CVE-2022-26715 in macOS
Summary
by MITRE • 05/26/2022
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in Security Update 2022-004 Catalina, macOS Monterey 12.4, macOS Big Sur 11.6.6. An application may be able to gain elevated privileges.
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Analysis
by VulDB Data Team • 05/28/2022
The vulnerability identified as CVE-2022-26715 represents a critical out-of-bounds write flaw that exists within Apple's operating system components. This issue stems from insufficient bounds checking mechanisms that allow malicious applications to write data beyond the allocated memory boundaries. The vulnerability specifically affects macOS versions prior to the security updates released in 2022, creating a persistent risk for systems running older versions of the operating system. The flaw operates at a fundamental level within the memory management subsystem, where proper validation of array indices and buffer limits fails to prevent unauthorized memory access patterns.
The technical implementation of this vulnerability enables an attacker to exploit memory corruption through carefully crafted applications that can manipulate memory boundaries beyond their intended limits. This type of flaw falls under the CWE-787 category of out-of-bounds write conditions, where the system fails to validate memory access parameters before executing write operations. The vulnerability's exploitation pathway typically involves an application that can leverage the improper bounds checking to overwrite adjacent memory locations, potentially leading to arbitrary code execution or privilege escalation. The attack surface extends to any application that interacts with memory management functions or processes user-supplied data that could trigger the vulnerable code path.
From an operational perspective, the impact of CVE-2022-26715 extends beyond simple memory corruption as it provides potential for privilege escalation attacks that could allow malicious software to gain elevated system privileges. This capability significantly increases the attack vector's severity since it enables adversaries to bypass standard user permissions and potentially access sensitive system resources. The vulnerability affects the core operating system functionality and could be exploited in various attack scenarios including malware installation, system compromise, or data exfiltration operations. Organizations running affected macOS versions face increased risk of sophisticated attacks that leverage this memory corruption flaw to establish persistent access to their systems.
The remediation for this vulnerability requires immediate installation of the security updates released by Apple, specifically Security Update 2022-004 for macOS Catalina, macOS Monterey 12.4, and macOS Big Sur 11.6.6. System administrators should prioritize deployment of these updates across all affected devices to eliminate the risk of exploitation. Additional mitigations include implementing application whitelisting policies to prevent unauthorized applications from executing, monitoring for suspicious memory access patterns, and maintaining comprehensive system monitoring to detect potential exploitation attempts. The vulnerability's classification under ATT&CK technique T1068 indicates it could be used for privilege escalation, making it particularly dangerous in enterprise environments where system integrity and user access controls are paramount. Organizations should also consider implementing network segmentation and access controls to limit the potential impact if exploitation occurs, while maintaining regular security assessments to identify and remediate similar vulnerabilities in their technology stack.