CVE-2018-1107: 
JavaScript vulnerability analysis and mitigation

The CVE-2018-1107 vulnerability affects the is-my-json-valid JavaScript library, discovered in versions before 1.4.1 and 2.17.2. The vulnerability was disclosed on February 13, 2018, and involves a Regular Expression Denial of Service (ReDoS) issue when validating JSON fields with email format (Snyk Vuln DB, Red Hat Bugzilla).

The vulnerability stems from an inefficient regular expression (/^\S+@\S+$/) used to validate email fields. When processing specially crafted input, this can result in catastrophic backtracking, causing the validation process to take approximately 10 seconds for data 90K characters in length. The vulnerability has been assigned a CVSS v3.1 base score of 5.3 (medium severity) with attack vector being network-based and requiring no privileges or user interaction (Snyk Vuln DB).

The primary impact of this vulnerability is on system availability. When exploited, it can cause excessive CPU consumption during the validation process of specially crafted input, potentially leading to a denial of service condition. The vulnerability affects the performance of systems using the vulnerable versions of the is-my-json-valid library for email validation (Snyk Vuln DB).

The vulnerability has been fixed in is-my-json-valid versions 2.17.2 and 1.4.1. Users should upgrade to these or later versions to mitigate the issue. The fix was implemented through a patch that improves the email validation regular expression pattern (Red Hat Bugzilla).

Red Hat has classified this vulnerability as having an 'Important' security impact. In the context of Red Hat Quay, the library was identified as a build-time dependency of protractor, with reduced impact due to its non-runtime usage (Red Hat Bugzilla).