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CVE-2026-27820: French translation #3891
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fr/news/_posts/2026-03-05-buffer-overflow-zlib-cve-2026-27820.md
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| Original file line number | Diff line number | Diff line change |
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| --- | ||
| layout: news_post | ||
| title: "CVE-2026-27820 : Vulnérabilité de type débordement de tampon dans Zlib::GzipReader" | ||
| author: "hsbt" | ||
| translator: "Alexandre ZANNI" | ||
| date: 2026-03-05 00:00:00 +0000 | ||
| tags: security | ||
| lang: fr | ||
| --- | ||
| Une vulnérabilité de type débordement de tampon (_buffer overflow_) existe dans `Zlib::GzipReader`. Cette vulnérabilité s'est vu attribuer l'identifiant CVE [CVE-2026-27820](https://www.cve.org/CVERecord?id=CVE-2026-27820). Nous recommandons de mettre à jour la gemme zlib. | ||
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| ### Détails | ||
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| La fonction `zstream_buffer_ungets` ajoute les octets fournis par l'appelant au début de la sortie précédemment générée, mais ne garantit pas que la chaîne Ruby sous-jacente dispose d'une capacité suffisante avant que la fonction `memmove` ne déplace les données existantes. Cela peut entraîner une corruption de la mémoire lorsque la longueur du tampon dépasse la capacité disponible. | ||
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| ### Action recommandée | ||
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| Nous recommandons de mettre à jour la gemme `zlib` vers la version 3.2.3 ou une version ultérieure. Afin d'assurer la compatibilité avec la version fournie dans les anciennes branches Ruby, vous pouvez effectuer la mise à jour comme suit : | ||
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| * Pour les utilisateurs de Ruby 3.2 : mettez à jour vers zlib 3.0.1 | ||
| * Pour les utilisateurs de Ruby 3.3 : mettez à jour vers zlib 3.1.2 | ||
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| Vous pouvez utiliser `gem update zlib` pour effectuer la mise à jour. Si vous utilisez Bundler, veuillez ajouter `gem « zlib », « >= 3.2.3 »` à votre Gemfile. | ||
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| ### Versions concernées | ||
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| Gem zlib 3.2.2 ou antérieure | ||
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| ### Remerciements | ||
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| Merci à [calysteon](https://hackerone.com/calysteon) d'avoir signalé ce problème. Merci également à [nobu](https://github.com/nobu) d'avoir créé le correctif. | ||
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| ## Historique | ||
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| * Publié initialement le 05/03/2026 à 09:00:00 (UTC) | ||
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