backslash at the beginning. (CVE-2019-20479)

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

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3409 advisory.

  - A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a     slash and backslash at the beginning. (CVE-2019-20479)

  - 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)

  - mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that     implements the OpenID Connect Relying Party functionality. In versions 2.0.0 through 2.4.13.1, when     `OIDCStripCookies` is set and a crafted cookie supplied, a NULL pointer dereference would occur, resulting     in a segmentation fault. This could be used in a Denial-of-Service attack and thus presents an     availability risk. Version 2.4.13.2 contains a patch for this issue. As a workaround, avoid using     `OIDCStripCookies`. (CVE-2023-28625)

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

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has mod_auth_openidc packages installed that are affected by multiple vulnerabilities:

  - A flaw was found in mod_auth_openidc before version 2.4.0.1. An open redirect issue exists in URLs with     trailing slashes similar to CVE-2019-3877 in mod_auth_mellon. (CVE-2019-14857)

  - A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a     slash and backslash at the beginning. (CVE-2019-20479)

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

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has mod_auth_openidc packages installed that are affected by multiple vulnerabilities:

  - A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a     slash and backslash at the beginning. (CVE-2019-20479)

  - A flaw was found in mod_auth_openidc before version 2.4.0.1. An open redirect issue exists in URLs with     trailing slashes similar to CVE-2019-3877 in mod_auth_mellon. (CVE-2019-14857)

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

The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2020:3032 advisory.

  - mod_auth_openidc: Open redirect in logout url when using URLs with leading slashes (CVE-2019-14857)

  - mod_auth_openidc: Open redirect issue exists in URLs with slash and backslash (CVE-2019-20479)

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

The version of mod24_auth_openidc installed on the remote host is prior to 1.8.8-7.6. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1448 advisory.

    An open redirect flaw was discovered in mod_auth_openidc, where it handles logout redirection. The module     does not correctly validate the URL, allowing a URL with leading slashes to bypass the protection checks.
    A victim user may be tricked into visiting a trusted vulnerable web site, which would redirect them to     another possibly malicious URL. (CVE-2019-14857)

    An open redirect flaw was discovered in mod_auth_openidc where it handles logout redirection. The module     does not correctly validate the URL, allowing a URL with slash and backslash at the beginning to bypass     the protection checks. A victim user may be tricked into visiting a trusted vulnerable web site, which     would redirect him to another, possibly malicious, URL. (CVE-2019-20479)

Tenable has extracted the preceding description block directly from the tested product 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 version of mod_auth_openidc installed on the remote host is prior to 1.8.8-7. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1538 advisory.

    An open redirect flaw was discovered in mod_auth_openidc, where it handles logout redirection. The module     does not correctly validate the URL, allowing a URL with leading slashes to bypass the protection checks.
    A victim user may be tricked into visiting a trusted vulnerable web site, which would redirect them to     another possibly malicious URL. (CVE-2019-14857)

    An open redirect flaw was discovered in mod_auth_openidc where it handles logout redirection. The module     does not correctly validate the URL, allowing a URL with slash and backslash at the beginning to bypass     the protection checks. A victim user may be tricked into visiting a trusted vulnerable web site, which     would redirect him to another, possibly malicious, URL. (CVE-2019-20479)

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

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

Security Fix(es) :

  - mod_auth_openidc: Open redirect in logout url when using     URLs with leading slashes (CVE-2019-14857)

  - mod_auth_openidc: Open redirect issue exists in URLs     with slash and backslash (CVE-2019-20479)

The remote CentOS Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:3970 advisory.

  - A flaw was found in mod_auth_openidc before version 2.4.0.1. An open redirect issue exists in URLs with     trailing slashes similar to CVE-2019-3877 in mod_auth_mellon. (CVE-2019-14857)

  - A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a     slash and backslash at the beginning. (CVE-2019-20479)

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

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2020-3970 advisory.

    - Related: rhbz#1805748 - CVE-2019-20479 mod_auth_openidc: open redirect                               issue exists in URLs with slash and backslash [rhel-7]
    - Resolves: rhbz#1805748 - CVE-2019-20479 mod_auth_openidc: open redirect                                issue exists in URLs with slash and backslash [rhel-7]

Tenable has extracted the preceding description block directly from the Oracle 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 Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:3970 advisory.

    The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an     Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.

    Security Fix(es):

    * mod_auth_openidc: Open redirect in logout url when using URLs with leading slashes (CVE-2019-14857)

    * mod_auth_openidc: Open redirect issue exists in URLs with slash and backslash (CVE-2019-20479)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-3032 advisory.

    - Related: rhbz#1820666 - CVE-2019-14857 mod_auth_openidc:2.3/mod_auth_openidc:
                              Open redirect in logout url when using URLs with                               leading slashes [rhel-8.2.0.z]
    - Related: rhbz#1820662 - CVE-2019-20479 mod_auth_openidc:2.3/mod_auth_openidc:
                              open redirect issue exists in URLs with slash and                               backslash [rhel-8.2.0.z]
    - Related: rhbz#1820666 - CVE-2019-14857 mod_auth_openidc:2.3/mod_auth_openidc:
                              Open redirect in logout url when using URLs with                               leading slashes [rhel-8.2.0.z]
    - Related: rhbz#1820662 - CVE-2019-20479 mod_auth_openidc:2.3/mod_auth_openidc:
                              open redirect issue exists in URLs with slash and                               backslash [rhel-8.2.0.z]
    - Resolves: rhbz#1820666 - CVE-2019-14857 mod_auth_openidc:2.3/mod_auth_openidc:
                               Open redirect in logout url when using URLs with                                leading slashes [rhel-8.2.0.z]

Tenable has extracted the preceding description block directly from the Oracle 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.

