CVE-2021-27177 Auth bypass in n/a

Critical 9.8 Published Updated

Attackers can bypass authentication on FiberHome HG6245D devices by sending a specific string to the telnet server, gaining unauthorized access.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2021-27177?

CVE-2021-27177 is a critical authentication bypass vulnerability in n/a, published on 10 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.

Weakness: CWE-863

Which versions are affected by CVE-2021-27177?

It affects 1 product.

Products include Fiberhome Hg6245d Firmware.

How do I fix CVE-2021-27177?

No fix has been published for CVE-2021-27177 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-27177 being exploited?

There is no known exploitation of CVE-2021-27177 in the wild and no public exploit code.

Sources

Also known as GHSA-vg7p-2967-p5p3.

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