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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1118 Vulnerability Note VU#281284 Samsung Printer firmware contains a backdoor administrator account 29 November 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Samsung and Dell Printers Publisher: US-CERT Operating System: Printer Impact/Access: Administrator Compromise -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2012-4964 Original Bulletin: http://www.kb.cert.org/vuls/id/281284 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. - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Note VU#281284 Samsung Printer firmware contains a backdoor administrator account Original Release date: 26 Nov 2012 | Last revised: 28 Nov 2012 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 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 devices. Block Port 1118/udp The reporter has stated that blocking the custom SNMP trap port of 1118/udp will help mitigate the risks. 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. 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 References * None Credit Thanks to Neil Smith for reporting this vulnerability This document was written by Katie Steiner Other Information 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 Feedback If you have feedback, comments, or additional information about this vulnerability, please send us email. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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