CVE-2021-44954 : Exploit Details and Defense Strategies

In QVIS NVR DVR before 2021-12-13, an attacker can escalate privileges from a qvisdvr user to the root user by abusing a Sudo misconfiguration.

Understanding CVE-2021-44954

In QVIS NVR DVR, a vulnerability exists that allows an attacker to elevate privileges and obtain root user access through a Sudo misconfiguration.

What is CVE-2021-44954?

CVE-2021-44954 is a privilege escalation vulnerability in QVIS NVR DVR, enabling an unauthorized user to gain elevated access rights to perform unauthorized actions.

The Impact of CVE-2021-44954

The exploitation of this vulnerability can lead to unauthorized access and control over the system, allowing attackers to perform malicious activities and compromise system integrity.

Technical Details of CVE-2021-44954

The technical details of the CVE-2021-44954 vulnerability are as follows:

Vulnerability Description

An attacker can exploit a Sudo misconfiguration in QVIS NVR DVR to escalate privileges from a qvisdvr user to the root user.

Affected Systems and Versions

Product: QVIS NVR DVR
Vendor: N/A
Versions affected: All versions before 2021-12-13

Exploitation Mechanism

The attacker abuses a Sudo misconfiguration to gain unauthorized access and escalate privileges from a regular user to the root user.

Mitigation and Prevention

To mitigate the CVE-2021-44954 vulnerability, follow these steps:

Immediate Steps to Take

Update QVIS NVR DVR to the latest version that includes a fix for the Sudo misconfiguration.
Monitor system logs for any suspicious activities indicating privilege escalation attempts.

Long-Term Security Practices

Regularly review and adjust Sudo configurations to prevent privilege escalation attacks.
Implement least privilege principles to restrict unnecessary access rights.

Patching and Updates

Apply security patches promptly to safeguard against known vulnerabilities and address any misconfigurations.