Cisco NX-OS TACACS+ Command input validation

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Cisco NX-OS. This affects an unknown function of the component TACACS+ Command Handler. The manipulation results in input validation. This vulnerability is known as CVE-2014-8013. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco NX-OS (Router Operating System) (affected version unknown). It has been classified as problematic. Affected is an unknown functionality of the component TACACS+ Command Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The TACACS+ command-authorization implementation in Cisco NX-OS allows local users to cause a denial of service (device reload) via a long CLI command, aka Bug ID CSCur54182.

The weakness was published 01/30/2015 with Cisco as CSCur54182 as confirmed security notice (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2014-8013 since 10/08/2014. The attack needs to be approached locally. The successful exploitation needs a authentication. There are neither technical details nor an exploit publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 43462 (Cisco NX-OS Software TACACS+ Command Authorization Vulnerability (Cisco-SA-20150202-CVE-2014-8013)).

Upgrading eliminates this vulnerability. The security notice contains the following remark:

We should not enable remote authorization using TACACS for long commands ( >; 255).

The vulnerability is also documented in the databases at SecurityFocus (BID 72393†), SecurityTracker (ID 1031685†) and Vulnerability Center (SBV-48639†). Further details are available at tools.cisco.com. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103402
OpenVAS Name: Cisco NX-OS Software TACACS+ Command Authorization Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/08/2014 🔍
01/30/2015 +114 days 🔍
01/30/2015 +0 days 🔍
01/30/2015 +0 days 🔍
02/01/2015 +2 days 🔍
02/02/2015 +1 days 🔍
02/03/2015 +1 days 🔍
02/15/2015 +12 days 🔍
06/20/2017 +856 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCur54182
Organization: Cisco
Status: Confirmed

CVE: CVE-2014-8013 (🔍)
GCVE (CVE): GCVE-0-2014-8013
GCVE (VulDB): GCVE-100-69000
SecurityFocus: 72393 - Cisco NX-OS Software CVE-2014-8013 Local Denial of Service Vulnerability
SecurityTracker: 1031685 - Cisco NX-OS TACACS+ Command Processing Flaw Lets Local Users Deny Service
Vulnerability Center: 48639 - Cisco NX-OS Local DoS via Long CLI Commands in TACACS+, Medium

Misc.: 🔍

Entryinfo

Created: 02/02/2015 12:19
Updated: 06/20/2017 08:31
Changes: 02/02/2015 12:19 (66), 06/20/2017 08:31 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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