CVE-2020-26064 : Exploit Details and Defense Strategies

A vulnerability in the web UI of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to gain read and write access to information stored on an affected system.

Understanding CVE-2020-26064

This CVE identifies a security flaw in Cisco SD-WAN vManage Software that could be exploited by an attacker to access sensitive data.

What is CVE-2020-26064?

The vulnerability in Cisco SD-WAN vManage Software arises from improper handling of XML External Entity (XXE) entries when parsing specific XML files. An attacker can exploit this by tricking a user into importing a malicious XML file, potentially leading to unauthorized access.

The Impact of CVE-2020-26064

If successfully exploited, this vulnerability could enable an attacker to read and write files within the affected application, compromising the confidentiality of stored information.

Technical Details of CVE-2020-26064

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in Cisco SD-WAN vManage Software allows an authenticated remote attacker to gain unauthorized access to sensitive information by manipulating XML files.

Affected Systems and Versions

Vendor: Cisco
Product: Cisco SD-WAN vManage
Affected Versions: Multiple versions ranging from 17.2.6 to 20.3.1

Exploitation Mechanism

The vulnerability is exploited by persuading a user to import a crafted XML file containing malicious entries, which triggers unauthorized access to the system.

Mitigation and Prevention

Protecting systems from CVE-2020-26064 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches promptly
Monitor for any unauthorized access or file modifications
Educate users on safe file handling practices

Long-Term Security Practices

Regular security training for employees
Implement network segmentation to limit access
Use intrusion detection systems to identify suspicious activities

Patching and Updates

Cisco has released patches to address this vulnerability
Regularly update software and security patches to prevent exploitation