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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
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.
Source: MITRE View Analysis Description
Source: MITRE
Base Score: 4.0 MEDIUM Vector: AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L (V3 legend) Impact Score: 1.4 Exploitability Score: 2.2
Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None Scope (S): Changed Confidentiality (C): None Integrity (I): None Availability (A): Low
Base Score: 4.3 MEDIUM Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P) (V2 legend) Impact Subscore: 2.9 Exploitability Subscore: 8.6
Access Vector (AV): Network Access Complexity (AC): Medium Authentication (AU): None Confidentiality (C): None Integrity (I): None Availability (A): Partial Additional Information: Allows disruption of service
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Vulnerability Type (View All)
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.12:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)12:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.11:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)11:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.9:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)9:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.7:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)7:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.6:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)6:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.4:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)4:*:*:*:*:*:*:*
http://www.securitytracker.com/id/1038329 [No Types Assigned]
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.1.2:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.2:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.2.11:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.2.15:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.3:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:8.0.3.6:*:*:*:*:*:*:* *cpe:2.3
(AV:N/AC:M/Au:N/C:N/I:N/A:P)
AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
CWE-399
http://www.securityfocus.com/bid/97923 No Types Assigned
http://www.securityfocus.com/bid/97923 Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm No Types Assigned
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm Vendor Advisory
http://www.securityfocus.com/bid/97923 [No Types Assigned]