CVE-2021-30612 is a high-severity vulnerability affecting Microsoft Edge and Chromium, specifically related to a use-after-free issue in WebRTC. This vulnerability allows attackers to exploit the affected applications, potentially gaining unauthorized access to sensitive information. The CVSS score for this vulnerability is 8.8, indicating a high level of risk, especially since it requires user interaction to trigger the exploit.
Risk to organizations includes potential exposure of sensitive data, unauthorized system access, and overall disruption of services. The vulnerability is particularly concerning as it can be exploited remotely over the network, which increases the attack surface for organizations using these applications.
Organizations should prioritize patching immediately. Users of Microsoft Edge and Chromium should ensure they are running the latest versions to mitigate the risks associated with this vulnerability.
The vulnerability was published on September 3, 2021, and has been classified as a high risk due to its potential impact on confidentiality, integrity, and availability. As of now, there is no public exploit confirmed for this vulnerability.
Immediate actions should be taken to address this vulnerability in the patch cycle to prevent any potential exploitation.
Vulnerability Details
The official description of CVE-2021-30612 states: 'Use after free in WebRTC.' The vulnerability has a CVSS score of 8.8, classified under CVSS version 3.1. This high score indicates a serious risk, given its potential impact on confidentiality, integrity, and availability.
The affected products include Microsoft Edge and Edge Chromium, particularly versions prior to 93.0.961.38 for Edge and 93.0.4577.63 for Edge Chromium. The vulnerability is associated with CWE-416, which denotes a use-after-free condition.
This vulnerability was disclosed on September 3, 2021, as part of regular security updates by Microsoft and the Fedora Project.
Technical Analysis
The root cause of CVE-2021-30612 lies in the improper handling of memory in WebRTC, leading to a use-after-free vulnerability. Attackers may leverage this flaw to execute arbitrary code in the context of the affected application, especially if user interaction is involved, such as clicking on a malicious link.
The attack vector is network-based, and the complexity of the attack is low, meaning it does not require advanced skills to exploit. No privileges are required to trigger the vulnerability, but user interaction is necessary, which raises the potential for exploitation through phishing or social engineering tactics.
In terms of impact, the vulnerability has high confidentiality, integrity, and availability implications, as it can allow attackers to gain unauthorized access and control over the affected systems.
Risk & Impact Analysis
The real-world risk associated with CVE-2021-30612 is significant, particularly for organizations relying on Microsoft Edge and Chromium for web-based operations. Given the high CVSS score, organizations must recognize the potential for widespread impact if the vulnerability is exploited.
The blast radius for this vulnerability is considerable, as it affects widely used web browsers. Organizations should consider the potential exposure of sensitive information and the implications of unauthorized access, which can lead to data breaches and reputational damage.
With an EPSS score indicating a low probability of exploitation, it is essential to remain vigilant, as attackers may still seek to exploit this vulnerability, especially in environments where user interactions are common.
Given its classification as a high-severity vulnerability, organizations should address it in their priority patch cycle to mitigate risks effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include:
- Fedora 35 - Microsoft Edge versions up to 93.0.961.38 - Microsoft Edge Chromium versions up to 93.0.4577.63
Mitigation & Remediation
To mitigate the risk associated with CVE-2021-30612, organizations should apply the latest patches provided by Microsoft and the Fedora Project. For Microsoft Edge and Edge Chromium, ensure that you are using versions later than 93.0.961.38 and 93.0.4577.63, respectively.
If patching is not immediately feasible, consider implementing additional network controls and monitoring to detect any suspicious activity related to this vulnerability. Configuration hardening of the web browsers can also add an extra layer of protection.
For more comprehensive security validation, organizations should consider engaging in penetration testing services that can help identify potential weaknesses in their security posture.
Detection Guidance
Organizations should monitor their systems for signs of exploitation attempts related to CVE-2021-30612. Key indicators include unusual browser behavior, unexpected crashes, or alerts from security solutions that may indicate attempts to exploit this vulnerability.
Additionally, logging and analyzing user interactions with web applications can help identify potential exploitation paths and provide insight into any attempted attacks.
AppSecure Threat Intelligence Insight
CVE-2021-30612 represents a critical vulnerability in widely used web browsers, highlighting the importance of maintaining updated software to protect against emerging threats. Organizations should be aware of vulnerabilities within their technology stack and prioritize timely patching.
This incident serves as a reminder of the ongoing need for robust security practices. Security teams can benefit from reviewing their vulnerability management processes and ensuring that they are equipped to respond swiftly to similar threats.
To enhance your security posture, consider exploring strategies for penetration testing methodology and vulnerability management programs that can help in proactively identifying and addressing vulnerabilities.
Additionally, keeping abreast of evolving threats through continuous security education and awareness programs is essential for mitigating risks associated with vulnerabilities like CVE-2021-30612.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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