A vulnerability was found in Shiba Markdown Live Preview App 1.1.0. It has been declared as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Shiba markdown live preview app version 1.1.0 is vulnerable to XSS which leads to code execution due to enabled node integration.

The bug was discovered 11/29/2017. The weakness was published 01/03/2018 (GitHub Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2017-1000491 since 01/02/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 T1059.007 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 34 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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Vendor

• Shiba

Name

• Markdown Live Preview App

Version

• 1.1.0

License

• open-source

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