Cisco IOS XE up to 16.5 Line Card access control

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS XE up to 16.5. This affects an unknown part of the component Line Card. Performing a manipulation results in access control. This vulnerability is identified as CVE-2017-12239. The attack may be carried out on the physical device. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS XE up to 16.5 (Router Operating System). It has been classified as problematic. This affects an unknown functionality of the component Line Card. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in motherboard console ports of line cards for Cisco ASR 1000 Series Aggregation Services Routers and Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, physical attacker to access an affected device's operating system. The vulnerability exists because an engineering console port is available on the motherboard of the affected line cards. An attacker could exploit this vulnerability by physically connecting to the console port on the line card. A successful exploit could allow the attacker to gain full access to the affected device's operating system. This vulnerability affects only Cisco ASR 1000 Series Routers that have removable line cards and Cisco cBR-8 Converged Broadband Routers, if they are running certain Cisco IOS XE 3.16 through 16.5 releases. Cisco Bug IDs: CSCvc65866, CSCve77132.

The bug was discovered 09/27/2017. The weakness was released 09/29/2017 with Cisco (Website). The advisory is shared at securitytracker.com. This vulnerability is uniquely identified as CVE-2017-12239 since 08/03/2017. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 103702 (Cisco IOS XE Line Card Console Access Vulnerability (cisco-sa-20170927-cc)), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316157 (Cisco IOS XE Software Line Card Console Access Vulnerability (cisco-sa-20170927-cc)).

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

The vulnerability is also documented in the databases at Tenable (103702) and SecurityFocus (BID 101042†). Entry connected to this vulnerability is available at VDB-107238. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103702
Nessus Name: Cisco IOS XE Line Card Console Access Vulnerability (cisco-sa-20170927-cc)
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

08/03/2017 🔍
09/27/2017 +55 days 🔍
09/27/2017 +0 days 🔍
09/27/2017 +0 days 🔍
09/28/2017 +1 days 🔍
09/29/2017 +1 days 🔍
09/29/2017 +0 days 🔍
10/06/2017 +7 days 🔍
01/14/2021 +1196 days 🔍

Sourcesinfo

Vendor: cisco.com

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

CVE: CVE-2017-12239 (🔍)
GCVE (CVE): GCVE-0-2017-12239
GCVE (VulDB): GCVE-100-107241

OVAL: 🔍

SecurityFocus: 101042 - Multiple Cisco Products CVE-2017-12239 Local Unauthorized Access Vulnerability
SecurityTracker: 1039454

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

Entryinfo

Created: 09/29/2017 12:02
Updated: 01/14/2021 18:34
Changes: 09/29/2017 12:02 (70), 11/20/2019 13:29 (7), 01/14/2021 18:28 (2), 01/14/2021 18:34 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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