CVE-2022-20866
First published: Wed Aug 10 2022(Updated: )
A vulnerability in the handling of RSA keys on devices running Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve an RSA private key. This vulnerability is due to a logic error when the RSA key is stored in memory on a hardware platform that performs hardware-based cryptography. An attacker could exploit this vulnerability by using a Lenstra side-channel attack against the targeted device. A successful exploit could allow the attacker to retrieve the RSA private key. The following conditions may be observed on an affected device: This vulnerability will apply to approximately 5 percent of the RSA keys on a device that is running a vulnerable release of Cisco ASA Software or Cisco FTD Software; not all RSA keys are expected to be affected due to mathematical calculations applied to the RSA key. The RSA key could be valid but have specific characteristics that make it vulnerable to the potential leak of the RSA private key. If an attacker obtains the RSA private key, they could use the key to impersonate a device that is running Cisco ASA Software or Cisco FTD Software or to decrypt the device traffic. See the Indicators of Compromise section for more information on the detection of this type of RSA key. The RSA key could be malformed and invalid. A malformed RSA key is not functional, and a TLS client connection to a device that is running Cisco ASA Software or Cisco FTD Software that uses the malformed RSA key will result in a TLS signature failure, which means a vulnerable software release created an invalid RSA signature that failed verification. If an attacker obtains the RSA private key, they could use the key to impersonate a device that is running Cisco ASA Software or Cisco FTD Software or to decrypt the device traffic.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance Software | >=9.16.0<9.16.3.19 | |
| Cisco Adaptive Security Appliance Software | >=9.17.0<9.17.1.13 | |
| Cisco Adaptive Security Appliance Software | >=9.18.0<9.18.2 | |
| Cisco Firepower Threat Defense | >=7.0.0<7.0.4 | |
| Cisco Firepower Threat Defense | >=7.1.0<7.2.0.1 | |
| Cisco ASA 5506-X | ||
| Cisco Asa 5506h-x | ||
| Cisco Asa 5506w-x | ||
| Cisco Asa 5508-x | ||
| Cisco Asa 5516-x | ||
| Cisco Firepower 1000 | ||
| Cisco Firepower 1010 | ||
| Cisco Firepower 1020 | ||
| Cisco Firepower 1030 | ||
| Cisco Firepower 1040 | ||
| Cisco Firepower 1120 | ||
| Cisco Firepower 1140 | ||
| Cisco Firepower 1150 | ||
| Cisco Firepower 2100 | ||
| Cisco Firepower 2110 | ||
| Cisco Firepower 2120 | ||
| Cisco Firepower 2130 | ||
| Cisco Firepower 2140 | ||
| Cisco Firepower 4100 | ||
| Cisco Firepower 4110 | ||
| Cisco Firepower 4112 | ||
| Cisco Firepower 4115 | ||
| Cisco Firepower 4120 | ||
| Cisco Firepower 4125 | ||
| Cisco Firepower 4140 | ||
| Cisco Firepower 4145 | ||
| Cisco Firepower 4150 | ||
| Cisco Firepower 9300 | ||
| Cisco Secure Firewall 3110 | ||
| Cisco Secure Firewall 3120 | ||
| Cisco Secure Firewall 3130 | ||
| Cisco Secure Firewall 3140 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-20866?
CVE-2022-20866 is a vulnerability in the handling of RSA keys on devices running Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.
What is the severity of CVE-2022-20866?
The severity of CVE-2022-20866 is high, with a CVSS score of 7.5.
Which software versions are affected by CVE-2022-20866?
Devices running Cisco Adaptive Security Appliance (ASA) Software versions 9.16.0 to 9.16.3.19, 9.17.0 to 9.17.1.13, and 9.18.0 to 9.18.2, as well as Cisco Firepower Threat Defense (FTD) Software versions 7.0.0 to 7.0.4 and 7.1.0 to 7.2.0.1 are affected by CVE-2022-20866.
How can an attacker exploit CVE-2022-20866?
An unauthenticated, remote attacker can exploit CVE-2022-20866 to retrieve an RSA private key due to a logic error when the RSA key is processed.
Is Cisco ASA 5506-X vulnerable to CVE-2022-20866?
No, Cisco ASA 5506-X is not vulnerable to CVE-2022-20866.
- collector/nvd-index
- vendor/cisco
- canonical/cisco adaptive security appliance software
- version/cisco adaptive security appliance software/9.16.0
- version/cisco adaptive security appliance software/9.17.0
- version/cisco adaptive security appliance software/9.18.0
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/7.0.0
- version/cisco firepower threat defense/7.1.0
- canonical/cisco asa 5506-x
- canonical/cisco asa 5506h-x
- canonical/cisco asa 5506w-x
- canonical/cisco asa 5508-x
- canonical/cisco asa 5516-x
- canonical/cisco firepower 1000
- canonical/cisco firepower 1010
- canonical/cisco firepower 1020
- canonical/cisco firepower 1030
- canonical/cisco firepower 1040
- canonical/cisco firepower 1120
- canonical/cisco firepower 1140
- canonical/cisco firepower 1150
- canonical/cisco firepower 2100
- canonical/cisco firepower 2110
- canonical/cisco firepower 2120
- canonical/cisco firepower 2130
- canonical/cisco firepower 2140
- canonical/cisco firepower 4100
- canonical/cisco firepower 4110
- canonical/cisco firepower 4112
- canonical/cisco firepower 4115
- canonical/cisco firepower 4120
- canonical/cisco firepower 4125
- canonical/cisco firepower 4140
- canonical/cisco firepower 4145
- canonical/cisco firepower 4150
- canonical/cisco firepower 9300
- canonical/cisco secure firewall 3110
- canonical/cisco secure firewall 3120
- canonical/cisco secure firewall 3130
- canonical/cisco secure firewall 3140