CVE-2021-1402High· 8.6▾ TwilightA vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (D…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.3 · likelihood 0.3 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
1.4%
A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message through an affected device. SSL/TLS messages sent to an affected device do not trigger this vulnerability. A successful exploit could allow the attacker to cause a process to crash. This crash would then trigger a reload of the device. No manual intervention is needed to recover the device after the reload.
secure_firewall_threat_defense >= 6.3.0, < 6.4.0secure_firewall_threat_defense >= 6.5.0, < 6.6.0Upgrade past the affected range:
secure_firewall_threat_defense 6.6.0Connected by shared product, vendor, weakness, or advisory.
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