Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Firepower Extensible Operating System | <= 2.3 |
| Cisco | Firepower 4100 | - |
| Cisco | Fxos | 2.3 |
| Cisco | Firepower 9300 | - |
| Cisco | Nx-Os | 5.2 |
| Cisco | Mds 9000 | - |
| Cisco | Nexus 1000V | - |
| Cisco | Nexus 1100V | - |
| Cisco | Nexus 3000 | - |
| Cisco | Nexus 3016 | - |
| Cisco | Nexus 3016Q | - |
| Cisco | Nexus 3048 | - |
| Cisco | Nexus 3064 | - |
| Cisco | Nexus 3064T | - |
| Cisco | Nexus 3064X | - |
| Cisco | Nexus 3500 | - |
| Cisco | Nexus 3524 | - |
| Cisco | Nexus 3548 | - |
| Cisco | Nexus 2000 | - |
| Cisco | Nexus 5000 | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/101493Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039614Third Party AdvisoryVDB Entry
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpe
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://www.securityfocus.com/bid/101493Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039614Third Party AdvisoryVDB Entry
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpe
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2017-3883?
CVE-2017-3883 is a vulnerability with a CVSS score of 8.6 (HIGH). 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...
How severe is CVE-2017-3883?
CVE-2017-3883 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-3883?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Firepower Extensible Operating System, Cisco Firepower 4100, Cisco Fxos, Cisco Firepower 9300, Cisco Nx-Os.