Published on: Not Yet Published

Last Modified on: 08/15/2022 06:25:00 PM UTC

CVE-2022-20866 - advisory for cisco-sa-asaftd-rsa-key-leak-Ms7UEfZz

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF

Certain versions of Adaptive Security Appliance Software from Cisco contain the following vulnerability:

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.

  • CVE-2022-20866 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.
  • The Cisco PSIRT is aware of a public announcement of the vulnerability that is described in this advisory.
  • Affected Vendor/Software: URL Logo Cisco - Cisco Adaptive Security Appliance (ASA) Software version n/a

CVSS3 Score: 7.5 - HIGH

Scope Confidentiality

CVE References

Description Tags Link
No Description Provided
URL Logo CISCO 20220810 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software RSA Private Key Leak Vulnerability

Related QID Numbers

  • 317215 Cisco Adaptive Security Appliance (ASA) Software Rivest Shamir Adleman (RSA) Private Key Leak Vulnerability (cisco-sa-asaftd-rsa-key-leak-Ms7UEfZz)

Exploit/POC from Github

RSA Key Checker for CVE-2022-20866

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationCiscoAdaptive Security Appliance SoftwareAllAllAllAll
Hardware Device InfoCiscoAsa 5506-x-AllAllAll
Hardware Device InfoCiscoAsa 5506h-x-AllAllAll
Hardware Device InfoCiscoAsa 5506w-x-AllAllAll
Hardware Device InfoCiscoAsa 5508-x-AllAllAll
Hardware Device InfoCiscoAsa 5516-x-AllAllAll
Hardware Device InfoCiscoFirepower 1000-AllAllAll
Hardware Device InfoCiscoFirepower 1010-AllAllAll
Hardware Device InfoCiscoFirepower 1020-AllAllAll
Hardware Device InfoCiscoFirepower 1030-AllAllAll
Hardware Device InfoCiscoFirepower 1040-AllAllAll
Hardware Device InfoCiscoFirepower 1120-AllAllAll
Hardware Device InfoCiscoFirepower 1140-AllAllAll
Hardware Device InfoCiscoFirepower 1150-AllAllAll
Hardware Device InfoCiscoFirepower 2100-AllAllAll
Hardware Device InfoCiscoFirepower 2110-AllAllAll
Hardware Device InfoCiscoFirepower 2120-AllAllAll
Hardware Device InfoCiscoFirepower 2130-AllAllAll
Hardware Device InfoCiscoFirepower 2140-AllAllAll
Hardware Device InfoCiscoFirepower 4100-AllAllAll
Hardware Device InfoCiscoFirepower 4110-AllAllAll
Hardware Device InfoCiscoFirepower 4112-AllAllAll
Hardware Device InfoCiscoFirepower 4115-AllAllAll
Hardware Device InfoCiscoFirepower 4120-AllAllAll
Hardware Device InfoCiscoFirepower 4125-AllAllAll
Hardware Device InfoCiscoFirepower 4140-AllAllAll
Hardware Device InfoCiscoFirepower 4145-AllAllAll
Hardware Device InfoCiscoFirepower 4150-AllAllAll
Hardware Device InfoCiscoFirepower 9300-AllAllAll
ApplicationCiscoFirepower Threat DefenseAllAllAllAll
Hardware Device InfoCiscoSecure Firewall 3110-AllAllAll
Hardware Device InfoCiscoSecure Firewall 3120-AllAllAll
Hardware Device InfoCiscoSecure Firewall 3130-AllAllAll
Hardware Device InfoCiscoSecure Firewall 3140-AllAllAll
  • cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5506-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5506h-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5506w-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5508-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5516-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1000:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1010:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1020:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1030:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1040:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1120:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1140:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_1150:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_2100:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_2110:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_2120:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_2130:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_2140:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4100:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4112:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:firepower_9300:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:secure_firewall_3110:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:secure_firewall_3120:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:secure_firewall_3130:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:secure_firewall_3140:-:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2022-20866 : A vulnerability in the handling of RSA keys on devices running Cisco Adaptive Security Appliance…… 2022-08-10 16:28:09
Reddit Logo Icon /r/netcve CVE-2022-20866 2022-08-10 17:38:13
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