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CVE-2021-4231: Low Vulnerability in Angular and AngularJS

A low-severity cross-site scripting vulnerability exists in Angular versions up to 11.0.4 and 11.1.0-next.2. Organizations should prioritize patching to prevent potential exploitation.

LOWCVSS 3.5 · Published May 26, 2022

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A vulnerability was found in Angular up to 11.0.4/11.1.0-next.2. It has been classified as problematic. Affected is the handling of comments. The manipulation leads to cross site scripting. It is possible to launch the attack remotely but it might require an authentication first. Upgrading to version 11.0.5 and 11.1.0-next.3 is able to address this issue. The name of the patch is ba8da742e3b243e8f43d4c63aa842b44e14f2b09. It is recommended to upgrade the affected component.

Vulnerability Details

This vulnerability allows for cross site scripting (XSS) due to improper handling of comments in Angular and AngularJS. The CVSS score for this vulnerability is 3.5, indicating a low severity level. The vulnerability affects Angular versions up to 11.0.4 and 11.1.0-next.2, with a patch available in versions 11.0.5 and 11.1.0-next.3. The vulnerability is classified under CWE-79.

Technical Analysis

The root cause of this vulnerability is the insufficient validation of comments, which leads to the possibility of executing malicious scripts when comments are processed. The attack vector is network-based, with a low attack complexity. It requires low privileges and user interaction for exploitation. The confidentiality impact is none, while the integrity impact is low.

Risk & Impact Analysis

Risk to organizations includes potential unauthorized access to sensitive information through XSS attacks. Given the low severity score, organizations may address this in their routine maintenance cycles. However, since user interaction is required, the exploitability is limited but still presents a risk in environments where user input is processed without adequate validation.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

The affected versions include Angular and AngularJS versions up to 11.0.4 and 11.1.0-next.2. Organizations should upgrade to 11.0.5 or 11.1.0-next.3 to mitigate this vulnerability.

Mitigation & Remediation

Organizations should prioritize patching immediately. Upgrading to the patched versions 11.0.5 and 11.1.0-next.3 is essential to address this vulnerability. If immediate patching is not possible, consider implementing input validation to mitigate the risk of XSS attacks.

Detection Guidance

Monitor logs for unusual comment handling patterns and potential script injections. Behavioral anomalies related to user input processing should also be observed to detect any exploitation attempts.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability highlights the importance of secure coding practices in web frameworks. Security teams should ensure that input validation is a priority in their development processes. For further insights, organizations can explore our security testing best practices and consider implementing a penetration testing methodology to enhance their defenses against similar vulnerabilities.

In conclusion, addressing this vulnerability is crucial to maintaining the integrity of applications built on Angular and AngularJS. Organizations should remain vigilant and proactive in their security measures.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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