CVE-2021-30753 : Security Advisory and Response
Learn about CVE-2021-30753, a critical vulnerability in Apple's iOS, iPadOS, and macOS, allowing process memory disclosure via malicious font processing. Find out impact, affected systems, and mitigation steps.
A vulnerability in Apple products (iOS, iPadOS, macOS) could allow disclosure of process memory when processing a malicious font. The issue has been fixed in the latest updates.
Understanding CVE-2021-30753
This CVE describes an out-of-bounds read vulnerability that was addressed with improved input validation by Apple.
What is CVE-2021-30753?
CVE-2021-30753 is a vulnerability that could result in the disclosure of process memory due to processing a specially crafted font. Apple has released updates to address this issue.
The Impact of CVE-2021-30753
The impact of this vulnerability is the potential exposure of sensitive process memory data to unauthorized parties, posing a risk to user security and privacy.
Technical Details of CVE-2021-30753
The vulnerability arises from processing a malicious font, leading to an out-of-bounds read scenario. The affected versions of iOS, iPadOS, and macOS have been specified.
Vulnerability Description
CVE-2021-30753 allows attackers to access process memory via a specially crafted font file, potentially compromising sensitive data.
Affected Systems and Versions
Apple's iOS, iPadOS, and macOS versions less than specific updates (iOS 14.6, macOS 11.4) are affected by this vulnerability.
Exploitation Mechanism
By leveraging a malicious font file, threat actors can trigger this vulnerability, gaining unauthorized access to process memory.
Mitigation and Prevention
To safeguard against CVE-2021-30753, users are advised to take immediate steps to secure their devices and implement long-term security practices.
Immediate Steps to Take
Apply the latest updates provided by Apple for affected systems to patch the vulnerability and enhance security.
Long-Term Security Practices
Maintain a proactive approach to security by regularly updating devices, exercising caution when downloading and opening files, and utilizing security software.
Patching and Updates
Keep systems up to date with the latest software versions and security patches to mitigate the risk of vulnerabilities like CVE-2021-30753.