{"id":56872,"date":"2026-11-06T08:36:00","date_gmt":"2026-11-06T07:36:00","guid":{"rendered":"https:\/\/www.chinasmartbuy.com\/blog\/?p=56872"},"modified":"2026-11-06T02:59:34","modified_gmt":"2026-11-06T01:59:34","slug":"alpine-linux-falla-ssh-accesso-senza-password-patch","status":"publish","type":"post","link":"https:\/\/www.chinasmartbuy.com\/blog\/alpine-linux-falla-ssh-accesso-senza-password-patch\/","title":{"rendered":"Alpine Linux, falla SSH permette accessi senza password: disponibili le patch"},"content":{"rendered":"\n<style>\n.fbp5-wrap{max-width:860px;margin:0 auto;color:#242424;font:17px\/1.75 system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",sans-serif;padding:0 20px;box-sizing:border-box}.fbp5-wrap p{margin:0 0 18px}.fbp5-wrap h2{font-size:26px;line-height:1.3;margin:34px 0 17px}.fbp5-wrap figure{margin:24px 0}.fbp5-wrap figure img{display:block;width:100%;height:auto;border-radius:12px}.fbp5-wrap figcaption{font-size:12px;line-height:1.6;color:#666;margin-top:8px}.rh-attribution-pills{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0!important}.rh-attribution-pills a{display:inline-block;border:1px solid #ead3d3;border-radius:24px;padding:6px 14px;color:#a81925;text-decoration:none;font-size:13px}.csb-related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.csb-related-card{text-decoration:none!important;color:#242424;display:flex;flex-direction:column;gap:8px}.csb-related-card img{width:100%;aspect-ratio:16\/9;object-fit:cover;border-radius:10px}.csb-related-card strong{font-size:14px;line-height:1.4}.csb-recovery-lightbox{display:none;position:fixed;inset:0;z-index:2147483000;align-items:center;justify-content:center;padding:46px 18px 18px;background:rgba(0,0,0,.93);box-sizing:border-box}.csb-recovery-lightbox:target{display:flex}.csb-recovery-backdrop{position:absolute;inset:0;z-index:0}.csb-recovery-lightbox img{position:relative;z-index:1;display:block;width:auto!important;height:auto!important;max-width:96vw!important;max-height:88vh!important;object-fit:contain;border-radius:0!important}.csb-recovery-close{position:absolute;z-index:2;right:18px;top:10px;padding:7px 12px;background:#fff;color:#111!important;border-radius:6px;font:600 16px\/1.4 system-ui;text-decoration:none!important}.csb-recovery-close:focus-visible{outline:3px solid #ffcf5a;outline-offset:3px}@media(max-width:620px){.fbp5-wrap{font-size:16px;padding:0 16px}.fbp5-wrap h2{font-size:23px}.csb-related-grid{grid-template-columns:1fr}}\n\n  \/* RH_FBP5_CARDS_CSS_V1 *\/\n  .fbp5-related-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }\n  .fbp5-telegram-grid { grid-template-columns:repeat(2,1fr); }\n  .fbp5-related-card { display:block; overflow:hidden; border:1px solid var(--border,#ebebeb); border-radius:8px; background:var(--card,#fff); color:inherit !important; text-decoration:none !important; transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease; }\n  .fbp5-related-card:hover { transform:translateY(-2px); border-color:rgba(204,27,27,.35); box-shadow:0 16px 36px rgba(18,18,18,.10); }\n  .fbp5-related-card img { display:block; width:100%; aspect-ratio:16\/9; object-fit:cover; background:var(--surface-soft,#fafafa); }\n  .fbp5-related-thumb-placeholder { width:100%; aspect-ratio:16\/9; display:flex; align-items:center; justify-content:center; background:linear-gradient(135deg,rgba(204,27,27,.10),rgba(204,27,27,.03)); color:var(--red,#CC1B1B); font-family:var(--font-head,'Bebas Neue',sans-serif); font-size:28px; letter-spacing:.04em; }\n  .fbp5-related-body { padding:12px; }\n  .fbp5-related-body span { display:block; margin:0 0 6px; color:var(--red,#CC1B1B); font-size:11px; font-weight:900; letter-spacing:.08em; text-transform:uppercase; }\n  .fbp5-related-body strong { display:block; font-size:15px; line-height:1.25; color:var(--text,#1a1a1a); }\n  .fbp5-related-body small { display:block; margin:7px 0 0; color:var(--text-muted,#666); font-size:13px; line-height:1.35; }\n  @media(max-width:720px) {\n    .fbp5-telegram-grid { grid-template-columns:1fr; }\n    .fbp5-related-grid:not(.fbp5-telegram-grid) { grid-template-columns:1fr; }\n    .fbp5-related-grid:not(.fbp5-telegram-grid) .fbp5-related-card { display:grid; grid-template-columns:112px minmax(0,1fr); align-items:stretch; }\n    .fbp5-related-grid:not(.fbp5-telegram-grid) .fbp5-related-card img,\n    .fbp5-related-grid:not(.fbp5-telegram-grid) .fbp5-related-thumb-placeholder { height:100%; min-height:92px; aspect-ratio:auto; }\n  }\n<\/style>\n<style>.csb-recovery-lightbox{z-index:999999!important}.csb-recovery-close{top:58px!important;right:24px!important}<\/style><article class=\"fbp5-wrap rh-json-article\" data-rh-article-type=\"news\" data-rh-site-profile=\"china-smart-buy\"><p class=\"fbp5-lead\"><strong>Alpine Linux ha pubblicato un avviso urgente per una falla che pu\u00f2 aggirare l\u2019autenticazione SSH.