A vulnerability was found in Swagger Parser and Codegen (the affected version is unknown). It has been classified as critical. This affects an unknown code of the component YAML Parser. The manipulation with an unknown input leads to a code vulnerability. CWE is classifying the issue as CWE-17. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in Swagger-Parser's version <= 1.0.30 and Swagger codegen version <= 2.2.2 yaml parsing functionality results in arbitrary code being executed when a maliciously crafted yaml Open-API specification is parsed. This in particular, affects the 'generate' and 'validate' command in swagger-codegen (<= 2.2.2) and can lead to arbitrary code being executed when these commands are used on a well-crafted yaml specification.

The bug was discovered 11/16/2017. The weakness was published 11/27/2017 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2017-1000207 since 11/27/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 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.

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• Swagger

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• Codegen
• Parser

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