CVE-2020-35488 : Security Advisory and Response

The fileop module of the NXLog service in NXLog Community Edition 2.10.2150 is vulnerable to a denial of service attack through a crafted Syslog payload.

Understanding CVE-2020-35488

This CVE identifies a vulnerability in the NXLog Community Edition that can be exploited remotely to crash the daemon service.

What is CVE-2020-35488?

The vulnerability in the fileop module of NXLog Community Edition 2.10.2150 allows attackers to trigger a denial of service by sending a specially crafted Syslog payload to the Syslog service. Successful exploitation requires a specific configuration, and the directory name created must utilize a Syslog field.

The Impact of CVE-2020-35488

The vulnerability can lead to a denial of service, causing the NXLog service to crash, disrupting logging and potentially affecting system availability.

Technical Details of CVE-2020-35488

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The issue resides in the fileop module of NXLog Community Edition 2.10.2150.
Attackers can exploit the vulnerability by sending a malicious Syslog payload.

Affected Systems and Versions

NXLog Community Edition 2.10.2150 is affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a specifically crafted Syslog payload to the Syslog service.
Successful exploitation requires a particular configuration and the use of a Syslog field in the directory name.

Mitigation and Prevention

To address CVE-2020-35488, consider the following steps:

Immediate Steps to Take

Update NXLog Community Edition to a patched version.
Implement network-level protections to filter out potentially malicious Syslog payloads.

Long-Term Security Practices

Regularly monitor and audit Syslog data for anomalies.
Follow security best practices for configuring and securing logging services.

Patching and Updates

Apply patches provided by NXLog to address the vulnerability.