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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.41% probability · 94th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- grandstream/ht801 firmware
- Source
- cve@mitre.org
References
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801Product, Vendor Advisory
- https://github.com/SECFORCE/CVE-2021-37748Third Party Advisory
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/Exploit, Third Party Advisory
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801Product, Vendor Advisory
- https://github.com/SECFORCE/CVE-2021-37748Third Party Advisory
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.