CVE-2021-30755 : What You Need to Know
Learn about CVE-2021-30755, a macOS vulnerability less than 11.4, 14.6, 7.5 from Apple. Understand the impact, affected systems, prevention steps, and more.
This CVE-2021-30755 article provides details about a vulnerability in macOS affecting versions less than 11.4, 14.6, and 7.5, disclosed by Apple.
Understanding CVE-2021-30755
This section delves into the specifics of the CVE-2021-30755 vulnerability and its impact on affected systems.
What is CVE-2021-30755?
CVE-2021-30755 involves the processing of a maliciously crafted font leading to the disclosure of process memory. Apple has provided fixes in macOS Big Sur 11.4, tvOS 14.6, and watchOS 7.5. An out-of-bounds read issue has been resolved through enhanced input validation.
The Impact of CVE-2021-30755
The vulnerability could allow threat actors to access sensitive process memory, potentially leading to unauthorized access to critical information.
Technical Details of CVE-2021-30755
In this section, we explore the technical aspects of the CVE-2021-30755 vulnerability, including its description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises from processing a specially crafted font file, which triggers an out-of-bounds read flaw, enabling memory disclosure.
Affected Systems and Versions
macOS versions less than 11.4, tvOS versions less than 14.6, and watchOS versions less than 7.5 are susceptible to this security issue.
Exploitation Mechanism
Threat actors can exploit this vulnerability by tricking a user into opening a malicious font file, leading to the unauthorized disclosure of process memory.
Mitigation and Prevention
This section outlines the necessary steps to mitigate the risks associated with CVE-2021-30755 and prevent future occurrences.
Immediate Steps to Take
Users are advised to update their systems to the latest macOS Big Sur 11.4, tvOS 14.6, and watchOS 7.5 versions to patch the vulnerability and enhance system security.
Long-Term Security Practices
Implementing robust security practices, such as exercising caution while opening files from unknown sources and regular software updates, can help prevent similar vulnerabilities.
Patching and Updates
Regularly check for security updates from Apple and promptly apply patches to ensure the protection of your systems from known vulnerabilities.