CyberRota Analysis
AI-GeneratedApache ZooKeeper versions 3.9.0 to 3.9.5 and 3.8.0 to 3.8.6 are vulnerable to an unauthenticated log injection attack, allowing attackers to insert arbitrary log entries by exploiting the add_auth request with newline characters. This could lead to misleading log information that obscures genuine operational events, potentially hindering incident response and security monitoring. Organizations using affected versions should prioritize upgrading to 3.8.7 or 3.9.6 to mitigate this risk.
Original NVD Description
An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble", ...) request containing newline characters (\n). When the ensemble name doesn't match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J's {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output. This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6. Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.
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