CVE-2018-1000823 : Security Advisory and Response

Exist version 5.0.0-RC4 and below contain a vulnerability related to XML External Entity (XXE) in the XML Parser for REST Server, leading to security risks like information disclosure, denial of service, SSRF, and port scanning.

Understanding CVE-2018-1000823

This CVE involves a vulnerability in the XML Parser for REST Server in exist version 5.0.0-RC4 and earlier, allowing for potential exploitation.

What is CVE-2018-1000823?

The version 5.0.0-RC4 and below of exist have a vulnerability related to XML External Entity (XXE) in the XML Parser for REST Server. This vulnerability can result in various security concerns such as disclosure of sensitive information, denial of service, SSRF, and port scanning.

The Impact of CVE-2018-1000823

The vulnerability can lead to serious consequences, including:

Disclosure of sensitive information
Denial of service attacks
Server-Side Request Forgery (SSRF)
Port scanning

Technical Details of CVE-2018-1000823

Exist version 5.0.0-RC4 and below are affected by this vulnerability.

Vulnerability Description

The vulnerability is related to XML External Entity (XXE) in the XML Parser for REST Server.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions affected: 5.0.0-RC4 and below

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to perform various attacks, including information disclosure, denial of service, SSRF, and port scanning.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-1000823.

Immediate Steps to Take

Update exist to a version that addresses the XXE vulnerability
Implement network security measures to prevent unauthorized access

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities
Conduct security assessments and audits to identify and mitigate risks

Patching and Updates

Apply patches and updates provided by the software vendor to fix the XXE vulnerability