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CVE-2026-43617

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CVE-2026-43617

Published: May 20, 2026

Modified: May 20, 2026

PUBLISHED

CVSS v3.1

4.8

MEDIUM

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.

VendorProductVersions

RsyncProject

rsync

affected
0 - < 3.4.3

Weaknesses (CWE)

CWE-289

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

References

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