In Drupal versions 8.4.x versions before 8.4.5 when using node access controls with a multilingual site, Drupal marks the untranslated version of a node as the default fallback for access queries. This fallback is used for languages that do not yet have a translated version of the created node. This can result in an access bypass vulnerability. This issue is mitigated by the fact that it only applies to sites that a) use the Content Translation module; and b) use a node access module such as Domain Access which implement hook_node_access_records().

-     [8.4.6](https://www.drupal.org/project/drupal/releases/8     .4.6)

  - [SA-CORE-2018-002     (CVE-2018-7600)](https://www.drupal.org/SA-CORE-2018-002     )

  -     [8.4.5](https://www.drupal.org/project/drupal/releases/8     .4.5)

  - [SA-CORE-2018-001 (CVE-2017-6926 / CVE-2017-6927 /     CVE-2017-6930 /     CVE-2017-6931)](https://www.drupal.org/SA-CORE-2018-001)

  -     [8.4.4](https://www.drupal.org/project/drupal/releases/8     .4.4)

  -     [8.4.3](https://www.drupal.org/project/drupal/releases/8     .4.3)

  -     [8.4.2](https://www.drupal.org/project/drupal/releases/8     .4.2)

  -     [8.4.1](https://www.drupal.org/project/drupal/releases/8     .4.1)

  -     [8.4.0](https://www.drupal.org/project/drupal/releases/8     .4.0)

  -     [8.4.0-rc2](https://www.drupal.org/project/drupal/releas     es/8.4.0-rc2)

  -     [8.4.0-rc1](https://www.drupal.org/project/drupal/releas     es/8.4.0-rc1)

  -     [8.4.0-beta1](https://www.drupal.org/project/drupal/rele     ases/8.4.0-beta1)

  -     [8.4.0-alpha1](https://www.drupal.org/project/drupal/rel     eases/8.4.0-alpha1)

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.

According to its self-reported version number, the detected Drupal application is affected by multiple vulnerabilities :

 - A flaw exists with the Comment Reply Form. An authenticated remote attacker could add or view comments that they do not have access to. (CVE-2017-6926)

 - A flaw exists with the Drupal.checkPlain() function due to improper handling of HTML injection. A remote attacker, with a specially crafted request, could potentially execute arbitrary script code within the trust relationship between the browser and server. (CVE-2017-6927)

 - A flaw exists with node access controls with a multilingual site due to defaulting to the untranslated version as a fallback. A remote attacker could potentially bypass access restrictions. (CVE-2017-6930)

 - A flaw exists with the Settings Tray module. A remote attacker could update data the do not have permission for. (CVE-2017-6931)

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

-     [8.3.9](https://www.drupal.org/project/drupal/releases/8     .3.9)

  - [SA-CORE-2018-002     (CVE-2018-7600)](https://www.drupal.org/SA-CORE-2018-002     )

  -     [8.3.8](https://www.drupal.org/project/drupal/releases/8     .3.8)

  - [SA-CORE-2018-001 (CVE-2017-6926 / CVE-2017-6927 /     CVE-2017-6930 /     CVE-2017-6931)](https://www.drupal.org/SA-CORE-2018-001)

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.

According to its self-reported version, the instance of Drupal running on the remote web server is 8.x prior to 8.4.5. It is, therefore, affected by multiple vulnerabilities :

  - A flaw exists with the Comment Reply Form. An authenticated remote     attacker could add or view comments that they do not have access     to. (CVE-2017-6926)

  - A flaw exists with the Drupal.checkPlain() function due to     improper handling of HTML injection. A remote attacker, with a     specially crafted request, could potentially execute arbitrary     script code within the trust relationship between the browser and     server. (CVE-2017-6927)

  - A flaw exists with node access controls with a multilingual site     due to defaulting to the untranslated version as a fallback. A     remote attacker could potentially bypass access restrictions.
    (CVE-2017-6930)

  - A flaw exists with the Settings Tray module. A remote attacker     could update data the do not have permission for. (CVE-2017-6931)

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

Drupal Security Team reports :

CVE-2017-6926: Comment reply form allows access to restricted content

CVE-2017-6927: JavaScript cross-site scripting prevention is incomplete

CVE-2017-6928: Private file access bypass - Moderately Critical

CVE-2017-6929: jQuery vulnerability with untrusted domains - Moderately Critical

CVE-2017-6930: Language fallback can be incorrect on multilingual sites with node access restrictions

CVE-2017-6931: Settings Tray access bypass

CVE-2017-6932: External link injection on 404 pages when linking to the current page

ID	Name	Product	Family	Severity
120615	Fedora 28 : drupal8 (2018-906ba26b4d) (Drupalgeddon 2)	Nessus	Fedora Local Security Checks	critical
98563	Drupal 7.x < 7.57 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
98562	Drupal 8.x < 8.4.5 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
98561	Drupal 8.5.x < 8.5.0-rc1 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
109288	Fedora 26 : drupal8 (2018-922cc2fbaa) (Drupalgeddon 2)	Nessus	Fedora Local Security Checks	critical
107089	Drupal 8.x < 8.4.5 Multiple Vulnerabilities (SA-CORE-2018-001)	Nessus	CGI abuses	high
106994	FreeBSD : drupal -- Drupal Core - Multiple Vulnerabilities (57580fcc-1a61-11e8-97e0-00e04c1ea73d)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2017-6930

high

Tenable Plugins

critical

high

high

high

critical

high

high