A vulnerability, which was classified as critical, has been found in Restlet Framework up to 2.3.11. Affected by this issue is an unknown code block of the component REST API HTTP Request Handler. The manipulation with an unknown input leads to a xml external entity vulnerability. Using CWE to declare the problem leads to CWE-611. The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Restlet Framework before 2.3.12 allows remote attackers to access arbitrary files via a crafted REST API HTTP request that conducts an XXE attack, because only general external entities (not parameter external entities) are properly considered. This is related to XmlRepresentation, DOMRepresentation, SaxRepresentation, and JacksonRepresentation.

The bug was discovered 10/02/2017. The weakness was presented 11/30/2017 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2017-14949 since 09/29/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 59 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.3.12 eliminates this vulnerability.

See 71848 for similar entry.

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