CVE-2018-1107 : Vulnerability Insights and Analysis

An investigation revealed that an inefficient regular expression was utilized by the JavaScript library known as is-my-json-valid to validate JSON fields designated to have an email format. This could lead to significant CPU usage impact during the validation process.

Understanding CVE-2018-1107

This CVE involves a vulnerability in the is-my-json-valid JavaScript library that could be exploited to cause excessive CPU consumption during JSON validation.

What is CVE-2018-1107?

CVE-2018-1107 is a vulnerability in the is-my-json-valid library due to the use of an inefficient regular expression for validating JSON fields with an email format. Crafted JSON files could trigger high CPU usage during validation.

The Impact of CVE-2018-1107

The vulnerability could be exploited by malicious actors to create specially crafted JSON files that, when validated, consume excessive CPU time, potentially leading to denial of service (DoS) attacks or performance degradation.

Technical Details of CVE-2018-1107

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability arises from the inefficient regular expression used by the is-my-json-valid library to validate JSON fields designated as email format, leading to CPU consumption issues during validation.

Affected Systems and Versions

Product: nodejs-is-my-json-valid
Versions: is-myjson-valid 2.17.2, is-myjson-valid 1.4.1

Exploitation Mechanism

Malicious actors can exploit this vulnerability by crafting JSON files with specific conditions that trigger the inefficient regular expression, causing excessive CPU usage during validation.

Mitigation and Prevention

Protecting systems from CVE-2018-1107 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the is-my-json-valid library to a patched version that addresses the inefficient regular expression issue.
Monitor CPU usage for any unusual spikes that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update libraries and dependencies to ensure known vulnerabilities are patched promptly.
Implement input validation mechanisms to prevent the acceptance of maliciously crafted JSON files.

Patching and Updates

Apply patches provided by the library maintainers to fix the vulnerability and prevent potential exploitation.