Buffer Overflow Vulnerability in Grandstream HT801 Device Configuration Shell
CVE-2021-37748

8.8HIGH

Key Information:

Vendor

Grandstream

Status
Ht801 Firmware
Vendor
CVE Published:
28 October 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 11%

What is CVE-2021-37748?

Multiple buffer overflow vulnerabilities exist in the limited configuration shell of Grandstream HT801 devices before version 1.0.29. These vulnerabilities can be exploited by remote authenticated users, allowing them to execute arbitrary code with root privileges by manipulating the manage_if setting. This exploitation bypasses the intended restrictions of the shell, granting full control over the device. Additionally, the presence of default weak credentials further facilitates unauthorized access, posing a significant risk to device integrity and security.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-37748
Created by SECFORCE

References

http://www.grandstream.com/products/gateways-and-atas/ana...
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https://www.secforce.com/blog/exploiting-grandstream-ht80...
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https://github.com/SECFORCE/CVE-2021-37748
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EPSS Score

11% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

.