CVE-2022-1039 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2022-1039, a critical vulnerability affecting Red Lion's DA50N series product.

Understanding CVE-2022-1039

CVE-2022-1039 is a vulnerability that allows attackers to exploit weak passwords on the web user interface and Linux accounts, potentially leading to unauthorized access and privilege escalation.

What is CVE-2022-1039?

The weakness in passwords on the web user interface and Linux accounts can be abused via HTTP/HTTPS and SSH/Telnet, respectively. Attackers could change passwords and gain root access using default passwords.

The Impact of CVE-2022-1039

With a CVSS base score of 9.6, this critical vulnerability poses a high risk to confidentiality, integrity, and availability. Attackers can exploit it remotely without privileges, requiring user interaction.

Technical Details of CVE-2022-1039

Vulnerability Description

The vulnerability arises from weak passwords on the web user interface and Linux accounts, allowing unauthorized access and potential privilege escalation.

Affected Systems and Versions

Red Lion's DA50N series product is affected, with all versions susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit the weak passwords via HTTP/HTTPS on the web user interface and SSH/Telnet for Linux accounts, potentially changing passwords and escalating privileges.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to apply the following immediate steps:

Avoid installing image files from unofficial sources
Verify server TLS certificates when downloading
Securely store package files or images
Restrict physical access to the device
Change default UI passwords
Update admin, rlcuser, and techsup passwords
Disable unnecessary services like SSH and Telnet
Avoid password reuse and limit access to sensitive files

Long-Term Security Practices

Ensure the use of secure credentials for configurations and limit optional service usage to the essentials for the application.

Patching and Updates

Red Lion states that DA50N is end-of-life and won't release a software update. Users are encouraged to apply workarounds, mitigate risks, or upgrade to the DA50A or DA70A devices.