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8.8
CVSSv3

CVE-2021-37748

Published: 28/10/2021 Updated: 03/11/2021
CVSS v2 Base Score: 9 | Impact Score: 10 | Exploitability Score: 8
CVSS v3 Base Score: 8.8 | Impact Score: 5.9 | Exploitability Score: 2.8
VMScore: 801
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C
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Vulnerability Summary

Multiple buffer overflows in the limited configuration shell (/sbin/gs_config) on Grandstream HT801 devices prior to 1.0.29 allow remote authenticated users to execute arbitrary code as root via a crafted manage_if 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.

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grandstream ht801_firmware

Github Repositories

https://github.com/SECFORCE/CVE-2021-37748

Exploits for the CVE-2021-37748 Full writeup: wwwsecforcecom/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/

References

CWE-787http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/https://github.com/SECFORCE/CVE-2021-37748https://nvd.nist.govhttps://github.com/SECFORCE/CVE-2021-37748
CVSSv3
CVSSv2
CVSSv3
VMScore
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