CVE-2017-3793
Summary
| CVE | CVE-2017-3793 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-04-20 22:59:00 UTC |
| Updated | 2025-04-20 01:37:25 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.0 4 MEDIUM from [email protected]
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
Problem Types: CWE-399 | CWE-400 | CWE-399 CWE-399
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 4 | MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L |
| 2.0 | [email protected] | Primary | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
NoneIntegrity
NoneAvailability
LowCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:M/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | Cisco ASA Software And Cisco FTD Software | affected Cisco ASA Software and Cisco FTD Software | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco ASA Software and FTD Software CVE-2017-3793 Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Third Party Advisory, VDB Entry |
| Cisco ASA Software and Cisco FTD Software TCP Normalizer Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| Cisco ASA TCP Normalizer Flaw Lets Remote Users Deny Service - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.