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Samsung Printer Backdoor

Samsung Printer Backdoor
Posted Nov 28, 2012
Authored by Neil Smith | Site kb.cert.org

Samsung Printer firmware contains a backdoor administrator account.

tags | advisory
advisories | CVE-2012-4964
MD5 | 06d662bd3bee2e71101cd304f18f0ada

Samsung Printer Backdoor

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Overview

Samsung printers contain a hardcoded account that could allow a remote attacker to take control of an affected device.
Description

Samsung printers (as well as some Dell printers manufactured by Samsung) contain a hardcoded SNMP full read-write community string that remains active even when SNMP is disabled in the printer management utility.
Impact

A remote, unauthenticated attacker could access an affected device with administrative privileges. Secondary impacts include: the ability to make changes to the device configuration, access to sensitive information (e.g., device and network information, credentials, and information passed to the printer), and the ability to leverage further attacks through arbitrary code execution.
Solution

Samsung has stated that models released after October 31, 2012 are not affected by this vulnerability. Samsung has also indicated that they will be releasing a patch tool later this year to address vulnerable devices.

Restrict Access

As a general good security practice, only allow connections from trusted hosts and networks. Restricting access would prevent an attacker from accessing an SNMP interface using the affected credentials from a blocked network location.


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