<\/strong> Il problema, soprannominato <em>*sshole<\/em>, non riguarda indistintamente tutti i computer Linux: richiede una combinazione precisa di libreria musl, configurazione del server e account locali. Le correzioni sono gi\u00e0 disponibili.<\/p>\n<h2>Quali installazioni sono esposte<\/h2>\n<p>Il <a href=\"https:\/\/alpinelinux.org\/posts\/2026-11-05-openssh-password-authentication-bypass\/\" target=\"_blank\" rel=\"noopener\">bollettino Alpine del 5 novembre<\/a> indica i server OpenSSH senza PAM, oppure con PAM disattivato, che consentono l\u2019accesso tramite password. Devono inoltre coesistere un account con il campo password impostato a <code>*<\/code> e un altro account con hash SHA-256 o SHA-512. \u00c8 una condizione importante: possedere un dispositivo Linux, da solo, non significa essere vulnerabili.<\/p>\n<p>Nei sistemi interessati, un errore nella verifica della password pu\u00f2 essere scambiato per una corrispondenza valida. Il progetto OpenSSH ha introdotto una contromisura in <strong>10.6p2<\/strong>, come spiegano le <a href=\"https:\/\/www.openssh.org\/releasenotes.html\" target=\"_blank\" rel=\"noopener\">note ufficiali di rilascio<\/a>. Non si tratta di una debolezza della cifratura SSH n\u00e9 di una fuga generalizzata delle chiavi private.<\/p>\n<figure id=\"csb-alpine-photo-0\" class=\"wp-block-image size-large\"><a href=\"#csb-alpine-lightbox-0\" data-lightbox=\"csb-alpine\"><img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/11\/alpine-0-csb-20261106-0150.webp\" alt=\"Logo ufficiale della distribuzione Alpine Linux su fondo bianco\" width=\"1600\" height=\"900\" loading=\"lazy\"><\/a><figcaption>Logo ufficiale Alpine Linux, usato come immagine identificativa e anche come cover. Non \u00e8 una schermata dell\u2019attacco. Crediti: Alpine Linux.<\/figcaption><\/figure>\n<h2>Aggiornare, poi riavviare il servizio<\/h2>\n<p>Alpine ha rilasciato le versioni <strong>3.21.10, 3.22.8, 3.23.8 e 3.24.4<\/strong> con i pacchetti corretti. Sono disponibili patch anche per rami precedenti: la <a href=\"https:\/\/alpinelinux.org\/posts\/alpine-3.21.10-3.22.8-3.23.8-3.24.4-released\/\" target=\"_blank\" rel=\"noopener\">comunicazione delle nuove release<\/a> e la tabella del bollettino permettono di verificare il proprio ramo senza confrontare soltanto il numero della versione upstream.<\/p>\n<p>Dopo l\u2019aggiornamento va <strong>riavviato sshd<\/strong>: il processo gi\u00e0 in esecuzione non viene sostituito dal solo download del pacchetto. Nell\u2019attesa della patch, Alpine indica la disattivazione dei login con password, verificando prima che l\u2019accesso con chiave funzioni per evitare di restare esclusi dal sistema.<\/p>\n<h2>Container e dispositivi: niente allarmi generalizzati<\/h2>\n<p>Un container che non esegue sshd non rientra nel caso descritto. Non \u00e8 quindi corretto estendere l\u2019allarme a ogni immagine Docker o a tutti i router: conta la configurazione effettiva. \u00c8 una distinzione utile anche rispetto alla diversa <a href=\"https:\/\/www.chinasmartbuy.com\/blog\/linux-kvm-januscape-vulnerabilita-patch-kernel\/\">falla Januscape in Linux KVM<\/a>, che interessava la virtualizzazione e non questo meccanismo di login.