CVE-2024-20260
Vulnérabilité élevée dans Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (Cisco)
Description
Update for September 16, 2026: The original 1.0 version of this advisory was specific to the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco Secure Firewall Threat Defense Virtual (FTDv) models. However, it was later found that this vulnerability affects all Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software platforms. A vulnerability in the VPN and management web servers of the Cisco Secure Firewall ASA Software and Cisco Secure FTD Software platforms could allow an unauthenticated, remote attacker to cause an affected device to run out of system memory or buffer blocks, which in turn could cause SSL VPN connection processing to slow down and eventually cease altogether. This vulnerability is due to a lack of proper memory management for new incoming SSL/TLS connections. An attacker could exploit this vulnerability by sending a large number of new incoming SSL/TLS connections to the targeted device. A successful exploit could allow the attacker to deplete system memory or buffers, resulting in a denial of service (DoS) condition. The memory or buffers could be reclaimed slowly if the attack traffic is stopped, but a manual reload may be required to restore operations quickly.
Gravité et risque d'exploitation
CVE-2024-20260 obtient un score CVSS de 8.6/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.59 %, ce qui la place devant 47.4 % des CVE référencées.
Que faire ?
- Vérifiez si Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (versions 7.0.4, 7.2.2, 7.0.6.3, 9.16.4.27, 9.18.4.8, 9.16.3.15, 7.2.8.1, 7.4.2, 9.20.2.10, 9.19.1.9, 9.23.1.3, 7.2.4, 9.19.1.18, 9.19.1.27, 9.16.4.62, 9.19.1.37, 7.0.6.1, 9.16.1.28, 9.23.1.13, 7.2.8, 7.3.1.1, 9.20.3.7, 9.20.3.10, 9.16.4.9, 9.16.2.7, 9.18.4.29, 7.0.5, 7.2.0, 7.2.0.1, 7.7.10.1, 9.16.4.55, 9.18.3.56, 9.18.4.67, 9.16.4.67, 9.18.4.24, 9.18.3.55, 7.0.2, 7.2.1, 9.16.4.61, 7.0.7, 9.18.4.22, 9.16.4.42, 9.20.3.9, 7.0.6, 9.16.4.89, 7.6.0, 9.20.4.14, 7.0.1, 9.16.4.85, 9.22.1.1, 9.23.1.19, 7.2.10, 9.22.2.13, 9.16.3.19, 9.20.4.10, 9.16.4.48, 9.16.4.84, 9.18.4.53, 7.4.3, 9.19.1.42, 9.22.1.3, 9.19.1.38, 9.18.1.3, 9.22.2.9, 9.18.4.66, 7.6.2, 9.20.1.5, 9.18.2, 9.18.3, 9.16.4.76, 9.20.1, 9.18.4, 7.4.1.1, 9.20.2, 7.0.0.1, 9.20.3.13, 9.16.4.39, 7.0.1.1, 9.18.2.8, 7.2.3, 7.6.2.1, 7.3.0, 9.22.2, 7.4.2.1, 9.18.3.53, 7.3.1.2, 9.18.1, 9.23.1, 9.16.4.71, 7.2.5.2, 9.20.4.7, 9.16.3, 9.16.2.14, 9.16.4.19, 9.16.4.82, 7.0.8.1, 7.2.10.2, 9.19.1.22, 9.18.4.68, 7.2.5, 7.0.2.1, 9.20.3.16, 9.16.3.23, 9.23.1.22, 9.16.2.11, 9.18.4.34, 7.7.0, 9.18.4.47, 9.18.4.52, 7.7.10, 9.16.3.3, 7.2.9, 9.20.4, 9.18.2.5, 7.0.3, 7.2.5.1, 9.16.2.3, 9.19.1.28, 7.6.1, 7.7.11, 9.16.4.70, 7.4.0, 7.2.7, 7.4.2.4, 7.0.9, 9.20.3, 9.22.2.20, 7.6.4, 7.2.4.1, 9.19.1.24, 9.18.3.39, 9.16.4.14, 9.16.2, 9.19.1, 9.16.4.92, 9.16.4.38, 9.16.3.14, 9.22.1.6, 9.18.4.40, 9.23.1.7, 9.22.2.14, 7.4.1, 9.20.3.20, 7.4.2.2, 9.20.2.21, 7.4.2.3, 7.2.6, 7.0.0, 9.18.2.7, 9.16.4.18, 7.0.6.2, 9.16.1, 9.20.3.4, 9.22.1.2, 9.20.4.19, 9.16.4.57, 9.22.2.4, 9.19.1.5, 9.16.4, 9.18.3.46, 9.19.1.31, 7.0.8, 9.16.2.13, 9.20.2.22, 9.18.4.50, 9.19.1.12, 9.18.4.5, 7.3.1, 9.18.4.57) 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.