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AUSCERT External Security Bulletin Redistribution
Vulnerability Note VU#281284 Samsung Printer firmware
contains a backdoor administrator account
29 November 2012
AusCERT Security Bulletin Summary
Product: Samsung and Dell Printers
Operating System: Printer
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
CVE Names: CVE-2012-4964
Comment: While Samsung and Dell have not yet released updates for exisiting
affected models, they have stated that they will be releasing a patch
tool later this year to address vulnerable devices. To mitigate this
issue, AusCERT recommends that administrators restrict access by only
allowing connections from trusted hosts and networks.
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Vulnerability Note VU#281284
Samsung Printer firmware contains a backdoor administrator account
Original Release date: 26 Nov 2012 | Last revised: 28 Nov 2012
Samsung printers contain a hardcoded account that could allow a remote
attacker to take control of an affected device.
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.
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
Samsung and Dell have stated that models released after October 31, 2012 are
not affected by this vulnerability. Samsung and Dell have also indicated that
they will be releasing a patch tool later this year to address vulnerable
Block Port 1118/udp
The reporter has stated that blocking the custom SNMP trap port of 1118/udp
will help mitigate the risks.
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.
Vendor Information (Learn More)
Vendor Status Date Notified Date Updated
Dell Computer Corporation, Inc. Affected 23 Aug 2012 28 Nov 2012
Samsung Affected 23 Aug 2012 26 Nov 2012
If you are a vendor and your product is affected, let us know.
CVSS Metrics (Learn More)
Group Score Vector
Base 9.0 AV:N/AC:M/Au:N/C:C/I:C/A:P
Temporal 6.5 E:U/RL:W/RC:UC
Environmental 1.9 CDP:LM/TD:L/CR:ND/IR:ND/AR:ND
Thanks to Neil Smith for reporting this vulnerability
This document was written by Katie Steiner
CVE IDs: CVE-2012-4964
Date Public: 26 Nov 2012
Date First Published: 26 Nov 2012
Date Last Updated: 28 Nov 2012
Document Revision: 30
If you have feedback, comments, or additional information about this
vulnerability, please send us email.
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