Apple Zero Day: New iMessage Exploit Uncovered

apple zero day

Security is critical in today’s fast-paced technological world. Companies like Apple are constantly vigilant about protecting their users as cyber threats evolve on a daily basis. On a recent Thursday, Apple acted quickly to address two zero-day vulnerabilities actively exploited by the NSO Group’s Pegasus mercenary spyware. We delve into these vulnerabilities and Apple’s response in this article, shedding light on the implications and broader context of cybersecurity.

The Apple Zero Day Vulnerabilities Unveiled

Apple’s emergency security updates were prompted by the discovery of two critical vulnerabilities:

Apple Zero Day CVE-2023-41061: Wallet’s Validation Issue

The first vulnerability, CVE-2023-41061, centers around a validation issue in Apple’s Wallet app. This flaw had the potential to allow arbitrary code execution when handling a maliciously crafted attachment. In essence, it created a vulnerability that could be exploited to compromise the security of a user’s device.

Apple Zero Day CVE-2023-41064: Image I/O Buffer Overflow

CVE-2023-41064, the second vulnerability, was identified in the Image I/O component. This flaw, a buffer overflow issue, could also result in arbitrary code execution, but this time it happened while processing a maliciously crafted image.

While the Citizen Lab at the University of Toronto’s Munk School discovered CVE-2023-41064, Apple discovered CVE-2023-41061 internally, with some “assistance” from the Citizen Lab.

The Widespread Impact

The significance of these flaws cannot be overstated. To put it into context, these vulnerabilities were weaponized as part of the Apple Zero Day BLASTPASS zero-click iMessage exploit chain. This chain was used to install the infamous Pegasus spyware on fully patched iOS 16.6 iPhones.

This exploit is particularly concerning because it requires no interaction from the victim. The attack began with PassKit attachments containing malicious images sent to the victim from an attacker’s iMessage account. This zero-click capability circumvented Apple’s BlastDoor sandbox framework, which was designed specifically to mitigate such attacks.

The Citizen Lab, which discovered these flaws, emphasized that this discovery demonstrates the ongoing targeting of civil society by highly sophisticated exploits and mercenary spyware. The flaws were discovered during an examination of a device used by an employee of a Washington, D.C.-based civil society organization with international offices.


Apple’s Response

Apple’s response was prompt and thorough. They issued emergency security updates for iOS, iPadOS, macOS, and watchOS to address these flaws and protect their users from harm. It’s worth noting that Cupertino already fixed 13 zero-day bugs earlier this year, demonstrating its dedication to user safety.

The Apple Zero Day Context

The emergence of these zero-day vulnerabilities coincides with geopolitical developments. According to reports, the Chinese government has prohibited central and state government officials from using iPhones and other foreign-branded devices for official purposes. The rationale for this ban was allegedly based on cybersecurity concerns in the midst of an escalating Sino-U.S. trade war.

While iPhones have a reputation for being secure, security experts point out that they are not impervious to espionage. Commercial entities such as NSO have demonstrated the ability to execute 0-click exploits on iPhones over the years, making it difficult for individuals, organizations, and even governments to protect themselves against cyber espionage.


Finally, Apple’s quick response to the CVE-2023-41061 and CVE-2023-41064 vulnerabilities emphasizes the ongoing battle to secure our digital lives. These flaws were not merely theoretical; they were actively being exploited in the wild to compromise user devices.

While Apple’s emergency updates have strengthened their defenses, it’s a stark reminder that no device is immune to threats in the ever-changing landscape of cybersecurity. Users, organizations, and governments must remain vigilant, and companies such as Apple must prioritize security as part of their ongoing mission to protect their users.

In an age when our digital devices are extensions of ourselves, the battle for security must be waged relentlessly, and Apple’s actions demonstrate that commitment.


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