CVE-2024-8096

Description

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than 'revoked' (like for example 'unauthorized') it is not treated as a bad certficate.

Gravité et risque d'exploitation

CVE-2024-8096 obtient un score CVSS de 6.5/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.82 %, ce qui la place devant 56.3 % des CVE référencées.

Que faire ?

• Vérifiez si curl (versions 7.71.0, <=7.82.0, <=7.79.1, 7.65.3, 7.45.0, 7.51.0, <=7.83.1, 7.84.0, <=7.61.0, <=7.62.0, <=8.5.0, 7.81.0, <=7.45.0, 7.77.0, 7.65.2, 7.52.1, <=7.44.0, 8.1.0, <=7.58.0, <=7.55.1, <=7.56.1, <=7.50.1, <=7.54.1, 7.48.0, <=7.61.1, <=7.71.0, 7.82.0, 8.9.0, <=7.69.0, 7.64.1, <=7.47.1, <=7.64.0, <=8.1.2, 7.85.0, 7.56.0, <=7.53.0, 8.6.0, 8.4.0, 7.50.2, <=7.49.1, 7.78.0, 7.54.0, 7.79.1, <=7.50.2, <=7.50.3, <=7.64.1, <=7.70.0, <=7.52.0, 7.55.1, <=7.65.2, <=8.6.0, <=7.41.0, 7.83.0, 7.62.0, 8.1.2, <=7.69.1, <=8.1.0, <=7.74.0, 7.56.1, 7.42.0, 7.83.1, 7.65.0, <=7.57.0, 7.49.1, 7.42.1, 7.69.0, 7.68.0, <=7.50.0, <=7.59.0, 7.46.0, 7.53.0, 8.2.1, <=7.79.0, <=7.71.1, <=7.67.0, 7.71.1, 7.54.1, <=7.48.0, 8.3.0, 8.2.0, 7.57.0, 7.63.0, <=7.85.0, <=7.43.0, <=7.47.0, <=7.60.0, 7.47.0, 7.70.0, <=7.76.0, 8.1.1, 7.76.1, <=7.55.0, <=7.73.0, 7.50.0, <=7.76.1, <=7.77.0, <=7.42.0, <=7.88.0, <=7.65.3, <=8.0.0, <=7.81.0, 7.80.0, 7.76.0, 7.60.0, <=8.9.0, 7.49.0, 7.61.0, <=7.68.0, <=7.65.1, 7.88.1, 7.61.1, 7.88.0, <=7.65.0, <=8.8.0, 7.43.0, <=7.49.0, 7.86.0, <=7.66.0, <=7.86.0, <=7.88.1, <=7.72.0, 7.53.1, 8.8.0, 7.59.0, 7.66.0, 7.52.0, 7.65.1, 8.7.1, 7.67.0, <=7.78.0, <=8.2.1, 7.69.1, <=7.56.0, <=7.51.0, <=7.54.0, <=8.0.1, 7.55.0, 7.79.0, 8.5.0, 7.64.0, 7.75.0, 7.73.0, 7.72.0, <=8.7.0, <=7.75.0, 8.7.0, 8.9.1, <=7.83.0, <=7.80.0, 8.0.0, 7.47.1, 7.87.0, 7.50.3, 7.44.0, <=8.3.0, <=7.53.1, <=7.52.1, 7.41.0, <=8.7.1, <=7.46.0, <=8.4.0, 7.50.1, <=7.87.0, 8.0.1, <=8.1.1, <=8.9.1, <=8.2.0, <=7.42.1, 7.74.0, <=7.63.0, <=7.84.0, 7.58.0) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• https://curl.se/docs/CVE-2024-8096.json
• https://curl.se/docs/CVE-2024-8096.html
• https://hackerone.com/reports/2669852