fs-git 1.0.1 child_process.exec buildCommand command injection

Summaryinfo

A vulnerability labeled as critical has been found in fs-git 1.0.1. Affected by this vulnerability is the function buildCommand of the file child_process.exec. Such manipulation leads to command injection. This vulnerability is traded as CVE-2017-1000451. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in fs-git 1.0.1 (Versioning Software) and classified as critical. Affected by this issue is the function buildCommand of the file child_process.exec. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

fs-git is a file system like api for git repository. The fs-git version 1.0.1 module relies on child_process.exec, however, the buildCommand method used to construct exec strings does not properly sanitize data and is vulnerable to command injection across all methods that use it and call exec.

The bug was discovered 08/29/2017. The weakness was shared 01/02/2018 (Website). The advisory is available at nodesecurity.io. This vulnerability is handled as CVE-2017-1000451 since 01/02/2018. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 126 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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Productinfo

Type

• Versioning Software

Name

• fs-git

Version

• 1.0.1

CPE 2.3info

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CPE 2.2info

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