Cette page suit l'état du correctif pour Ubuntu. La vulnérabilité elle-même est décrite sur la page CVE principale. Voir CVE-2026-39821 →

UBUNTU-CVE-2026-39821

Vulnérabilité dans golang-golang-x-net-dev (UBUNTU-CVE-2026-39821)

Résumé

Vulnérabilité dans golang-golang-x-net-dev (UBUNTU-CVE-2026-39821). Des informations confidentielles peuvent être exposées. Atténuation : mise à jour vers 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3 ou plus.

Description d'origine

La description telle que publiée par la source (souvent en anglais).

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".

Source: OSV.dev (Open Source Vulnerabilities) OSV

Résumé généré automatiquement

Assemblé par SecPulse à partir des données sources (CVSS, CWE, versions affectées) à l'aide de modèles, sans IA. Vérifiez la description d'origine et les références ci-dessous.

Une vulnérabilité référencée UBUNTU-CVE-2026-39821 a été découverte dans golang-golang-x-net-dev.
Des informations confidentielles peuvent être exposées.
Action : mettez à jour golang-golang-x-net-dev vers 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3 ou supérieur.
En cas de doute, contactez votre service informatique ou cherchez « golang-golang-x-net-dev UBUNTU-CVE-2026-39821 » sur le site de l'éditeur.

UBUNTU-CVE-2026-39821 (golang-golang-x-net-dev)
Vecteur d'attaque : distant (réseau) / sans interaction utilisateur
Correctif : 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3 — appliquer immédiatement
Plan : 1) Audit SBOM, 2) Mise à jour staging→prod, 3) Surveillance WAF/proxy sur les endpoints affectés, 4) Recherche d'IOC dans les logs.
Réfs : voir GHSA / avis éditeur / version corrigée liés sur cette page.

❓ Quel est le problème

Une vulnérabilité (non classée) affecte golang-golang-x-net-dev.

📍 Périmètre concerné

Consultez l'avis de l'éditeur pour les versions affectées de golang-golang-x-net-dev.

🔥 Gravité

Gravité : ?. Des informations confidentielles peuvent être exposées.

🔧 Comment corriger

Mettre à jour vers 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3.

🛡️ Contournement

En attendant le correctif : désactivez la fonctionnalité concernée, appliquez des règles WAF, ou restreignez l'accès par ACL réseau.

🔍 Détection

Recherchez dans les logs des requêtes correspondant aux IOC connus de cette CVE. Auditez les SBOM/dépendances.

Actions de réponse

Étapes concrètes et exemples de commandes que les équipes SOC/SRE doivent exécuter dans l'ordre

1
Identify exposure identify
```
grep -r 'golang-golang-x-net-dev' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で golang-golang-x-net-dev を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade golang-golang-x-net-dev to 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3
```
ステージング環境で 1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Paquets affectés

Ubuntu:Pro:16.04:LTS golang-golang-x-net-dev

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS golang-golang-x-net-dev

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3"}]}]

Ubuntu:Pro:20.04:LTS golang-golang-x-net-dev

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0+git20190811.74dc4d7+dfsg-1ubuntu0.1~esm3"}]}]

Ubuntu:14.04:LTS golang-1.10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:16.04:LTS golang-1.10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:16.04:LTS golang-1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS juju-core

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS lxd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS golang-1.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS golang-1.18

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:16.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS golang-1.10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS lxd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS golang-1.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS golang-1.16

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS golang-1.18

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS golang-1.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS golang-1.9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:18.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:20.04:LTS adsys

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:20.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:20.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:20.04:LTS golang-1.16

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.18

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.20

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.21

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS golang-1.22

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:20.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS lxd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS adsys

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-1.17

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-1.18

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1-1ubuntu1.3"}]}]

Ubuntu:22.04:LTS golang-1.20

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-1.21

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21.1-1~ubuntu22.04.4"}]}]

Ubuntu:22.04:LTS golang-1.22

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-1.23

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.1-1~22.04.3"}]}]

Ubuntu:22.04:LTS golang-1.24

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.13-2~22.04.2"}]}]

Ubuntu:22.04:LTS golang-1.25

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-1.26

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS golang-golang-x-net

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0+git20211209.491a49a+dfsg-1ubuntu0.1"}]}]

Ubuntu:22.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20250116.00-0ubuntu1~22.04.4"}]}]

Ubuntu:22.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20251028.00-0ubuntu2~22.04.1"}]}]

Ubuntu:Pro:22.04:LTS golang-1.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS adsys

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.21

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.22

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.23

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.24

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.25

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS golang-1.26

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:24.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:24.04:LTS golang-golang-x-net

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 adsys

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 golang-1.26

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 golang-1.27

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 golang-golang-x-net

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.10 google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS adsys

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS golang-1.23

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS golang-1.24

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS golang-1.25

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS golang-1.26

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS golang-golang-x-net

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS google-guest-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS google-osconfig-agent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:Pro:26.04:LTS containerd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Références

advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
report ubuntu.com
report cve.org
report groups.google.com
report github.com
report go.dev
report go.dev
report pkg.go.dev