Cisco Firepower Extensible Operating System/NX-OS AAA resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco Firepower Extensible Operating System and NX-OS. It has been classified as problematic. Affected by this vulnerability is an unknown functionality of the component AAA. This manipulation causes resource management. This vulnerability is registered as CVE-2017-3883. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco Firepower Extensible Operating System and NX-OS (Firewall Software) (unknown version). It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component AAA. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

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.

The bug was discovered 10/18/2017. The weakness was published 10/19/2017 with Cisco (Website). It is possible to read the advisory at securitytracker.com. This vulnerability is known as CVE-2017-3883 since 12/21/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 104177 (Cisco NX-OS System Software Authentication, Authorization, and Accounting Denial of Service Vulnerability Vulnerability), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316161 (Cisco NX-OS System Software Authentication, Authorization, and Accounting Denial of Service Vulnerability (cisco-sa-20171018-aaavty)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104177) and SecurityFocus (BID 101493†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104177
Nessus Name: Cisco NX-OS System Software Authentication, Authorization, and Accounting Denial of Service Vulnerability Vulnerability
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/21/2016 🔍
10/18/2017 +301 days 🔍
10/18/2017 +0 days 🔍
10/18/2017 +0 days 🔍
10/19/2017 +1 days 🔍
10/19/2017 +0 days 🔍
10/20/2017 +1 days 🔍
10/26/2017 +6 days 🔍
01/19/2021 +1181 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securitytracker.com⛔
Researcher: Cisco.
Organization: Cisco
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-3883 (🔍)
GCVE (CVE): GCVE-0-2017-3883
GCVE (VulDB): GCVE-100-108295
SecurityFocus: 101493 - Cisco FXOS and NX-OS System Software CVE-2017-3883 Denial of Service Vulnerability
SecurityTracker: 1039614

Entryinfo

Created: 10/20/2017 09:08
Updated: 01/19/2021 11:51
Changes: 10/20/2017 09:08 (67), 11/27/2019 08:38 (6), 01/19/2021 11:48 (2), 01/19/2021 11:51 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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