CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

A vulnerability, which was classified as critical, has been found in Cisco IOS XR on NCS 6000 (Router Operating System) (the affected version is unknown). This issue affects an unknown code of the component Packet Timer. The manipulation with an unknown input leads to a resource management vulnerability (Leak). Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

Cisco IOS XR 5.x through 5.2.5 on NCS 6000 devices allows remote attackers to cause a denial of service (timer consumption and Route Processor reload) via crafted SSH traffic, aka Bug ID CSCux76819.

The weakness was shared 07/13/2016 with Cisco as cisco-sa-20160713-ncs6k / CSCux76819 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2016-1426 since 01/04/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

The vulnerability is due to improper management of system timer resources. An attacker could exploit this vulnerability by sending a number of Secure Shell (SSH), Secure Copy Protocol (SCP), and Secure FTP (SFTP) management connections to an affected device. An exploit could allow the attacker to cause a leak of system timer resources, leading to a nonoperational state and an eventual reload of the RP on the affected platform.

The vulnerability scanner Nessus provides a plugin with the ID 93563 (Cisco IOS XR NCS 6000 Packet Timer Leak DoS (cisco-sa-20160713-ncs6k)), 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 l.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (93563).

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XR

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Leak
Class: Resource management / Leak
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 93563
Nessus Name: Cisco IOS XR NCS 6000 Packet Timer Leak DoS (cisco-sa-20160713-ncs6k)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

01/04/2016 🔍
07/13/2016 +191 days 🔍
07/13/2016 +0 days 🔍
07/13/2016 +0 days 🔍
07/13/2016 +0 days 🔍
07/14/2016 +1 days 🔍
07/15/2016 +1 days 🔍
09/16/2016 +63 days 🔍
02/26/2019 +893 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20160713-ncs6k / CSCux76819
Organization: Cisco
Status: Confirmed

CVE: CVE-2016-1426 (🔍)
SecurityTracker: 1036295
SecurityFocus: 91748 - Cisco IOS XR CVE-2016-1426 Denial of Service Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 07/14/2016 10:51
Updated: 02/26/2019 19:08
Changes: 07/14/2016 10:51 (67), 02/26/2019 19:08 (12)
Complete: 🔍

Discussion

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