CVE-2013-4787: Google Android

High severity, CVSS 9.3. EPSS: 13.4% chance of exploitation in the next 30 days.

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.

Affected products

• Google Android: version 1.6 only; version 2.0 only; version 2.0.1 only; version 2.1 only; version 2.2 only; version 2.2.1 only; …

Published 2013-07-09. Last modified 2026-06-16.