<\/p>\n<div id=\"csb-alpine-lightbox-0\" class=\"csb-recovery-lightbox\" role=\"dialog\" aria-modal=\"true\" aria-label=\"Immagine ingrandita\"><a class=\"csb-recovery-backdrop\" href=\"#csb-alpine-photo-0\" aria-label=\"Chiudi immagine\"><\/a><img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/11\/alpine-0-csb-20261106-0150.webp\" alt=\"Logo ufficiale della distribuzione Alpine Linux su fondo bianco\" loading=\"lazy\"><a class=\"csb-recovery-close\" href=\"#csb-alpine-photo-0\">Chiudi \u00d7<\/a><\/div><section class=\"fbp5-section\" data-rh-related-section=\"1\">\n      <div class=\"fbp5-section-label\">Articoli correlati<\/div>\n      <h2>Altre notizie <span>da leggere<\/span><\/h2>\n      <div class=\"fbp5-related-grid\"><a class=\"fbp5-related-card\" href=\"https:\/\/www.chinasmartbuy.com\/blog\/linux-kvm-januscape-vulnerabilita-patch-kernel\/\" target=\"_blank\" rel=\"noopener\">\n      <img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/07\/linux-kvm-scoperta-la-falla-januscape-7c636021-8231-4dea-98c0-7f71-18o2lm31b4-768x431.webp\" alt=\"Linux KVM, scoperta la falla Januscape: una VM pu\u00f2 mandare in crash l\u2019host\" loading=\"lazy\">\n      <div class=\"fbp5-related-body\">\n        <span>chinasmartbuy.com<\/span>\n        <strong>Linux KVM, scoperta la falla Januscape: una VM pu\u00f2 mandare in crash l\u2019host<\/strong>\n        \n      <\/div>\n    <\/a><a class=\"fbp5-related-card\" href=\"https:\/\/www.chinasmartbuy.com\/blog\/linux-airdrop-mac-intel-chip-t2\/\" target=\"_blank\" rel=\"noopener\">\n      <img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/11\/linux-pu-portare-airdrop-sui-mac-intel-con-chip-t2-dc6796aa-b294-40ea-ba4f-f24a-1o28m0618c-768x443.webp\" alt=\"Linux pu\u00f2 portare AirDrop sui Mac Intel con chip T2\" loading=\"lazy\">\n      <div class=\"fbp5-related-body\">\n        <span>chinasmartbuy.com<\/span>\n        <strong>Linux pu\u00f2 portare AirDrop sui Mac Intel con chip T2<\/strong>\n        \n      <\/div>\n    <\/a><a class=\"fbp5-related-card\" href=\"https:\/\/www.chinasmartbuy.com\/blog\/virtualbox-7-2-14-supporto-linux-7-2\/\" target=\"_blank\" rel=\"noopener\">\n      <img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/07\/virtualbox-7-2-14-disponibile-packaging-0a347735-20f3-447e-a4ba-8a67-n0hw9k9mgg-768x499.webp\" alt=\"VirtualBox 7.2.14 disponibile: fix per Windows 11 e supporto iniziale a Linux 7.2\" loading=\"lazy\">\n      <div class=\"fbp5-related-body\">\n        <span>chinasmartbuy.com<\/span>\n        <strong>VirtualBox 7.2.14 disponibile: fix per Windows 11 e supporto iniziale a Linux 7.2<\/strong>\n        \n      <\/div>\n    <\/a><\/div>\n    <\/section><div class=\"rh-attribution-pills\" style=\"display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-start;margin:16px 0 0\"><a href=\"https:\/\/alpinelinux.org\/posts\/2026-11-05-openssh-password-authentication-bypass\/\" target=\"_blank\" rel=\"noopener\" title=\"Fonte: Alpine Linux\" aria-label=\"Fonte: Alpine Linux\" style=\"display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:16px;background:linear-gradient(135deg,#eff6ff,#dbeafe);color:#1d4ed8;text-decoration:none;font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;border:1px solid rgba(59,130,246,.20);box-shadow:0 8px 22px rgba(37,99,235,.08)\">Fonte<\/a><\/div><\/article>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019avviso riguarda configurazioni specifiche con autenticazione password attiva. Alpine e OpenSSH hanno gi\u00e0 rilasciato le correzioni; aggiornare il pacchetto non basta senza riavviare il servizio.<\/p>\n","protected":false},"author":5,"featured_media":56870,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_yoast_wpseo_focuskw_text_input":"Alpine Linux falla SSH","footnotes":""},"categories":[480],"tags":[1241,1846],"class_list":["post-56872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-linux","tag-sicurezza"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Alpine Linux: falla SSH senza password, patch disponibili<\/title>\n<meta name=\"description\" content=\"Alpine corregge un bypass SSH legato a musl e PAM disabilitato. Non tutti i sistemi Linux sono colpiti: condizioni, versioni corrette e riavvio di sshd.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.chinasmartbuy.com\/blog\/alpine-linux-falla-ssh-accesso-senza-password-patch\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Alpine Linux: falla SSH senza password, patch disponibili\" \/>\n<meta property=\"og:description\" content=\"Alpine corregge un bypass SSH legato a musl e PAM disabilitato. 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