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openser110-sms.txt

openser110-sms.txt
Posted Dec 29, 2006
Authored by sapheal

A memory corruption condition has been discovered in the OpenSER SMS handling module. Versions 1.1.0 and below are affected.

tags | advisory
SHA-256 | 484303104de315ea5d9fd85799b9664894e8389db532bc70a191c30073f4389e

openser110-sms.txt

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Synopsis:  SMS handling OpenSER remote code executing 
Product: OpenSER
Version: <=1.1.0



Issue:
======

A critical security vulnerability has been found in OpenSER SMS
handling module. The vulnerable function should read the SMS
from the SIM-memory.


Details:
========
int fetchsms(struct modem *mdm, int sim, char* pdu)

The usage of this fuction might lead to memory corruption
conditions. Due to memory corruption conditions remote
code execution is possible. It happens when "beginning"
is copied to functions argument PDU (char*).


Affected Versions
=================

OpenSER <= 1.1.0

Solution
=========

Proper boundary checking.


Exploitation
============

Exploitation might be conducted by preparing a specially
crafted SMS message.




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