This week, Apple addressed and patched three critical zero-day vulnerabilities that pose a significant threat to all Apple product users, including iPad, Apple Watch, macOS, and iPhone devices. This brings the total number of zero-days fixed by Apple this year to 16. 



CVE-2023-41991, found within the Security framework, can be exploited by a malicious application, allowing it to circumvent signature validation.  

CVE-2023-41993, situated within the WebKit browser engine, may be triggered through the handling of specially crafted web content, potentially resulting in arbitrary code execution. 

CVE-2023-41992 is found in the Kernel Framework. This vulnerability can be exploited by attackers to escalate privileges. 

Impacted devices are as follows:  

  • iPhone 8 and later 
  • iPad mini 5th generation and later 
  • Macs running macOS Monterey and newer 
  • Apple Watch Series 4 and later 

Apple has fixed the vulnerabilities in the following software versions: 

Apple acknowledges that these vulnerabilities may have been actively exploited in versions of iOS prior to iOS 16.7, emphasizing the urgency of updating your devices. These vulnerabilities have the potential to facilitate the deployment of the NSO Group's Pegasus spyware.  

To protect your devices and data, Avertium strongly recommends updating your Apple products immediately. Apple has released updates for iOS, iPadOS, macOS, watchOS, and Safari.  



avertium's recommendationS

As previously mentioned, Apple has fixed the vulnerabilities in the below software versions. Please click on the links for more information, while making sure to update your devices as soon as possible.  




At this time, there are no known IoCs associated with CVE-2023-41991, CVE-2023-41992, and CVE-2023-41993. Avertium remains vigilant in locating IoCs for our customers. Should any be located, Avertium will disclose them as soon as possible. For more information on how Avertium can help protect your organization, please reach out to your Avertium Service Delivery Manager or Account Executive.   



How Avertium is Protecting Our CUSTOMERS

While Apple products are not widely used at an enterprise level, these devices could provide an attack vector to company executives. Avertium is raising awareness among our customers to patch this vulnerability before it’s too late.  


Apple fixes 3 zero-day vulnerabilities exploited to compromise iPhones - Help Net Security 

Apple emergency updates fix 3 new zero-days exploited in attacks (bleepingcomputer.com) 

Kernel | Apple Developer Documentation 

Security | Apple Developer Documentation 

WebKit | Apple Developer Documentation 

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