CVE-2019-7323 in LogMX
Summary
by MITRE
GUP (generic update process) in LightySoft LogMX before 7.4.0 does not properly verify the authenticity of updates, which allows man-in-the-middle attackers to execute arbitrary code via a Trojan horse update. The update process relies on cleartext HTTP. The attacker could replace the LogMXUpdater.class file.
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Analysis
by VulDB Data Team • 07/04/2023
The vulnerability identified as CVE-2019-7323 affects the generic update process within LightySoft LogMX software prior to version 7.4.0, representing a critical security flaw that undermines the integrity of the application's update mechanism. This weakness stems from the absence of proper authenticity verification during the update process, creating a pathway for malicious actors to compromise the system through man-in-the-middle attacks. The vulnerability specifically targets the update infrastructure that relies on cleartext HTTP communications, making it susceptible to interception and modification by attackers who can seamlessly replace legitimate update components with malicious payloads.
The technical implementation of this vulnerability lies in the insecure update mechanism that fails to validate digital signatures or implement cryptographic verification of update files. When the LogMX application attempts to download updates, it does so over unencrypted HTTP connections, allowing attackers to intercept and manipulate the communication stream. The attacker can specifically target and replace the LogMXUpdater.class file, which serves as a critical component in the update process, with a malicious version that executes arbitrary code on the victim's system. This flaw directly relates to CWE-319, which addresses the exposure of sensitive information via cleartext transmission, and represents a classic example of insecure communication protocols enabling privilege escalation through update tampering.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a persistent backdoor mechanism within the target environment. Once the malicious LogMXUpdater.class file is successfully installed, the attacker gains the ability to execute arbitrary commands with the privileges of the LogMX application, potentially leading to complete system compromise. The vulnerability affects all versions of LogMX prior to 7.4.0, making it a widespread concern for organizations that have not yet upgraded their systems. The attack vector is particularly concerning because it can be executed without requiring user interaction or specific system vulnerabilities, as the update process occurs automatically and the attacker only needs to intercept the network traffic between the application and its update servers.
Mitigation strategies for this vulnerability require immediate implementation of secure update mechanisms that enforce cryptographic verification of all update components. Organizations should upgrade to LogMX version 7.4.0 or later, which addresses this vulnerability through the implementation of secure HTTPS communications and digital signature verification. The fix typically involves transitioning from cleartext HTTP to encrypted HTTPS connections and implementing proper certificate validation to ensure update authenticity. Additionally, network administrators should consider implementing network monitoring solutions to detect anomalous update traffic patterns and establish secure update policies that prevent automatic updates from untrusted sources. This vulnerability aligns with ATT&CK technique T1068, which covers local privilege escalation through legitimate system tools, and demonstrates how insecure update mechanisms can provide attackers with persistent access to compromised systems. The remediation process should also include verifying the integrity of existing installations and ensuring that no malicious update files have already been installed on affected systems.