A vulnerability has been found in Nuclide and classified as problematic. This vulnerability affects some unknown processing of the component Deep Link Handler. The manipulation of the argument hostname as part of a Parameter leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. CVE summarizes:

The hhvm-attach deep link handler in Nuclide did not properly sanitize the provided hostname parameter when rendering. As a result, a malicious URL could be used to render HTML and other content inside of the editor's context, which could potentially be chained to lead to code execution. This issue affected Nuclide prior to v0.290.0.

The bug was discovered 03/17/2018. The weakness was released 12/31/2018 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2018-6333 since 01/26/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 289 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version v0.290.0 eliminates this vulnerability.

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• Nuclide

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• open-source

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