Description
Android 1.6 Donut through 4.2 Jelly Bean does not properly check cryptographic signatures for applications, which allows attackers to execute arbitrary code via an application package file (APK) that is modified in a way that does not violate the cryptographic signature, probably involving multiple entries in a Zip file with the same name in which one entry is validated but the other entry is installed, aka Android security bug 8219321 and the "Master Key" vulnerability.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- Google Android - 'APK' code Remote Security Bypass EDB-38627 · remote · Jul 3, 2013 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 60952 vdb-entry
- https://jira.cyanogenmod.org/browse/CYAN-1602
- https://plus.google.com/113331808607528811927/posts/GxDA6111vYy
- http://www.zdnet.com/google-releases-fix-to-oems-for-blue-security-android-security-hole-7000017782/
- http://bluebox.com/corporate-blog/bluebox-uncovers-android-master-key/
- 94773 vdb-entry
- http://review.cyanogenmod.org/#/c/45251/