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5.7 KiB
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139 lines
No EOL
5.7 KiB
Text
Source: https://cxsecurity.com/issue/WLB-2016110046
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iOS 10.1.x Remote memory corruption through certificate file
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Credit: Maksymilian Arciemowicz from https://cxsecurity.com
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0. Short description
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Special crafted certificate file may lead to memory corruption of several processes and the vector attack may be through Mobile Safari or Mail app. Attacker may control the overflow through the certificate length in OCSP field
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1. Possible vectors of attack
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- Apple Mail (double click on certificate)
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- Safari Mobile ( go to special crafted link eg https://cert.cx/appleios10/700k.php which will redirect you to CRT file )
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- other unspecified
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--------------------------------------------------------------------------------------
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2. Symptoms of memory overflow
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By appropriate length of the certificate, an attacker can trigger crash of:
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- profiled
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- Preferences
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- other unexpected behaviors
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3. Crash log:
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- profiled
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{"app_name":"profiled","app_version":"","bug_type":"109","timestamp":"2016-09-20 09:15:09.85 +0200","os_version":"iPhone OS 10.0.1 (14A403)","incident_id":"XXXXXXXXXXXXXX","slice_uuid":"XXXXXXXXXXXXXX","build_version":"","is_first_party":true,"share_with_app_devs":false,"name":"profiled"}
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Incident Identifier: XXXXXXXXXXXXXX
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CrashReporter Key: XXXXXXXXXXXXXX
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Hardware Model: iPhone6,2
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Process: profiled [1595]
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Path: /System/Library/PrivateFrameworks/ManagedConfiguration.framework/Support/profiled
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Identifier: profiled
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Version: ???
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Code Type: ARM-64 (Native)
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Role: Unspecified
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Parent Process: launchd [1]
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Coalition: <none> [253]
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Date/Time: 2016-09-20 09:15:09.7892 +0200
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Launch Time: 2016-09-20 09:15:01.1603 +0200
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OS Version: iPhone OS 10.0.1 (14A403)
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Report Version: 104
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Exception Type: EXC_BAD_ACCESS (SIGSEGV)
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Exception Subtype: KERN_INVALID_ADDRESS at 0x000000016e193ca0
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Termination Signal: Segmentation fault: 11
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Termination Reason: Namespace SIGNAL, Code 0xb
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Terminating Process: exc handler [0]
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Triggered by Thread: 2
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---------------------------------------------------------------
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- Preferences
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{"app_name":"Preferences","timestamp":"2016-09-20 01:11:44.56 +0200","app_version":"1","slice_uuid":"XXXXXXXXXXX","adam_id":0,"build_version":"1.0","bundleID":"com.apple.Preferences","share_with_app_devs":false,"is_first_party":true,"bug_type":"109","os_version":"iPhone OS 10.0.1 (14A403)","incident_id":"XXXXXXXXXXX","name":"Preferences"}
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Incident Identifier: XXXXXXXXXXX
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CrashReporter Key: XXXXXXXXXXX
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Hardware Model: iPhone6,2
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Process: Preferences [1517]
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Path: /Applications/Preferences.app/Preferences
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Identifier: com.apple.Preferences
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Version: 1.0 (1)
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Code Type: ARM-64 (Native)
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Role: Foreground
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Parent Process: launchd [1]
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Coalition: com.apple.Preferences [754]
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Date/Time: 2016-09-20 01:11:43.4478 +0200
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Launch Time: 2016-09-20 01:10:54.3002 +0200
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OS Version: iPhone OS 10.0.1 (14A403)
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Report Version: 104
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Exception Type: EXC_BAD_ACCESS (SIGSEGV)
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Exception Subtype: KERN_INVALID_ADDRESS at 0x000000016fc6df90
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Termination Signal: Segmentation fault: 11
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Termination Reason: Namespace SIGNAL, Code 0xb
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Terminating Process: exc handler [0]
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Triggered by Thread: 0
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---------------------------------------------------------------
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Logs:
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==============================
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Sep 20 20:17:02 xscxsc com.apple.CoreSimulator.SimDevice.27D...8F.launchd_sim[1905] (com.apple.managedconfiguration.profiled[3085]): Service exited due to signal: Segmentation fault: 11
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Sep 20 20:17:02 xscxsc MobileSafari[2870]: (Error) MC: Queue data for acceptance error. Error: NSError:
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Desc : Couldn’t communicate with a helper application.
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Sugg : Try your operation again. If that fails, quit and relaunch the application and try again.
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Domain : NSCocoaErrorDomain
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Code : 4097
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Extra info:
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{
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NSDebugDescription = "connection to service named com.apple.managedconfiguration.profiled";
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}
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Sep 20 20:17:02 xscxsc profiled[3133]: (Note ) profiled: Service starting...
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==============================
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--------------------------------------------------------------------------------------
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4. PoC
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https://cert.cx/appleios10/300k.php
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https://cert.cx/appleios10/500k.php
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https://cert.cx/appleios10/700k.php
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https://cert.cx/appleios10/900k.php
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or https://cert.cx/appleios10/expl.html
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just click on this link by using Safari.
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EDB Proofs of Concept Mirror:
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40906.zip
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--------------------------------------------------------------------------------------
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5. Safari and sandbox
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How is possible that safari don't ask user before run 'Preferences' app to start process of importing certificate? Safari automatically start new process without asking user for acceptance of this operation what can be exploited through http redirect to untrusted content.
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6. References
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CAPEC-44: Overflow Binary Resource File
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https://capec.mitre.org/data/definitions/44.html
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https://cert.cx/
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https://cxsecurity.com/
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Best Regards/Pozdrowienia/С наилучшими пожеланиями
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Maksymilian Arciemowicz
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References:
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https://support.apple.com/HT207422
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https://support.apple.com/HT207425
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https://support.apple.com/HT207426
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https://cert.cx/appleios10/300k.php
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https://cert.cx/appleios10/500k.php
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https://cert.cx/appleios10/700k.php
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https://cert.cx/appleios10/900k.php
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https://cert.cx/appleios10/expl.html
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https://capec.mitre.org/data/definitions/44.html |