PT-2021-13796 · Unknown · Gryphon Tower Router

Published 2021-12-09 · Updated 2021-12-13 · CVE-2021-20139

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Gryphon Tower routers (affected versions not specified)

Description: An unauthenticated command injection issue exists in the parameters of operation 3 in the controller server service. An unauthenticated remote attacker on the same network can execute commands as root on the device by sending a specially crafted malicious packet to the controller server service on port 9999, specifically the "controller server" service.

Recommendations: As a temporary workaround, consider restricting access to the controller server service on port 9999 to minimize the risk of exploitation. Avoid using the vulnerable parameters in operation 3 of the controller server service until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2021-20139

Affected Products

Gryphon Tower Router

References · 4

• 🔥 https://tenable.com/security/research/tra-2021-51 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-20139 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20139 · Vendor Advisory
• https://t.me/cibsecurity/33691 · Telegram Post