A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the mod_auth_mellon-0.17.0-6.el9 build changelog.

  - Open Redirect vulnerability in logout URLs (CVE-2021-3639)

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

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:1934 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

The version of mod24_auth_mellon installed on the remote host is prior to 0.14.0-2.10. It is, therefore, affected by a vulnerability as referenced in the ALAS-2023-1765 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

The version of mod_auth_mellon installed on the remote host is prior to 0.14.0-9. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2077 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

Note that Nessus has not tested for this issue 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-3359 advisory.

  - mod_auth_mellon through 0.14.2 has an Open Redirect via the login?ReturnTo= substring, as demonstrated by     omitting the // after http: in the target URL. (CVE-2019-13038)

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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 a vulnerability as referenced in the ELSA-2022-1934 advisory.

    [0.14.0-12.1]
    - Resolves: rhbz#1986805 - CVE-2021-3639 mod_auth_mellon: Open Redirect                                vulnerability in logout URLs [rhel-8]

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

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

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2022:1934 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:1934 advisory.

    The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the     SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions     generated by an IdP server.

    Security Fix(es):

    * mod_auth_mellon: Open Redirect vulnerability in logout URLs (CVE-2021-3639)

    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 8.6 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 this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2022:1934 advisory.

  - mod_auth_mellon: Open Redirect vulnerability in logout URLs (CVE-2021-3639)

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2022:1524-1 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

According to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

The remote Ubuntu 21.04 host has a package installed that is affected by a vulnerability as referenced in the USN-5069-2 advisory.

    USN-5069-1 fixed a vulnerability in mod-auth-mellon. This update provides the corresponding updates for     Ubuntu 21.04.



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

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

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-5069-1 advisory.

    It was discovered that mod-auth-mellon incorrectly filtered certain URLs. A remote attacker could possibly     use this issue to perform an open redirect attack.

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

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

The remote SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2021:2912-1 advisory.

  - A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be     used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web     application URL that redirects to an external and potentially malicious server. The highest threat from     this liability is to confidentiality and integrity. (CVE-2021-3639)

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

ID	Name	Product	Family	Severity
195552	RHEL 7 : mod_auth_mellon (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	medium
195521	RHEL 6 : mod_auth_mellon (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	medium
191271	CentOS 9 : mod_auth_mellon-0.17.0-6.el9	Nessus	CentOS Local Security Checks	medium
184553	Rocky Linux 8 : mod_auth_mellon (RLSA-2022:1934)	Nessus	Rocky Linux Local Security Checks	medium
177067	Amazon Linux AMI : mod24_auth_mellon (ALAS-2023-1765)	Nessus	Amazon Linux Local Security Checks	medium
176918	Amazon Linux 2 : mod_auth_mellon (ALAS-2023-2077)	Nessus	Amazon Linux Local Security Checks	medium
172487	Debian DLA-3359-1 : libapache2-mod-auth-mellon - LTS security update	Nessus	Debian Local Security Checks	medium
161322	Oracle Linux 8 : mod_auth_mellon (ELSA-2022-1934)	Nessus	Oracle Linux Local Security Checks	medium
161094	AlmaLinux 8 : mod_auth_mellon (ALSA-2022:1934)	Nessus	Alma Linux Local Security Checks	medium
161033	RHEL 8 : mod_auth_mellon (RHSA-2022:1934)	Nessus	Red Hat Local Security Checks	medium
160953	CentOS 8 : mod_auth_mellon (CESA-2022:1934)	Nessus	CentOS Local Security Checks	medium
160522	SUSE SLES15 Security Update : apache2-mod_auth_mellon (SUSE-SU-2022:1524-1)	Nessus	SuSE Local Security Checks	medium
159259	EulerOS 2.0 SP8 : mod_auth_mellon (EulerOS-SA-2022-1354)	Nessus	Huawei Local Security Checks	medium
154400	EulerOS 2.0 SP3 : mod_auth_mellon (EulerOS-SA-2021-2597)	Nessus	Huawei Local Security Checks	medium
153688	EulerOS 2.0 SP5 : mod_auth_mellon (EulerOS-SA-2021-2511)	Nessus	Huawei Local Security Checks	medium
153156	Ubuntu 21.04 : mod-auth-mellon vulnerability (USN-5069-2)	Nessus	Ubuntu Local Security Checks	medium
153142	Ubuntu 18.04 LTS / 20.04 LTS : mod-auth-mellon vulnerability (USN-5069-1)	Nessus	Ubuntu Local Security Checks	medium
153020	SUSE SLES12 Security Update : apache2-mod_auth_mellon (SUSE-SU-2021:2912-1)	Nessus	SuSE Local Security Checks	medium

Detections

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CVE-2021-3639

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Tenable Plugins

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