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ZTE AC3633R Authentication Bypass / Denial Of Service

ZTE AC3633R Authentication Bypass / Denial Of Service
Posted May 19, 2015
Authored by vishnu raju

ZTE AC3633R suffers from authentication bypass and denial of service vulnerabilities.

tags | exploit, denial of service, vulnerability, bypass
MD5 | 41a3438294c6232bc37779926d15f72f

ZTE AC3633R Authentication Bypass / Denial Of Service

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Greetings from vishnu (@dH4wk)

1. Vulnerable Product Version

- ZTE AC3633R (MTS Ultra Wifi Modem)

2. Vulnerability Information

(A) Authentication Bypass
Impact: Attacker gains administrative access
Remotely Exploitable: UNKNOWN
Locally Exploitable: YES

(B) Device crash which results in reboot
Impact: Denial of service, The crash may lead to RCE locally thus
attaining root privilege on the device
Remotely Exploitable: UNKNOWN
Locally Exploitable: YES

3. Vulnerability Description

(A) The administrative authentication mechanism of the modem can be
bypassed by feeding with a string of 121 characters in length, either in
username or password field.

(B) A crash causes the modem to restart. This is caused when either of
the password or username fields are fed with an input of 130 characters
or above.

[Note: If username is targeted for exploitation, then password field shall
be fed with minimum 6 characters (any characters) and vice versa ]


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