CVE-2026-43617

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

4.8 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS 4.0

6.3 (MEDIUM) מקור הציון: CNA CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-1/10/2026

CWE

CWE-289

מוצרים מושפעים

samba: rsync

קישורים

• https://github.com/RsyncProject/rsync/security/advisories/GHSA-rjfm-3w2m-jf4f Vendor Advisory
• https://github.com/RsyncProject/rsync/releases/tag/v3.4.3 Release Notes
• https://www.vulncheck.com/advisories/rsync-authorization-bypass-via-hostname-r‮… Third Party Advisory