CVE-2021-1402: Cisco Firepower Threat Defense Software SSL Decryption Policy Denial of Service Vulnerability
First published: Wed Apr 28 2021(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | >=6.3.0<6.4.0 | |
| Cisco Firepower Threat Defense | >=6.5.0<6.6.0 | |
| Cisco Firepower Threat Defense Virtual | ||
| Cisco Asa 5512-x | ||
| Cisco Asa 5515-x | ||
| Cisco Asa 5525-x | ||
| Cisco Asa 5545-x | ||
| Cisco Asa 5555-x | ||
| Cisco Firepower 1010 | ||
| Cisco Firepower 1120 | ||
| Cisco Firepower 1140 | ||
| Cisco Firepower 1150 | ||
| Cisco Firepower 2110 | ||
| Cisco Firepower 2120 | ||
| Cisco Firepower 2130 | ||
| Cisco Firepower 2140 | ||
| Cisco Isa 3000 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-1402?
CVE-2021-1402 is a vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software.
How does CVE-2021-1402 affect Cisco Firepower Threat Defense?
CVE-2021-1402 allows an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition.
What is the severity of CVE-2021-1402?
CVE-2021-1402 has a severity rating of 8.6, which is considered high.
How can I fix CVE-2021-1402?
To fix CVE-2021-1402, update to a version of Cisco Firepower Threat Defense (FTD) Software that is not affected by the vulnerability.
Where can I find more information about CVE-2021-1402?
You can find more information about CVE-2021-1402 on the Cisco Security Advisory page at https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c.
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- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/6.3.0
- version/cisco firepower threat defense/6.5.0
- canonical/cisco firepower threat defense virtual
- canonical/cisco asa 5512-x
- canonical/cisco asa 5515-x
- canonical/cisco asa 5525-x
- canonical/cisco asa 5545-x
- canonical/cisco asa 5555-x
- canonical/cisco firepower 1010
- canonical/cisco firepower 1120
- canonical/cisco firepower 1140
- canonical/cisco firepower 1150
- canonical/cisco firepower 2110
- canonical/cisco firepower 2120
- canonical/cisco firepower 2130
- canonical/cisco firepower 2140
- canonical/cisco isa 3000