Apple addresses three zero-day flaws in its WebKit browser engine

Apple has released security updates to patch three zero-days in the WebKit, the Apple’s browser engine, and fixed a zero-day exploited in the wild.

Apple released security updates to address four zero-day vulnerabilities impacting WebKit, which is used by multiple products of the IT giant, including iPadOS, tvOS, and watchOS.

The WebKit browser engine is used by multiple products to display web content.

Apple fixed the three suspected WebKit zero-day flaws, tracked as CVE-2021-30663, CVE-2021-30665, and CVE-2021-30666, with the release of macOS Big Sur 11.3.1, iOS 12.5.3, iOS 14.5.1, iPadOS 14.5.1, and watchOS 7.4.1. The company also fixed the fourth issue, tracked as CVE-2021-30661, with the release of iOS 12.5.3. Apple first patched this flaw in iOS, iPadOS, watchOS, and tvOS.

“Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.” reads the description provided by Apple for all the flaws.

The tech giant did not share technical details about the flaws and how to trigger them.

All the bugs were reported to Apple by researcher @dnpushme from Qihoo 360 ATA.

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Pierluigi Paganini

(SecurityAffairs – hacking, WebKit)

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Pierluigi Paganini

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.