Skype for Android stores sensitive user data without encryption in sqlite3 databases that have weak permissions, which allows local applications to read user IDs, contacts, phone numbers, date of birth, instant message logs, and other private information.
Android before 2.3 does not properly restrict access to the system property space, which allows local applications to bypass the application sandbox and gain privileges, as demonstrated by psneuter and KillingInTheNameOf, related to the use of Android shared memory (ashmem) and ASHMEM_SET_PROT_MASK.
