CVE-2022-25217 : Vulnerability Insights and Analysis
Discover the impact and technical details of CVE-2022-25217, a critical vulnerability in Phicomm Routers allowing unauthorized root access through telnet. Learn how to mitigate and prevent exploitation.
A vulnerability has been identified in Phicomm Routers that allows an attacker to obtain root shell access through telnet. This CVE, assigned as CVE-2022-25217, poses a serious security risk to affected devices.
Understanding CVE-2022-25217
This section delves into the details of the CVE-2022-25217 vulnerability found in Phicomm Routers.
What is CVE-2022-25217?
The vulnerability involves the use of a hard-coded cryptographic key pair by the telnetd_startup service, enabling an attacker on the local network to gain a root shell on the device through telnet.
The Impact of CVE-2022-25217
The exploitation of this vulnerability allows unauthorized access to the device, potentially leading to complete control over the affected Phicomm Routers.
Technical Details of CVE-2022-25217
In this section, we explore the technical aspects of CVE-2022-25217.
Vulnerability Description
The telnetd_startup service includes both private and public RSA keys in specific firmware versions, allowing an attacker to spawn an unauthenticated telnet shell as root.
Affected Systems and Versions
Phicomm Routers with firmware versions K2 22.5.9.163, K3 21.5.37.246, K3C 32.1.15.93 -- 32.1.26.175, K3C 33.1.25.177, K2P 20.4.1.7, and K2 A7 22.6.506.28 are known to be affected by this vulnerability.
Exploitation Mechanism
Attackers can obtain the leaked private key and use scripted UDP packets to instruct telnetd_startup to spawn an unauthenticated telnet shell as root, leading to complete device compromise.
Mitigation and Prevention
Learn about the steps to mitigate and prevent the CVE-2022-25217 vulnerability.
Immediate Steps to Take
It is crucial to apply security patches and firmware updates provided by Phicomm to address this vulnerability promptly.
Long-Term Security Practices
Implement network segmentation, strong passwords, and regular security audits to enhance the overall security posture of the network.
Patching and Updates
Stay informed about firmware updates and security advisories from Phicomm to protect against known vulnerabilities.