CVE-2021-30883 is a high-severity vulnerability affecting multiple Apple products, including iOS, iPadOS, macOS, tvOS, and watchOS. This vulnerability allows applications to execute arbitrary code with kernel privileges due to a memory corruption issue that has been identified and addressed through improved memory handling. The issue is present in various versions of the affected products and was published on August 24, 2021.
The CVSS score assigned to this vulnerability is 7.8, categorizing it as high severity. This scoring reflects the potential for serious impact, as it could allow attackers to gain control over affected systems, thereby compromising sensitive data and system integrity. Organizations should prioritize patching this vulnerability immediately to mitigate associated risks.
According to Apple, there have been reports suggesting that this vulnerability may have been actively exploited in the wild. Given this context, the urgency for defenders to apply the necessary patches cannot be overstated.
Organizations should ensure that their systems are updated to the latest versions, as detailed in the vendor advisory. This proactive measure will significantly reduce the risk of exploitation of this vulnerability.
Vulnerability Details
The official description of CVE-2021-30883 states: 'A memory corruption issue was addressed with improved memory handling.' This vulnerability is classified under CWE-787, indicating the potential for improper access to memory resources. The affected systems include:
Affected Product | Version |
|---|---|
iOS | 14.8.1 and 15.0.2 |
iPadOS | 14.8.1 and 15.0.2 |
macOS | 11.6.1 and 12.0.1 |
tvOS | 15.1 |
watchOS | 8.1 |
This vulnerability has a CVSS 3.1 score of 7.8, indicating a high severity level. The attack vector is local, with a low attack complexity, requiring no privileges, but necessitating user interaction.
Technical Analysis
The root cause of CVE-2021-30883 is linked to memory handling deficiencies within the affected Apple products. Attackers may exploit this vulnerability by executing arbitrary code with kernel privileges, leading to unauthorized control over the system.
The attack vector is classified as local, meaning that an attacker must have physical or direct access to the device to exploit this vulnerability. The complexity of the attack is low, requiring minimal effort to execute, but user interaction is required to trigger the vulnerability.
Given the potential impacts on confidentiality, integrity, and availability, this vulnerability poses a significant risk to organizations using affected Apple products.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to sensitive data, system integrity breaches, and service disruptions. The blast radius for this vulnerability is extensive, affecting all users of the affected Apple products. Organizations should assess their risk posture and the urgency of remediation based on the CVSS score.
Given the high CVSS score of 7.8 and the confirmed presence in the KEV catalog, urgent action is required. Organizations should prioritize patching immediately and ensure that systems are updated to the latest versions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, specifically those versions mentioned earlier. Organizations should ensure that they are running patched versions of iOS, iPadOS, macOS, tvOS, and watchOS.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the latest updates as provided by Apple. Specifically, updates to iOS 15.0.2, iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1, iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, and macOS Big Sur 11.6.1 should be implemented.
For organizations unable to apply the patch immediately, additional mitigations may include limiting access to devices and enforcing stringent security controls until the updates can be applied.
Organizations should also consider implementing monitoring solutions to detect any unusual behavior that may indicate exploitation attempts.
Detection Guidance
Security teams should monitor logs for indicators of exploitation related to memory corruption issues. Behavioral anomalies, such as unexpected application crashes or unauthorized access attempts, should also be tracked.
Network signatures for unusual traffic patterns and system changes that deviate from established baselines can further aid in detection efforts.
AppSecure Threat Intelligence Insight
CVE-2021-30883 exemplifies the ongoing risks associated with memory corruption vulnerabilities in widely used software. Organizations should understand that such vulnerabilities can lead to significant breaches if not addressed promptly.
This incident highlights the importance of maintaining up-to-date systems and the necessity of a robust vulnerability management program to reduce exposure to these types of risks.
Security teams should also evaluate their incident response plans to ensure they are prepared to handle potential exploitation scenarios effectively.
For more detailed guidance on improving security measures, organizations can refer to our vulnerability management program and consider implementing regular security audits and penetration testing to identify and mitigate vulnerabilities proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)