## Critical Apache Log4j 2.x Vulnerability CVE-2017-5645 Exposes Systems to Remote Code Execution
A critical, high-severity vulnerability in Apache Log4j 2.x has been flagged, posing a severe remote code execution risk to applications using the library's socket servers. Identified as CVE-2017-5645, this flaw carries a CVSS score of 9.8, indicating its potential for widespread exploitation. The vulnerability specifically affects versions prior to 2.8.2, where the TCP or UDP socket server components are used to receive serialized log events.

The core of the exploit lies in the deserialization process. A malicious actor can send a specially crafted binary payload to a vulnerable Log4j socket server. When this payload is deserialized, it can trigger the execution of arbitrary code on the host system, granting the attacker potential control. This makes any application relying on these specific Log4j features for log aggregation or centralized logging a prime target. The vulnerable library in this instance is `log4j-core-2.6.1.jar`, a version definitively within the affected range.

This vulnerability underscores a persistent threat in software supply chains: the use of outdated, vulnerable logging libraries. While this CVE was published in 2017, its detection in current dependency scans signals that legacy systems or unpatched applications remain exposed. The immediate and only effective remediation is to upgrade the Log4j dependency to version 2.8.2 or later. Organizations must audit their software inventories, particularly applications with external network interfaces using Log4j's socket appenders, to mitigate this critical remote attack vector.
---
- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: CVE-2017-5645, Apache Log4j, Remote Code Execution, Vulnerability, Software Supply Chain
- **Credibility**: unverified
- **Published**: 2026-04-07 09:27:01
- **ID**: 52749
- **URL**: https://whisperx.ai/en/intel/52749