Microsoft Discloses Essential Bugs Permitting Takeover of NETGEAR Routers



Cybersecurity researchers have detailed crucial safety vulnerabilities affecting NETGEAR DGN2200v1 series routers, which they are saying might be reliably abused as a jumping-off level to compromise a community’s safety and acquire unfettered entry.

The three HTTPd authentication safety weaknesses (CVSS scores: 7.1 – 9.4) affect routers working firmware variations previous to v1.0.0.60, and have since been fixed by the company in December 2020 as a part of a coordinated vulnerability disclosure course of.

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“The rising variety of firmware assaults and ransomware assaults through VPN gadgets and different internet-facing methods are examples of assaults initiated exterior and under the working system layer,” Microsoft 365 Defender Analysis Crew’s Jonathan Bar Or said. “As a lot of these assaults turn out to be extra widespread, customers should look to safe even the single-purpose software program that run their {hardware}—like routers.”


In a nutshell, the failings permit accessing router administration pages utilizing an authentication bypass, enabling an attacker to achieve full management over the router, in addition to derive saved router credentials through a cryptographic side-channel assault, and even get well the username and the password saved within the router’s reminiscence by exploiting the configuration backuprestore function.

Enterprise Password Management

“The username and the password are in contrast [against the saved credentials] utilizing strcmp,” Bar Or defined. “The libc implementation of strcmp works by evaluating character-by-character till a NUL terminator is noticed or till a mismatch occurs. An attacker might reap the benefits of the latter by measuring the time it takes to get a failure.”


Moreover, by abusing the aforementioned authentication bypass to fetch the configuration file, the researchers discovered that the credentials had been encrypted utilizing a relentless key, which might be subsequently used to retrieve the plaintext password and the person title.

NETGEAR DGN2200v1 customers are advisable to obtain and replace to the most recent firmware to fend off any potential assaults.


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