CVE-2021-31199 is a vulnerability in the Microsoft Enhanced Cryptographic Provider that allows for privilege escalation. This vulnerability has a CVSS score of 5.2, which classifies it as medium severity. The vulnerability arises from improper handling of cryptographic keys, potentially allowing an attacker to gain elevated privileges within the affected system. Organizations must understand the urgency of this vulnerability as it poses a real risk to their systems.
Risk to organizations includes unauthorized access to sensitive data or system functions that should be restricted. With the nature of this vulnerability being local, it emphasizes the importance of securing physical and administrative access to systems. Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
As of now, no public exploit has been confirmed for CVE-2021-31199. However, this does not diminish the necessity for immediate remedial action. Organizations should ensure they are on the latest affected versions or have applied necessary patches as advised by the vendor.
The vulnerability was initially published on June 8, 2021. Since its discovery, it has been analyzed and added to the Known Exploited Vulnerabilities (KEV) catalog, indicating its recognized risk and the requirement for corrective action.
Vulnerability Details
The official description of this vulnerability states: "Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability." This vulnerability allows for privilege escalation, and it is classified under CVSS version 3.1 with a vector string of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. The high-level overview indicates a local attack vector with low attack complexity and low privileges required, which means that an attacker with local access could exploit the vulnerability without any user interaction.
The affected product is the Microsoft Enhanced Cryptographic Provider, impacting various versions of Windows, including Windows 10 (multiple versions), Windows 7, Windows 8.1, and various Windows Server versions. The vulnerability was published on June 8, 2021, and classified as medium severity with a CVSS score of 5.2.
Technical Analysis
The root cause of CVE-2021-31199 is linked to improper handling of cryptographic keys within the Microsoft Enhanced Cryptographic Provider. This vulnerability could enable an attacker to escalate privileges beyond their intended user permissions. The attack vector is local, meaning that it requires physical or administrative access to the affected systems.
The attack complexity is low, as the conditions for exploitation do not require any specific user interaction. Privileges required are also low, meaning that even a standard user on the system could potentially exploit this vulnerability. The impacts on confidentiality and integrity are low, while availability is not affected.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2021-31199 is significant due to its potential for privilege escalation. Organizations running unpatched versions of the affected systems are at risk of unauthorized access to sensitive functions and data. This vulnerability can be exploited by any local user, expanding the attack surface for potential breaches.
The urgency of addressing this vulnerability is high, given its classification as a medium-severity issue with a CVSS score of 5.2. Organizations should prioritize applying available patches to prevent exploitation and protect sensitive data.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected versions of the Microsoft Enhanced Cryptographic Provider include Windows 10 (multiple versions), Windows 7, Windows 8.1, Windows Server 2004, and various other Windows Server versions. Specifically, all versions prior to vendor patch are vulnerable.
Mitigation & Remediation
Organizations should apply the latest patches provided by Microsoft to remediate this vulnerability. For those unable to immediately upgrade, implementing strict access controls and monitoring for suspicious activity can help mitigate risks. Additionally, organizations may consider conducting regular vulnerability assessments to identify and address similar vulnerabilities in their systems.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor system logs for unusual access patterns, especially from local users. Behavioral anomalies that deviate from normal user activities should also be flagged for further investigation.
AppSecure Threat Intelligence Insight
CVE-2021-31199 highlights the ongoing need for organizations to prioritize patch management and vulnerability remediation. The trend of local privilege escalation vulnerabilities underscores the importance of securing physical and administrative access to systems. Organizations are encouraged to bolster their security posture by implementing comprehensive security assessments and adopting proactive security measures.
For further details on vulnerability management best practices, organizations can refer to the vulnerability management program. Additionally, regular penetration testing can identify potential weak points and help mitigate risks.
Organizations should also stay informed about emerging threats and adapt their security strategies accordingly.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)