CVE-2026-53791

Publié : 13 août 2026

Modifié : 13 août 2026

Score CVSS

9.1

CRITICAL

Description détaillée

rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.

Vecteur d'attaque (CVSS)

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

Références et Patchs

https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 https://github.com/RsyncProject/rsync/security/advisories/GHSA-h2q9-5fr8-w635 https://www.vulncheck.com/advisories/rsync-daemon-ip-spoofing-via-proxy-protocol-header

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