CVE-2022-20814
Vulnérabilité élevée dans Cisco TelePresence Video Communication Server (VCS) Expressway (Cisco)
Description
A vulnerability in the certificate validation of Cisco Expressway-C and Cisco TelePresence VCS could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data. The vulnerability is due to a lack of validation of the SSL server certificate that an affected device receives when it establishes a connection to a Cisco Unified Communications Manager device. An attacker could exploit this vulnerability by using a man-in-the-middle technique to intercept the traffic between the devices, and then using a self-signed certificate to impersonate the endpoint. A successful exploit could allow the attacker to view the intercepted traffic in clear text or alter the contents of the traffic. Note: Cisco Expressway-E is not affected by this vulnerability.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Gravité et risque d'exploitation
CVE-2022-20814 obtient un score CVSS de 7.4/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.91 %, ce qui la place devant 59.3 % des CVE référencées.
Que faire ?
- Vérifiez si Cisco TelePresence Video Communication Server (VCS) Expressway (versions X8.7, X8.2, X8.5.2, X8.5, X8.5.1, X12.5.4, X8.8, X8.11.2, X14.0.9, X12.5.6, X8.8.1, X8.7.3, X8.11.3, X8.9.2, X8.7.1, X12.7.0, X12.6.1, X12.6.0, X8.1, X12.5.7, X14.0.0, X8.10.4, X12.5.9, X8.5.3, X14.0.5, X8.9, X8.11.0, X8.6.1, X14.0.6, X8.8.3, X8.11.4, X12.6.4, X8.8.2, X8.10.2, X14.0.7, X8.9.1, X8.2.1, X12.5.0, X12.5.8, X8.10.1, X12.5.5, X12.5.2, X14.0.3, X8.10.0, X12.5.1, X8.7.2, X12.5.3, X12.6.3, X8.2.2, X14.0.8, X8.11.1, X8.6, X14.0.4, X12.6.2, X12.7.1, X8.1.1, X14.0.2, X8.10.3, X14.0.1, X8.1.2) 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-csrf-sqpsSfY6
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bng-Gmg5Gxt
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ncs4k-tl1-GNnLwC6
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-cdp-wnALzvT2
