Buffer overflow in Grandstream Ht801
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.074 (94.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.074 · newest: 0.074 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/produc… (Product, Vendor Advisory)
- www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-… (Exploit, Third Party Advisory)
- github.com/SECFORCE/CVE-2021-37748 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-37748?
- CVE-2021-37748 is a high-severity vulnerability in Grandstream Ht801, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-10-28.
- How severe is CVE-2021-37748?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-37748 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.