Linksys announces firmware fix to neutralize "The Moon" worm
Posted on 18.02.2014
As Linksys (i.e. parent company Belkin) announced they were aware of "TheMoon" malware targeting its older routers and that they are working on a firmware fix, more details about the worm in question have been shared by researchers.

"The worm will connect first to port 8080, and if necessary using SSL, to request the '/HNAP1/' URL. This will return an XML formatted list of router features and firmware versions. The worm appears to extract the router hardware version and the firmware revision," shared SANS instructor and ISC researcher Johannes Ullrich.

"Next, the worm will send an exploit to a vulnerable CGI script running on these routers. The request does not require authentication. The worm sends random 'admin' credentials but they are not checked by the script.

The worm comes in the form of a 2MB ELF MIPS binary, and once a router is infected, it scans for other victims on different networks, and serves the malware at a random low port for new victims to download.

"We call this a 'worm' at this point, as all it appears to do is spread. This may be a 'bot' if there is a functional command and control channel present," Ullrich concluded.

The vulnerability exploited is in the implementation of the Home Network Administration Protocol (HNAP), and apparently is present in the following series of Linksys routers: E4200, E3200, E3000, E2500, E2100L, E2000, E1550, E1500, E1200, E1000, E900. But it also depends on the devices' firmware version.

Also, someone who goes by the online handle "Rew" has apparently published proof-of-concept attack code for the exploitation of the vulnerability, and claims that the list of vulnerable devices is even longer.

Administrators and users are advised to Disable Remote Administration of their device, which protects them from the attack.


DMARC: The time is right for email authentication

Posted on 23 January 2015.  |  The DMARC specification has emerged in the last couple years to pull together all the threads of email authentication technology under one roof—to standardize the method in which email is authenticated, and the manner in which reporting and policy enforcement is implemented.

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