GHSA-j6px-jwvv-vpwq Angular Expressions - Remote Code Execution

• npm angular-expressions: < 1.1.2 → fixed in 1.1.2

Impact The vulnerability, reported by GoSecure Inc, allows Remote Code Execution, if you call `expressions.compile(userControlledInput)` where `userControlledInput` is text that comes from user input. This time, the security of the package could be bypassed by using a more complex payload, using a `.constructor.constructor` technique. • If running angular-expressions in the browser, an attacker could run any browser script when the application code calls expressions.compile(userControlledInput). • If running angular-expressions on the server, an attacker could run any Javascript expression, thus gaining Remote Code Execution. Patches Users should upgrade to version 1.1.2 of angular-expressions Workarounds A temporary workaround might be either to : • disable user-controlled input that will be fed into angular-expressions in your application OR • allow only following characters in the userControlledInput : ```js if (/^[|a-zA-Z.0-9 :"'+-?]+$/.test(userControlledInput)) { var result = expressions.compile(userControlledInput); } else { result = undefined; } ``` References Removal of angular-expression sandbox For more information If you have any questions or comments about this advisory: • Open an issue in angular-expressions • Email us Credits The issue was reported by Maxime Nadeau from GoSecure, Inc.