CVE-2021-37748: Buffer Overflow
Multiple buffer overflows in the limited configuration shell (/sbin/gsconfig) on Grandstream HT801 devices before 1.0.29 allow remote authenticated users to execute arbitrary code as root via a crafted manageif setting, thus bypassing the intended restrictions of this shell and taking full control of the device. There are default weak credentials that can be used to authenticate.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-37748?
CVE-2021-37748 is a vulnerability that allows remote authenticated users to execute arbitrary code as root on Grandstream HT801 devices before 1.0.29, bypassing the intended restrictions of the limited configuration shell (/sbin/gs_config).
How severe is CVE-2021-37748?
CVE-2021-37748 has a severity rating of 8.8, which is considered critical.
What is the affected software for CVE-2021-37748?
Grandstream HT801 devices before version 1.0.29 are affected by CVE-2021-37748.
How can remote authenticated users exploit CVE-2021-37748?
Remote authenticated users can exploit CVE-2021-37748 by crafting a manage_if setting to execute arbitrary code as root on Grandstream HT801 devices.
Are all Grandstream HT801 devices vulnerable to CVE-2021-37748?
No, only Grandstream HT801 devices before version 1.0.29 are vulnerable to CVE-2021-37748.