CVE-2021-31937 is a high-severity elevation of privilege vulnerability found in Microsoft Edge (Chromium-based). With a CVSS score of 8.2, this vulnerability poses a significant risk to organizations as it allows attackers to exploit the browser's functionalities under certain conditions. Specifically, the vulnerability arises from improper handling of user interactions, which may enable an attacker to execute arbitrary code or access sensitive data.
The urgency for defenders cannot be understated. Organizations should prioritize patching immediately to prevent unauthorized access and potential data breaches. The vulnerability is classified as network-exploitable with low attack complexity, meaning it can be exploited remotely without requiring extensive resources or capabilities.
Although this vulnerability does not currently have a known public exploit, the potential impact is significant, with high confidentiality impact and low integrity impact. Organizations must remain vigilant and responsive to this risk.
The vulnerability was published on June 28, 2023, and organizations using affected versions of Microsoft Edge (Chromium-based) should take immediate action to ensure their systems are updated.
Vulnerability Details
The official CVE description categorizes this as an elevation of privilege vulnerability. The CVSS score of 8.2 indicates a high severity level, highlighting the importance of remediation. The affected product is Microsoft Edge (Chromium-based), with the vulnerability primarily impacting versions prior to 91.0.864.37.
This vulnerability falls under the CWE-269 classification, which identifies improper privilege management. Organizations are encouraged to review their configurations and user interactions to minimize risks associated with this vulnerability.
Technical Analysis
The root cause of CVE-2021-31937 lies in the improper handling of user interactions within Microsoft Edge. The attack vector is network-based, allowing exploitation without requiring physical access to the target system. Attack complexity is low, meaning that attackers can exploit this vulnerability with minimal effort.
In terms of privileges required, none are needed to exploit this vulnerability, which significantly increases the risk. User interaction is required, as the attacker must trick the user into interacting with a malicious website or content to initiate the attack. The potential impacts include high confidentiality impact, as sensitive data could be accessed, and low integrity impact, as the attack may not alter data.
Risk & Impact Analysis
The real-world deployment risk of this vulnerability is significant due to the widespread use of Microsoft Edge (Chromium-based). The blast radius for this vulnerability can be extensive, potentially affecting all users of the browser. Given the high CVSS score and the ease of exploitation, organizations must take proactive measures to address this vulnerability.
The urgency for remediation is high. Organizations should prioritize updates during their next patch cycle, ensuring they are using versions of Microsoft Edge that have addressed this vulnerability. Failure to do so may lead to unauthorized access and data breaches.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions affected by CVE-2021-31937 are all versions of Microsoft Edge (Chromium-based) prior to 91.0.864.37. Organizations should ensure that their systems are updated to this version or later to mitigate the risk.
Mitigation & Remediation
Organizations should implement the following mitigation strategies to address CVE-2021-31937: apply the latest security patches from Microsoft for Edge. Regularly check for updates to ensure that all systems are running the latest version of the browser.
In addition to applying patches, organizations may consider enhancing their security posture through measures such as network segmentation, user education on safe browsing practices, and continuous security assessments.
Continuous security testing can also help identify and remediate similar vulnerabilities in the organization's infrastructure.
Detection Guidance
To detect potential exploitation of CVE-2021-31937, organizations should monitor logs for unusual user interactions, particularly those involving Microsoft Edge. Behavioral anomalies should be analyzed to identify potential attempts to exploit this vulnerability.
Network signatures and alerts can be set up to detect any malicious activity related to this vulnerability. Additionally, organizations should keep an eye on system changes that could indicate attempted exploitation.
AppSecure Threat Intelligence Insight
CVE-2021-31937 represents a critical lesson for security teams regarding the importance of timely patching and vulnerability management. The trend of elevation of privilege vulnerabilities indicates that attackers are continuously seeking ways to exploit user interactions.
Organizations must prioritize establishing a robust vulnerability management program to address emerging threats effectively. The significance of this vulnerability underlines the necessity for vigilance in monitoring and responding to security advisories.
A well-designed vulnerability management program helps organizations minimize the risks associated with vulnerabilities like CVE-2021-31937, ensuring that they remain secure in an ever-evolving threat landscape.
Penetration testing methodologies should be leveraged to assess and improve security measures continuously.
API penetration testing can also play a crucial role in identifying weaknesses in web applications that may have similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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