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Vulnerabilities / Threats

US-CERT: Samsung Printer Firmware Contains Backdoor

Samsung printers contain a hard-coded account that could allow a remote attacker to take control

Samsung printers manufactured before October of this year contain a backdoor account that could allow hackers to take control of them remotely, a researcher reported to US-CERT this week.

According to a vulnerability report made to US-CERT by researcher Neil Smith, Samsung printers -- as well as some Dell printers manufactured by Samsung -- contain a "hard-coded SNMP full read-write community string that remains active even when SNMP is disabled in the printer management utility."

The Simple Network Management Protocol (SNMP) is used to monitor the status of remote devices.

Using this backdoor account, a remote, unauthenticated attacker could access an affected device with administrative privileges, according to US-CERT. Such access could enable an attacker to make changes to the device configuration, gain access to sensitive information -- such as device and network information, credentials, and information passed to the printer -- and execute further attacks through arbitrary code.

Samsung and Dell have stated that models released after Oct. 31, 2012, are not affected by this vulnerability. Both companies said they will be releasing a patch tool later this year to address vulnerable devices.

Smith suggested that blocking the custom SNMP trap port of 1118/udp will help mitigate the risks posed by the backdoor.

Have a comment on this story? Please click "Add a Comment" below. If you'd like to contact Dark Reading's editors directly, send us a message. Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

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jsargeant
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jsargeant,
User Rank: Apprentice
10/15/2019 | 1:11:22 AM
firmware issue
This blog is certainly very good information to gather, I have a Samsung and a Lexmark printer , however I was really concerned about the firmware issues, however from this blog I am clear about the Samsung printer, but the Lexmark printer is still showing an unusual error called [url=https://printerssupport.co/fix-lexmark-900-firmware-error/]lexmark 900 firmware error[/url], any solution regarding this issue will be appreciated as I have tried reinstalling the drivers and the software for the firmware error to get solved.
Why Vulnerable Code Is Shipped Knowingly
Chris Eng, Chief Research Officer, Veracode,  11/30/2020
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