• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

Auchan discloses data breach: data of hundreds of thousands of customers exposed

 | 

U.S. CISA adds Citrix Session Recording, and Git flaws to its Known Exploited Vulnerabilities catalog

 | 

Docker fixes critical Desktop flaw allowing container escapes

 | 

Malicious apps with +19M installs removed from Google Play because spreading Anatsa banking trojan and other malware

 | 

Pakistan-linked APT36 abuses Linux .desktop files to drop custom malware in new campaign

 | 

Android.Backdoor.916.origin malware targets Russian business executives

 | 

Electronics manufacturer Data I/O took offline operational systems following a ransomware attack

 | 

IoT under siege: The return of the Mirai-based Gayfemboy Botnet

 | 

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 59

 | 

Security Affairs newsletter Round 538 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 

Kidney dialysis firm DaVita confirms ransomware attack compromised data of 2.7M people

 | 

China-linked Silk Typhoon APT targets North America

 | 

Over 300 entities hit by a variant of Atomic macOS Stealer in recent campaign

 | 

Operation Serengeti 2.0: INTERPOL nabs 1,209 cybercriminals in Africa, seizes $97M

 | 

After SharePoint attacks, Microsoft stops sharing PoC exploit code with China

 | 

Former developer jailed after deploying kill-switch malware at Ohio firm

 | 

Colt Discloses Breach After Warlock Ransomware Group Puts Files Up for Sale

 | 

U.S. CISA adds Apple iOS, iPadOS, and macOS flaw to its Known Exploited Vulnerabilities catalog

 | 

Orange Belgium July data breach impacted 850,000 customers

 | 

Apple addressed the seventh actively exploited zero-day

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Mobile
  • ‘doorLock’ – A persistent denial of service flaw affecting iOS 15.2 – iOS 14.7 

‘doorLock’ – A persistent denial of service flaw affecting iOS 15.2 – iOS 14.7 

Pierluigi Paganini January 03, 2022

Expert found a new persistent DoS vulnerability, dubbed ‘doorLock,’ affecting the Apple HomeKit in iOS 14.7 through 15.2.

Security researchers Trevor Spiniolas discovered a new persistent DoS vulnerability, dubbed ‘doorLock,’ affecting the Apple HomeKit in iOS 14.7 through 15.2.

HomeKit is a software framework by Apple, made available in iOS/iPadOS that lets users configure, communicate with, and control smart-home appliances using Apple devices. It provides users with a way to automatically discover such devices and configure them.

Spiniolas speculates that Apple is aware of the flaw since August 10, 2021, but the IT giant has yet to address it.

https://twitter.com/TrevorSpiniolas/status/1477185285784051712

“I believe this bug is being handled inappropriately as it poses a serious risk to users and many months have passed without a comprehensive fix,” writes the researcher. “The public should be aware of this vulnerability and how to prevent it from being exploited, rather than being kept in the dark.” said Spiniolas.

An attacker could trigger the vulnerability by changing the name of a HomeKit device to a string larger than 500,000 characters. Upon loading the string, iOS and iPadOS devices will reboot and will be unusable. The vulnerability can only be exploited by attackers with access to the victim’s ‘Home’ or via manually accepting an invitation to one.

Spinolas released an iOS app that has access to Home data and changes HomeKit device names.

https://youtube.com/watch?v=_BmI5Otsm9I

In order to solve the issue, it is necessary to force a reset of the device that will cause all stored data to be removed. The only way to recover the removed data will be to restore a working backup.

“When the name of a HomeKit device is changed to a large string (500,000 characters in testing), any device with an affected iOS version installed that loads the string will be disrupted, even after rebooting. Restoring a device and signing back into the iCloud account linked to the HomeKit device will again trigger the bug. There are two main scenarios that may occur afterwards, as outlined in the “Effects” section of this document.” wrote the expert.

The expert explained that once the device reboots and the user signs into the same iCloud account linked to the HomeKit device, the doorLock bug will be triggered again.

https://youtu.be/UwbhCliYuDg

“If the bug is triggered on a version of iOS without the limit and the device shares HomeKit data with a device on an iOS version with the limit, both will be still be affected. If a user does not have any Home devices added, the bug can still be triggered by accepting an invitation to a Home that contains a HomeKit device with a large string as its name, even on iOS 15.2.” continues the expert. “The bug can also be triggered on versions without the length limit by simply copying a large string of text and pasting it when manually renaming a Home device, although the Home app may crash when doing so.”

The expert pointed out that that the issue could be exploited by ransomware operators to make devices unusable.

“Applications with access to the Home data of HomeKit device owners may lock them out of their local data and prevent them from logging back into their iCloud on iOS, depending on the iOS version.” states the expert.

Spiniolas explained that it is possible to avoid the exploitation of this issue by disabling Home devices in Control Center. Users are also recommended to be vigilant to invitations to join Home networks of other users.

In order to regain normal access to the iCloud account linked to the data, it is possible to perform the following steps (Tested on iOS 15.2).

If you are not able to install the testing application (most people):

  1. Restore the affected device from Recovery or DFU Mode
  2. Setup the device as normal, but do NOT sign back into the iCloud account
  3. After setup is finished, sign into iCloud from settings. Immediately after doing so, disable the switch labeled “Home.” The device and iCloud should now function again without access to Home data.

If you are able to install the testing application with Xcode and wish to regain access to Home Data:

  1. Restore the affected device from Recovery or DFU Mode
  2. Setup the device as normal, but do NOT sign back into the iCloud account
  3. After setup is finished, sign into iCloud from settings.
  4. Press the back button and then press Control Center settings again to reload the page, and repeat this until a setting labeled “Show Home Controls” is visible. Immediately disable the setting.
  5. Install the test application and run it with a short string to rename all associated Home devices.

Follow me on Twitter: @securityaffairs and Facebook

[adrotate banner=”9″][adrotate banner=”12″]

Pierluigi Paganini

(SecurityAffairs – hacking, IKEA)

[adrotate banner=”5″]

[adrotate banner=”13″]


facebook linkedin twitter

Apple DOS Hacking hacking news information security news iOS IT Information Security mobile Pierluigi Paganini Security Affairs Security News

you might also like

Pierluigi Paganini August 26, 2025
Auchan discloses data breach: data of hundreds of thousands of customers exposed
Read more
Pierluigi Paganini August 25, 2025
Docker fixes critical Desktop flaw allowing container escapes
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    Auchan discloses data breach: data of hundreds of thousands of customers exposed

    Data Breach / August 26, 2025

    U.S. CISA adds Citrix Session Recording, and Git flaws to its Known Exploited Vulnerabilities catalog

    Uncategorized / August 26, 2025

    Docker fixes critical Desktop flaw allowing container escapes

    Security / August 25, 2025

    Malicious apps with +19M installs removed from Google Play because spreading Anatsa banking trojan and other malware

    Malware / August 25, 2025

    Pakistan-linked APT36 abuses Linux .desktop files to drop custom malware in new campaign

    APT / August 25, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT