#[+] Title: Telegram - Input Length Handling Denial of Service Vulnerability #[+] Product: Telegram #[+] Vendor: http://telegram.org/ #[+] SoftWare Link : https://itunes.apple.com/en/app/telegram-messenger/id686449807?mt=8 #[+] Vulnerable Version(s): Telegram 3.2 on IOS 9.0.1 # # # Author : Mohammad Reza Espargham # Linkedin : https://ir.linkedin.com/in/rezasp # E-Mail : me[at]reza[dot]es , reza.espargham[at]gmail[dot]com # Website : www.reza.es # Twitter : https://twitter.com/rezesp # FaceBook : https://www.facebook.com/mohammadreza.espargham #Demo : https://youtu.be/fszP8jyJN0M # 1. open your phone contacts / add contact # 2. Past 5000 X ?A? in your contact name / save contact # 3. Open telegram and goto ?Contact" # 4. Crashed ;) Debug Report {"app_name":"Telegram","timestamp":?2015-xx-xx","app_version":"3.2":"ph.telegra.Telegraph","share_with_app_devs":false,"is_first_party":false"os_version":"iPhone OS 9.0.1 (13A404)","name":"Telegram"} Incident Identifier: xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx CrashReporter Key: 7e3613t9t457ge3a2en22fc58e7rr44r49311297 Hardware Model: iPhone6,1 Process: Telegram [616] Path: /private/var/mobile/Containers/Bundle/Application/xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx/Telegram.app/Telegram Identifier: ph.telegra.Telegraph Code Type: ARM-64 (Native) Parent Process: launchd [1] Date/Time: 2015-xx-xx 03:12:02.02 Launch Time: 2015-xx-xx 23:03:12.12 OS Version: iOS 9.0.1 (13A404) Exception Type: EXC_CRASH (SIGILL) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Triggered by Thread: 0 Filtered syslog: None found Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_kernel.dylib 0x000000019b578c30 0x19b578000 + 3120 1 libsystem_kernel.dylib 0x000000019b578aac 0x19b578000 + 2732 2 CoreFoundation 0x0000000186100168 0x186024000 + 901480 3 CoreFoundation 0x00000001860fde6c 0x186024000 + 892524 4 CoreFoundation 0x000000018602cdc0 0x186024000 + 36288 5 GraphicsServices 0x0000000191180088 0x191174000 + 49288 6 UIKit 0x000000018b706f60 0x18b68c000 + 503648 7 Telegram 0x0000000100016f70 0x100000000 + 94064 8 libdyld.dylib 0x000000019b4768b8 0x19b474000 + 10424 Activity ID: 0x0000000000042ea5 Activity Name: send control actions Activity Image Path: /System/Library/Frameworks/UIKit.framework/UIKit Activity Offset: 0x00032b34 Activity Running Time: 0.980331 sec