CVE-2021-37748

Multiple buffer overflows in the limited configuration shell (/sbin/gs_config) on Grandstream HT801 devices before 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 93%
VendorProductVersion
grandstreamht801_firmware
𝑥
< 1.0.29
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
https://github.com/SECFORCE/CVE-2021-37748
https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/
http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
https://github.com/SECFORCE/CVE-2021-37748
https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/