Vulnerability Details : CVE-2017-3883
A vulnerability in the authentication, authorization, and accounting (AAA) implementation of Cisco Firepower Extensible Operating System (FXOS) and NX-OS System Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability occurs because AAA processes prevent the NX-OS System Manager from receiving keepalive messages when an affected device receives a high rate of login attempts, such as in a brute-force login attack. System memory can run low on the FXOS devices under the same conditions, which could cause the AAA process to unexpectedly restart or cause the device to reload. An attacker could exploit this vulnerability by performing a brute-force login attack against a device that is configured with AAA security services. A successful exploit could allow the attacker to cause the affected device to reload. This vulnerability affects the following Cisco products if they are running Cisco FXOS or NX-OS System Software that is configured for AAA services: Firepower 4100 Series Next-Generation Firewall, Firepower 9300 Security Appliance, Multilayer Director Switches, Nexus 1000V Series Switches, Nexus 1100 Series Cloud Services Platforms, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, Unified Computing System (UCS) 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCuq58760, CSCuq71257, CSCur97432, CSCus05214, CSCux54898, CSCvc33141, CSCvd36971, CSCve03660.
Products affected by CVE-2017-3883
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:5.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:6.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:8.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:8.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:6.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:6.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:7.0\(3\)i3\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:7.1\(0.1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:2.5:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:3.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:3.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:3.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:fxos:2.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-3883
0.25%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 62 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-3883
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
8.6
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
3.9
|
4.0
|
NIST |
CWE ids for CVE-2017-3883
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-3883
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http://www.securityfocus.com/bid/101493
Cisco FXOS and NX-OS System Software CVE-2017-3883 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-aaavty
Cisco FXOS and NX-OS System Software Authentication, Authorization, and Accounting Denial of Service VulnerabilityVendor Advisory
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https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03846en_us
HPESBST03846 rev.1 - HPE StoreFabric C-Series Director and C-Series Fabric Switches, Remote Denial of Service
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http://www.securitytracker.com/id/1039614
Cisco NX-OS AAA Processing Flaw Lets Remote Users Cause the Target System to Reload - SecurityTrackerThird Party Advisory;VDB Entry
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