Vulnerability Monitor

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CVE-2017-3793

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.0, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and limited availability for affected systems. Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-04-20T22:59:00.230

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 4.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-399
Type: Primary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	adaptive_security_appliance_software	8.0.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.2.11	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.2.15	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.3.12	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.3.19	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.16	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.25	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.28	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.31	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.32	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.4.33	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.20	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.25	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.27	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.28	Yes
Operating System	cisco	adaptive_security_appliance_software	8.0.5.31	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.0.104	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.15	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.16	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.19	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.24	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.49	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.50	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.55	Yes
Operating System	cisco	adaptive_security_appliance_software	8.1.2.56	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.0.45	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.1.11	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2.10	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2.12	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2.16	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.2.17	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.22	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.26	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.33	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.40	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.41	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.46	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.48	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.50	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.52	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.55	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.57	Yes
Operating System	cisco	adaptive_security_appliance_software	8.2.5.59	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.25	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.31	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.33	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.34	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.37	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.39	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.40	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.41	Yes
Operating System	cisco	adaptive_security_appliance_software	8.3.2.44	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.0	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.1.11	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.5.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.15	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.22	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.26	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.28	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.29	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.14	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.18	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.19	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.21	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.24	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.10	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.12	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.14	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.11	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.16	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.2.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.7	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.17	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.20	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.24	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.26	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.29	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.33	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.35	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.37	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.40	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.42	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)7	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)9	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)11	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)12	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.12	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.15	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.21	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(0.0\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(0.104\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(3.1\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.7	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.13	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.14	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.16	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.17	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(1.50\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(1.105\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(2.100\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(2.243\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.9	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.11	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.0.115	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.2.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.11	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.3.12	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.2.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.2.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.2.14	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.0	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.1.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.2.3	Yes

References

http://www.securityfocus.com/bid/97923 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1038329 ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/97923 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1038329 (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.