SilverStripe CMS up to 4.5 Upload Stored unrestricted upload

Summaryinfo

A vulnerability identified as problematic has been detected in SilverStripe CMS up to 4.5. This affects an unknown function of the component Upload Handler. The manipulation leads to unrestricted upload (Stored). This vulnerability is listed as CVE-2020-9309. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in SilverStripe CMS up to 4.5 (Content Management System). This issue affects some unknown functionality of the component Upload Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability (Stored). Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is integrity. The summary by CVE is:

Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload contents under allowed file extensions (for example HTML code in a TXT file). When these files are stored as protected or draft files, the MIME detection can cause browsers to execute the file contents. Uploads stored as protected or draft files are allowed by default for authorised users only, but can also be enabled through custom logic as well as modules such as silverstripe/userforms. Sites using the previously optional silverstripe/mimevalidator module can configure MIME whitelists rather than extension whitelists, and hence prevent this issue. Sites on the Common Web Platform (CWP) use this module by default, and are not affected.

The weakness was presented 07/15/2020 (Website). The advisory is shared at silverstripe.org. The identification of this vulnerability is CVE-2020-9309 since 02/20/2020. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-158574 for similar entry. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Content Management System

Vendor

• SilverStripe

Name

• CMS

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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