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Vulnerability CVE-2021-34781
Published: 2021-10-27
Description: |
A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to a lack of proper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, which causes a DoS condition on the affected device. The device must be manually reloaded to recover. |
Type:
CWE-755
CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:C)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
7.1/10 |
6.9/10 |
8.6/10 |
Exploit range |
Attack complexity |
Authentication |
Remote |
Medium |
No required |
Confidentiality impact |
Integrity impact |
Availability impact |
None |
None |
Complete |
References: |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-rUDseW3r
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