Overview

This report provides a detailed analysis of the CVE-2024-47619 vulnerability. The vulnerability exists in syslog-ng, an enhanced log daemon, and it affects versions prior to 4.8.2. The vulnerability has an impact on TLS connections and may expose systems to potential man-in-the-middle attacks, thereby leading to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2024-47619
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Possible system compromise and data leakage

Affected Products

Product | Affected Versions

syslog-ng | versions prior to 4.8.2

How the Exploit Works

The vulnerability is a result of the `tls_wildcard_match()` function in syslog-ng matching certificates such as `foo.*.bar`, which should not be allowed. It is also possible to pass partial wildcards such as `foo.a*c.bar` which glib matches but should be avoided or invalidated. This flaw can be exploited in a malicious man-in-the-middle attack where an attacker can present a certificate that should not match but does due to this bug, thereby intercepting secure TLS communications.

Conceptual Example Code

Here is a conceptual example of how this vulnerability might be exploited. This is a pseudocode representation and is not intended to be executed.

// Obtain a certificate that should not match but does due to the vulnerability
certificate = get_certificate("foo.*.bar")
// Setup a man-in-the-middle attack
setup_mitm_attack(certificate)
// Intercept and possibly modify secure TLS communications
intercept_communication()

The mitigation for this vulnerability is to apply the vendor patch or use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation. In the long term, upgrading to syslog-ng version 4.8.2 or later, which contains a fix for this issue, is highly recommended.