Security Advisory

CVE-2026-43617

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-20 00:52:38

Last updated 2026-07-14 20:01:04

Assigner VulnCheck

CVSS score 6.3

State PUBLISHED

Description

Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing connections from hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.

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