A vulnerability in the TCP normalizer of Cisco Adaptive Security Appliance (ASA) Software (8.0 through 8.7 and 9.0 through 9.6) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause Cisco ASA and FTD to drop any further incoming traffic on all interfaces, resulting in a denial of service (DoS) condition. The vulnerability is due to improper limitation of the global out-of-order TCP queue for specific block sizes. An attacker could exploit this vulnerability by sending a large number of unique permitted TCP connections with out-of-order segments. An exploit could allow the attacker to exhaust available blocks in the global out-of-order TCP queue, causing the dropping of any further incoming traffic on all interfaces and resulting in a DoS condition. Cisco Bug IDs: CSCvb46321.
No CVSS v3.1
Attack Vector Network
Attack Complexity High
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
User Interaction None
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
AV:N/AC:M/Au:N/C:N/I:N/A:P
| Vendors | Products |
|---|---|
| Cisco |
|
Configuration 1 [-]
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References
| Link | Resource |
|---|---|
| http://www.securityfocus.com/bid/97923 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1038329 | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: cisco
Published: 2017-04-20T22:00:00
Updated: 2017-07-10T09:57:01
Reserved: 2016-12-21T00:00:00
Link: CVE-2017-3793
JSON object: View
NVD Information
Status : Modified
Published: 2017-04-20T22:59:00.230
Modified: 2023-08-15T15:14:43.030
Link: CVE-2017-3793
JSON object: View
Redhat Information
No data.