CVE-2023-26117: Regular Expression Denial of Service in angular
Summary
CVE-2023-26117: angular vulnerable to regular expression denial of service via the $resource service. Affects angular versions < 1.8.3. No fix is published. How to fix ↓
Also tracked for
- angular.js · Debian:11
The same CVE-2023-26117 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Angular is an open-source JavaScript framework developed by Google. It is widely used for building web applications and provides a comprehensive set of features for creating dynamic and responsive user interfaces. The $resource service in Angular allows developers to interact with RESTful APIs. However, all versions of the package angular are vulnerable to Regular Expression Denial of Service (ReDoS) due to the usage of an insecure regular expression.
Vulnerability Detail
The vulnerability in Angular arises from the insecure regular expression used in the $resource service. An attacker can exploit this vulnerability by providing a large, carefully-crafted input that triggers catastrophic backtracking. This can lead to a denial of service (DoS) attack, where the application becomes unresponsive or crashes. The impact of this vulnerability can be severe, as it can affect the availability and performance of the application.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If upgrading to a fixed version is not immediately feasible, developers can implement input validation and sanitization to mitigate the risk of a ReDoS attack. By carefully validating and limiting the size of user input, the likelihood of triggering catastrophic backtracking can be reduced. Here is an example of input validation using a regular expression in JavaScript:
const input = getUserInput();
const regex = /^[a-zA-Z0-9]+$/;
if (regex.test(input)) {
// Proceed with processing the input
} else {
// Reject the input
}
Conclusion
In conclusion, the angular package is vulnerable to Regular Expression Denial of Service (ReDoS) via the $resource service. It is crucial to update to a fixed version or implement input validation and sanitization to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Angular is an open-source JavaScript framework developed by Google for building web applications. It provides a comprehensive set of features for creating dynamic and responsive user interfaces.
The $resource service in Angular allows developers to interact with RESTful APIs. It provides a high-level interface for performing CRUD operations on server resources.
Regular Expression Denial of Service (ReDoS) is a type of vulnerability that arises when a regular expression is susceptible to catastrophic backtracking. This can be exploited by an attacker to cause a denial of service (DoS) attack.
This vulnerability can lead to a denial of service (DoS) attack, where the application becomes unresponsive or crashes. It can affect the availability and performance of the application.
To mitigate the risk of a ReDoS attack, it is recommended to implement input validation and sanitization. By carefully validating and limiting the size of user input, the likelihood of triggering catastrophic backtracking can be reduced.
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