Vulnerability Summary for CVE-2016-1366

Original release date: 03/24/2016

Last revised: 03/25/2016

Source: US-CERT/NIST

Overview

The SCP and SFTP modules in Cisco IOS XR 5.0.0 through 5.2.5 on Network Convergence System 6000 devices use weak permissions for system files, which allows remote authenticated users to cause a denial of service (overwrite) via unspecified vectors, aka Bug ID CSCuw75848.

Impact

CVSS Severity (version 3.0):

CVSS v3 Base Score: 6.5 Medium

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 2.8

CVSS Version 3 Metrics:

Attack Vector (AV): Network

Attack Complexity (AC): Low

Privileges Required (PR): Low

User Interaction (UI): None

Scope (S): Unchanged

Confidentiality (C): None

Integrity (I): High

Availability (A): None

CVSS Severity (version 2.0):

CVSS v2 Base Score: 6.8 MEDIUM

Vector: (AV:N/AC:L/Au:S/C:N/I:C/A:N) (legend)

Impact Subscore: 6.9

Exploitability Subscore: 8.0

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Low

Authentication: Required to exploit

Impact Type: Allows unauthorized modification

References to Advisories, Solutions, and Tools

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External Source: CISCO

Name: 20160323 Cisco Network Convergence System 6000 Series Routers SCP and SFTP Modules Denial of Service Vulnerability

Type: Advisory

Hyperlink: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-ncs

Vulnerable software and versions

+ Configuration 1+ OR* cpe:/o:cisco:ios_xr:5.2.4* cpe:/o:cisco:ios_xr:5.2.5* cpe:/o:cisco:ios_xr:5.2.3* cpe:/o:cisco:ios_xr:5.2.1* cpe:/o:cisco:ios_xr:5.0.1* cpe:/o:cisco:ios_xr:5.0.0

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)

Permissions, Privileges, and Access Control (CWE-264)

CVE Standard Vulnerability Entry http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1366