CVE-2024-20494
Published Oct 23, 2024
CVSS 3.1 · 8.6 High
EPSS < 1%
KEV · Not listed
Description
A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM).
This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM).
Affected Products
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CVE record
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NVD configurations
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Red Hat packages
No data
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OpenCVE enrichment
No data
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | affected |
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| Cisco | Cisco Firepower Threat Defense Software | affected |
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Configuration 1 [-]
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Configuration 2 [-]
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No data.
No data available yet.
Remediation
Tracking
Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2024-18209 | A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM). |
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.518% probability within 30 days)
Exploitation none
Automatable yes
Technical Impact partial
References
History
Aug 11, 2026 8:00 PM
First appearance in the feed. Affected versions updated. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco secure Firewall Threat Defense
|
|
| CPEs | cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.2:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.3.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.0:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.2:*:*:*:*:*:*:* |
cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.2:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2:*:*:*:*:*:*:* |
| Vendors & Products |
Cisco firepower Threat Defense
|
Cisco secure Firewall Threat Defense
|
Aug 1, 2025 6:45 PM
First appearance in the feed. Affected versions updated. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco firepower Threat Defense
|
|
| CPEs | cpe:2.3:a:cisco:firepower_threat_defense:7.3.0:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.2:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.3.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.0:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.1.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.1:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:7.4.2:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.12:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.18:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.22:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.24:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.27:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.28:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.31:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.5:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.9:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.10:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.21:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.22:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.3:*:*:*:*:*:*:* |
|
| Vendors & Products |
Cisco firepower Threat Defense
|
Oct 23, 2024 8:15 PM
First appearance in the feed. Affected versions updated. Affected vendors updated. Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco
Cisco adaptive Security Appliance Software Cisco firepower Threat Defense Software |
|
| CPEs | cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* |
|
| Vendors & Products |
Cisco
Cisco adaptive Security Appliance Software Cisco firepower Threat Defense Software |
|
| Metrics |
ssvc
|
Oct 23, 2024 6:00 PM
Description updated. Weaknesses updated. Added references. Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM). | |
| Weaknesses | CWE-1287 | |
| References |
| |
| Metrics |
cvssV3_1
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Subscriptions
Weaknesses
