CVE-2021-34783

Published on: 10/27/2021 12:00:00 AM UTC

Last Modified on: 10/29/2021 02:43:00 PM UTC

CVE-2021-34783 - advisory for cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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

A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability.

  • CVE-2021-34783 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.
  • The Cisco PSIRT is not aware of any public announcements or malicious use 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

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 7.8 - HIGH

Access
Vector ⓘ		 Access
Complexity		 Authentication
NETWORK LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
NONE NONE COMPLETE

CVE References

Description Tags ⓘ Link
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability tools.cisco.com
text/html
 URL Logo CISCO 20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability
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Related QID Numbers

  • 317085 Cisco Adaptive Security Appliance Software (ASA) Software-Based Secure Sockets Layer/Transport Layer Security (SSL/TLS) Denial of Service (DoS) Vulnerability (cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M)
  • 317086 Cisco Firepower Threat Defense (FTD) Software Software-Based Secure Sockets Layer/Transport Layer Security (SSL/TLS) Denial of Service (DoS) Vulnerability (cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationCiscoAdaptive Security ApplianceAllAllAllAll
Hardware Device InfoCiscoAsa 5505-AllAllAll
Operating
System		CiscoAsa 5505 Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5505 Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5512-x-AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5515-x-AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5525-x-AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5545-x-AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5555-x-AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5580-AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.016\(001\)AllAllAll
Hardware Device InfoCiscoAsa 5585-x-AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.016\(001.025\)AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.016\(001\)AllAllAll
ApplicationCiscoFirepower Threat DefenseAllAllAllAll
  • cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5505_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5505_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5580_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5580_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\(001.025\):*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.016\(001\):*:*:*:*:*:*:*:
  • cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-34783 : A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Applianc… twitter.com/i/web/status/1… 2021-10-27 19:09:10
Twitter Icon @softek_jp Cisco ASA Software の SSL/TLS メッセージの処理にサービスを妨害される問題 (CVE-2021-34783) [40359] sid.softek.jp/content/show/4… #SIDfm #脆弱性情報 2021-10-28 07:30:49
Twitter Icon @GrupoICA_Ciber ?CISCO? Múltiples vulnerabilidades de severidad alta en productos CISCO: CVE-2021-34783,CVE-2021-34793,CVE-2021-3… twitter.com/i/web/status/1… 2021-10-30 07:56:33
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