CVE-2019-1765 : What You Need to Know

A vulnerability in the web-based management interface of Cisco IP Phone 8800 Series SIP Software allows a remote attacker to write arbitrary files onto the filesystem.

Understanding CVE-2019-1765

This CVE involves a path traversal vulnerability in Cisco IP Phone 8800 Series.

What is CVE-2019-1765?

The vulnerability allows an authenticated attacker to upload invalid files, potentially leading to writing files in any location on the filesystem.

The Impact of CVE-2019-1765

CVSS Base Score: 8.1 (High Severity)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
Confidentiality Impact: None
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2019-1765

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw arises from inadequate input validation and file permissions in the web-based management interface of Cisco IP Phone 8800 Series SIP Software.

Affected Systems and Versions

Cisco Wireless IP Phone 8821 and 8821-EX running SIP Software version less than 11.0(5)
Cisco IP Conference Phone 8832 and other IP Phone 8800 Series versions running SIP Software version less than 12.5(1)SR1

Exploitation Mechanism

An attacker with authenticated access can exploit the vulnerability by uploading malicious files to the targeted device, allowing them to write files in any desired location on the filesystem.

Mitigation and Prevention

Protect your systems from CVE-2019-1765 with the following steps:

Immediate Steps to Take

Apply vendor-provided patches promptly
Monitor network traffic for any signs of exploitation
Restrict access to the web-based management interface

Long-Term Security Practices

Regularly update and patch all software and firmware
Conduct security training for employees to recognize and report suspicious activities

Patching and Updates

Cisco has released patches to address the vulnerability
Ensure all affected systems are updated with the latest security fixes