A vulnerability was found in cpp-ethereum JSON-RPC (unknown version). It has been classified as critical. Affected is an unknown code block of the component miner_setEtherbase API. The manipulation as part of a JSON Request leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An exploitable improper authorization vulnerability exists in miner_setEtherbase API of cpp-ethereum's JSON-RPC (commit 4e1015743b95821849d001618a7ce82c7c073768). A JSON request can cause an access to the restricted functionality resulting in authorization bypass.

The bug was discovered 01/09/2018. The weakness was released 01/19/2018 by Cisco with Cisco Talos (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2017-12115 since 07/31/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1548.002.

The vulnerability was handled as a non-public zero-day exploit for at least 10 days. During that time the estimated underground price was around $0-$5k.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 102475†).

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• cpp-ethereum

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• JSON-RPC

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