8.6

CVE-2021-34783

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.

Data is provided by the National Vulnerability Database (NVD)
Cisco ≫ Firepower Threat Defense Version >= 6.4.0 < 6.4.0.13
Cisco ≫ Firepower Threat Defense Version >= 6.6.0 < 6.6.5
Cisco ≫ Firepower Threat Defense Version >= 6.7.0 < 6.7.0.3
Cisco ≫ Firepower Threat Defense Version >= 7.0.0 < 7.0.1
Cisco ≫ Adaptive Security Appliance Software Version >= 9.8.0 < 9.8.4.40
Cisco ≫ Adaptive Security Appliance Software Version >= 9.12.0 < 9.12.4.29
Cisco ≫ Adaptive Security Appliance Software Version >= 9.14.0 < 9.14.3.9
Cisco ≫ Adaptive Security Appliance Software Version >= 9.15.0 < 9.15.1.17
Cisco ≫ Adaptive Security Appliance Software Version >= 9.16.0 < 9.16.2
Cisco ≫ Asa 5512-x Firmware Version009.016(001)
   Cisco ≫ Asa 5512-x Version-
Cisco ≫ Asa 5512-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5512-x Version-
Cisco ≫ Asa 5505 Firmware Version009.016(001)
   Cisco ≫ Asa 5505 Version-
Cisco ≫ Asa 5505 Firmware Version009.016(001.025)
   Cisco ≫ Asa 5505 Version-
Cisco ≫ Asa 5515-x Firmware Version009.016(001)
   Cisco ≫ Asa 5515-x Version-
Cisco ≫ Asa 5515-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5515-x Version-
Cisco ≫ Asa 5525-x Firmware Version009.016(001)
   Cisco ≫ Asa 5525-x Version-
Cisco ≫ Asa 5525-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5525-x Version-
Cisco ≫ Asa 5545-x Firmware Version009.016(001)
   Cisco ≫ Asa 5545-x Version-
Cisco ≫ Asa 5545-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5545-x Version-
Cisco ≫ Asa 5555-x Firmware Version009.016(001)
   Cisco ≫ Asa 5555-x Version-
Cisco ≫ Asa 5555-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5555-x Version-
Cisco ≫ Asa 5580 Firmware Version009.016(001)
   Cisco ≫ Asa 5580 Version-
Cisco ≫ Asa 5580 Firmware Version009.016(001.025)
   Cisco ≫ Asa 5580 Version-
Cisco ≫ Asa 5585-x Firmware Version009.016(001)
   Cisco ≫ Asa 5585-x Version-
Cisco ≫ Asa 5585-x Firmware Version009.016(001.025)
   Cisco ≫ Asa 5585-x Version-
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.77% 0.726
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 7.8 10 6.9
AV:N/AC:L/Au:N/C:N/I:N/A:C
psirt@cisco.com 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.