CVE-2019-1648 : Security Advisory and Response

A vulnerability in the user group configuration of the Cisco SD-WAN Solution could allow an authenticated, local attacker to gain elevated privileges on an affected device. The attacker could exploit this weakness to obtain higher privileges on the device, leading to root-level access and complete control.

Understanding CVE-2019-1648

This CVE involves a privilege escalation vulnerability in the Cisco SD-WAN Solution.

What is CVE-2019-1648?

The vulnerability arises from inadequate verification of specific parameters in the user group configuration, enabling an attacker to write a custom file to the directory where the configuration is stored, ultimately granting root-level access and full control over the device.

The Impact of CVE-2019-1648

The vulnerability has a CVSS base score of 7.8, indicating a high severity level. It poses a significant risk as it allows attackers to escalate privileges and compromise the affected device's confidentiality, integrity, and availability.

Technical Details of CVE-2019-1648

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from a flaw in the user group configuration of the Cisco SD-WAN Solution, which fails to properly validate certain parameters, enabling attackers to exploit this weakness for privilege escalation.

Affected Systems and Versions

Product: Cisco SD-WAN Solution
Vendor: Cisco
Versions: Not applicable (n/a)

Exploitation Mechanism

Attacker needs to write a custom file to the directory where the user group configuration is stored
Successful exploitation grants root-level privileges and complete control over the device

Mitigation and Prevention

Protecting systems from CVE-2019-1648 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly
Monitor system logs for any suspicious activities
Restrict access to critical directories and files

Long-Term Security Practices

Regularly update and patch all software and firmware
Implement the principle of least privilege to restrict user access
Conduct regular security audits and penetration testing

Patching and Updates

Cisco has released security advisories addressing this vulnerability
Ensure all relevant patches are applied to mitigate the risk of exploitation