CVE-2021-30733 : Security Advisory and Response
Learn about CVE-2021-30733, a critical out-of-bounds read vulnerability affecting Apple macOS, iOS, and iPadOS, leading to memory disclosure. Update your Apple devices to mitigate risks.
An out-of-bounds read vulnerability affecting Apple macOS, iOS, iPadOS, and watchOS has been identified and patched. This vulnerability could allow an attacker to disclose process memory by exploiting a specially crafted font.
Understanding CVE-2021-30733
This CVE-2021-30733 vulnerability involves an out-of-bounds read that has been mitigated through improved input validation in various Apple operating systems.
What is CVE-2021-30733?
CVE-2021-30733 is an out-of-bounds read vulnerability that could be exploited by processing a maliciously crafted font, leading to the disclosure of process memory in affected Apple devices.
The Impact of CVE-2021-30733
This vulnerability could potentially allow an attacker to access sensitive information stored in the device's memory, posing a risk to user data confidentiality.
Technical Details of CVE-2021-30733
The technical details of CVE-2021-30733 include:
Vulnerability Description
The vulnerability involves an out-of-bounds read that arises during the processing of a specially crafted font, allowing an attacker to access process memory.
Affected Systems and Versions
The following Apple products and versions are impacted by this vulnerability:
- iOS and iPadOS versions earlier than 14.6
- macOS versions earlier than 11.4 and 14.6
- macOS versions earlier than 7.5
Exploitation Mechanism
Exploiting this vulnerability requires an attacker to provide a maliciously crafted font as input, triggering the out-of-bounds read to disclose process memory.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-30733, follow these steps:
Immediate Steps to Take
Users are advised to update their Apple devices to the latest recommended versions to prevent exploitation of this vulnerability.
Long-Term Security Practices
Practicing good cybersecurity hygiene, such as avoiding suspicious links and downloads, can help reduce the likelihood of successful attacks.
Patching and Updates
Regularly applying security updates and patches provided by Apple is crucial to ensure that known vulnerabilities are addressed and the devices are protected against potential threats.