Several issues have been found in libapache2-mod-auth-openidc, the OpenID Connect authentication module for the Apache HTTP server.

CVE-2019-14857

Insufficient validation of URLs leads to an Open Redirect vulnerability. An attacker may trick a victim into providing credentials for an OpenID provider by forwarding the request to an illegitimate website.

CVE-2019-20479

Due to insufficient validatation of URLs an Open Redirect vulnerability for URLs beginning with a slash and backslash could be abused.

CVE-2019-1010247

The OIDCRedirectURI page contains generated JavaScript code that uses a poll parameter as a string variable, thus might contain additional JavaScript code. This might result in Criss-Site Scripting (XSS).

For Debian 9 stretch, these problems have been fixed in version 2.1.6-1+deb9u1.

We recommend that you upgrade your libapache2-mod-auth-openidc packages.

For the detailed security status of libapache2-mod-auth-openidc please refer to

its security tracker page at:
https://security-tracker.debian.org/tracker/libapache2-mod-auth-openid c

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3032 advisory.

    The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an     Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.

    Security Fix(es):

    * mod_auth_openidc: Open redirect in logout url when using URLs with leading slashes (CVE-2019-14857)

    * mod_auth_openidc: Open redirect issue exists in URLs with slash and backslash (CVE-2019-20479)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Module stream mod_auth_openidc:2.3 does not have correct module.md file (BZ#1844107)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

Fixes CVE-2019-20479

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for apache2-mod_auth_openidc fixes the following issues :

  - CVE-2019-20479: Fixed an open redirect issue in URLs     with slash and backslash (bsc#1164459).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

This update for apache2-mod_auth_openidc fixes the following issues :

CVE-2019-20479: Fixed an open redirect issue in URLs with slash and backslash (bsc#1164459).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An issue has been found in libapache2-mod-auth-openidc, an OpenID Connect authentication module for Apache.

Due to insufficient validatation of URLs an Open Redirect vulnerability for URLs beginning with a slash and backslash could be abused.

For Debian 8 'Jessie', this problem has been fixed in version 1.6.0-1+deb8u3.

We recommend that you upgrade your libapache2-mod-auth-openidc packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
185006	Rocky Linux 8 : mod_auth_openidc:2.3 (RLSA-2020:3032)	Nessus	Rocky Linux Local Security Checks	medium
174970	Debian DLA-3409-1 : libapache2-mod-auth-openidc - LTS security update	Nessus	Debian Local Security Checks	medium
154486	NewStart CGSL CORE 5.05 / MAIN 5.05 : mod_auth_openidc Multiple Vulnerabilities (NS-SA-2021-0164)	Nessus	NewStart CGSL Local Security Checks	medium
147343	NewStart CGSL CORE 5.04 / MAIN 5.04 : mod_auth_openidc Multiple Vulnerabilities (NS-SA-2021-0039)	Nessus	NewStart CGSL Local Security Checks	medium
145819	CentOS 8 : mod_auth_openidc:2.3 (CESA-2020:3032)	Nessus	CentOS Local Security Checks	medium
142976	Amazon Linux AMI : mod24_auth_openidc (ALAS-2020-1448)	Nessus	Amazon Linux Local Security Checks	medium
141990	Amazon Linux 2 : mod_auth_openidc (ALAS-2020-1538)	Nessus	Amazon Linux Local Security Checks	medium
141696	Scientific Linux Security Update : mod_auth_openidc on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	medium
141633	CentOS 7 : mod_auth_openidc (RHSA-2020:3970)	Nessus	CentOS Local Security Checks	medium
141256	Oracle Linux 7 : mod_auth_openidc (ELSA-2020-3970)	Nessus	Oracle Linux Local Security Checks	medium
141021	RHEL 7 : mod_auth_openidc (RHSA-2020:3970)	Nessus	Red Hat Local Security Checks	medium
140037	Oracle Linux 8 : mod_auth_openidc:2.3 (ELSA-2020-3032)	Nessus	Oracle Linux Local Security Checks	medium
139098	Debian DLA-2298-1 : libapache2-mod-auth-openidc security update	Nessus	Debian Local Security Checks	medium
138799	RHEL 8 : mod_auth_openidc:2.3 (RHSA-2020:3032)	Nessus	Red Hat Local Security Checks	medium
137421	Fedora 32 : mod_auth_openidc (2020-33d51234cd)	Nessus	Fedora Local Security Checks	medium
137420	Fedora 31 : mod_auth_openidc (2020-1106ece93a)	Nessus	Fedora Local Security Checks	medium
134932	openSUSE Security Update : apache2-mod_auth_openidc (openSUSE-2020-376)	Nessus	SuSE Local Security Checks	medium
134656	SUSE SLES12 Security Update : apache2-mod_auth_openidc (SUSE-SU-2020:0706-1)	Nessus	SuSE Local Security Checks	medium
134655	SUSE SLES15 Security Update : apache2-mod_auth_openidc (SUSE-SU-2020:0705-1)	Nessus	SuSE Local Security Checks	medium
134181	Debian DLA-2130-1 : libapache2-mod-auth-openidc security	Nessus	Debian Local Security Checks	medium

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