CVE-2021-30773 : Security Advisory and Response
Learn about CVE-2021-30773, a code signature validation issue in Apple iOS, tvOS, and watchOS versions less than 14.7 and 7.6, allowing malicious apps to bypass security checks.
Apple addressed an issue in code signature validation in iOS, tvOS, and watchOS by enhancing checks to prevent code signing bypass. This CVE-2021-30773 affects versions less than iOS 14.7, tvOS 14.7, and watchOS 7.6.
Understanding CVE-2021-30773
This CVE pertains to a vulnerability in Apple's code signature validation process that could allow a malicious application to bypass code signing checks.
What is CVE-2021-30773?
CVE-2021-30773 is a security vulnerability in iOS, tvOS, and watchOS that could enable a malicious application to circumvent code signature verification, posing a risk to device security.
The Impact of CVE-2021-30773
The impact of this vulnerability is significant as it could allow unauthorized and potentially malicious apps to operate on affected devices, potentially compromising user data or device functionality.
Technical Details of CVE-2021-30773
This section covers the specific technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from insufficient code signature validation in iOS, tvOS, and watchOS versions prior to 14.7 and 7.6 respectively, enabling malicious apps to evade detection.
Affected Systems and Versions
iOS versions earlier than 14.7, tvOS versions older than 14.7, and watchOS versions less than 7.6 are affected by this vulnerability, making devices using these versions susceptible to exploitation.
Exploitation Mechanism
Exploiting this vulnerability involves a malicious application leveraging the flaw in code signature validation to pass as legitimate software, evading security measures.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-30773, immediate action and long-term security practices are crucial.
Immediate Steps to Take
Users should update their devices to the latest iOS, tvOS, and watchOS versions, namely 14.7 and 7.6, to patch the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Maintaining regular system updates, avoiding untrusted apps, and being cautious while granting permissions can enhance device security and protect against similar vulnerabilities.
Patching and Updates
Apple has released fixes for this vulnerability in iOS 14.7, tvOS 14.7, and watchOS 7.6. Users are advised to promptly install these updates to secure their devices.