CVE-2019-10655 : What You Need to Know

Grandstream devices GAC2500, GXP2200, GVC3202, GXV3275, and GXV3240 are vulnerable to unauthorized remote code execution due to a flaw in the /manager?action=getlogcat parameter.

Understanding CVE-2019-10655

This CVE identifies a critical vulnerability in Grandstream devices that can be exploited for remote code execution.

What is CVE-2019-10655?

The vulnerability allows attackers to execute remote code by manipulating the priority field of the /manager?action=getlogcat parameter.

The Impact of CVE-2019-10655

Unauthorized remote code execution on affected Grandstream devices
Bypassing authentication through buffer overflow and cookie manipulation
Potential for remote exploitation and CSRF attacks

Technical Details of CVE-2019-10655

Grandstream devices are susceptible to unauthorized remote code execution due to a specific parameter vulnerability.

Vulnerability Description

Exploitable flaw in the priority field of the /manager?action=getlogcat parameter
Buffer overflow using the phonecookie cookie to bypass authentication
Remote code execution through manipulation of data structure

Affected Systems and Versions

Grandstream GAC2500 1.0.3.35
GXP2200 1.0.3.27
GVC3202 1.0.3.51
GXV3275 before 1.0.3.219 Beta
GXV3240 before 1.0.3.219 Beta

Exploitation Mechanism

Utilizing specific characters in the priority field
Buffer overflow via the phonecookie cookie
Overwriting data structure to bypass authentication
Remote exploitation and CSRF attacks

Mitigation and Prevention

Immediate Steps to Take:

Apply vendor-supplied patches or updates
Restrict network access to vulnerable devices
Monitor network traffic for suspicious activity

Long-Term Security Practices:

Regularly update firmware and software
Conduct security assessments and audits
Implement network segmentation and access controls

Patching and Updates:

Check for security advisories from Grandstream
Apply recommended patches promptly