hugo up to 0.139.3 Markdown Attribute render-link.html cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in hugo up to 0.139.3. The impacted element is an unknown function of the file _default/_markup/render-link.html of the component Markdown Attribute Handler. This manipulation causes cross site scripting. This vulnerability appears as CVE-2024-55601. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in hugo up to 0.139.3. It has been declared as problematic. Affected by this vulnerability is some unknown processing of the file _default/_markup/render-link.html of the component Markdown Attribute Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Hugo is a static site generator. Starting in version 0.123.0 and prior to version 0.139.4, some HTML attributes in Markdown in the internal templates listed below not escaped in internal render hooks. Those whoa re impacted are Hugo users who do not trust their Markdown content files and are using one or more of these templates: `_default/_markup/render-link.html` from `v0.123.0`; `_default/_markup/render-image.html` from `v0.123.0`; `_default/_markup/render-table.html` from `v0.134.0`; and/or `shortcodes/youtube.html` from `v0.125.0`. This issue is patched in v0.139.4. As a workaround, one may replace an affected component with user defined templates or disable the internal templates.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2024-55601 since 12/09/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:_default/_markup/render-link.html it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 248380 (Linux Distros Unpatched Vulnerability : CVE-2024-55601), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.139.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 54398f8d572c689f9785d59e907fd910a23401b0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (248380). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• hugo

Version

• 0.139.0
• 0.139.1
• 0.139.2
• 0.139.3

License

• open-source

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Be aware that VulDB is the high quality source for vulnerability data.

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