CVE-2019-16027 : A vulnerability in the implementation of the Intermediate System–to

A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition in the IS–IS process. The vulnerability is due to improper handling of a Simple Network Management Protocol (SNMP) request for specific Object Identifiers (OIDs) by the IS–IS process. An attacker could exploit this vulnerability by sending a crafted SNMP request to the affected device. A successful exploit could allow the attacker to cause a DoS condition in the IS–IS process.

Published 2020-01-26 05:15:17

Updated 2022-05-12 18:09:56

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Input validationDenial of service

Products affected by CVE-2019-16027

Cisco » Ios Xr » Version: 4.3.2
cpe:2.3:o:cisco:ios_xr:4.3.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Xr 12404 » Version: N/A
When used together with: Cisco » Xr 12406 » Version: N/A
When used together with: Cisco » Xr 12410 » Version: N/A
When used together with: Cisco » Xr 12416 » Version: N/A
Cisco » Ios Xr » Version: 5.2.5
cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.1.2
cpe:2.3:o:cisco:ios_xr:6.1.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Asr 9000 » Version: N/A
When used together with: Cisco » Asr 9000v » Version: V2
When used together with: Cisco » Asr 9001 » Version: N/A
When used together with: Cisco » Asr 9006 » Version: N/A
When used together with: Cisco » Asr 9010 » Version: N/A
When used together with: Cisco » Asr 9901 » Version: N/A
When used together with: Cisco » Asr 9903 » Version: N/A
When used together with: Cisco » Asr 9904 » Version: N/A
When used together with: Cisco » Asr 9906 » Version: N/A
When used together with: Cisco » Asr 9910 » Version: N/A
When used together with: Cisco » Asr 9912 » Version: N/A
When used together with: Cisco » Asr 9920 » Version: N/A
When used together with: Cisco » Asr 9922 » Version: N/A
Cisco » Ios Xr » Version: 6.1.3
cpe:2.3:o:cisco:ios_xr:6.1.3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5001 » Version: N/A
When used together with: Cisco » Ncs 5002 » Version: N/A
When used together with: Cisco » Ncs 5011 » Version: N/A
Cisco » Ios Xr » Version: 6.3.2
cpe:2.3:o:cisco:ios_xr:6.3.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Asr 9000 » Version: N/A
When used together with: Cisco » Asr 9000v » Version: V2
When used together with: Cisco » Asr 9001 » Version: N/A
When used together with: Cisco » Asr 9006 » Version: N/A
When used together with: Cisco » Asr 9010 » Version: N/A
When used together with: Cisco » Asr 9901 » Version: N/A
When used together with: Cisco » Asr 9903 » Version: N/A
When used together with: Cisco » Asr 9904 » Version: N/A
When used together with: Cisco » Asr 9906 » Version: N/A
When used together with: Cisco » Asr 9910 » Version: N/A
When used together with: Cisco » Asr 9912 » Version: N/A
When used together with: Cisco » Asr 9920 » Version: N/A
When used together with: Cisco » Asr 9922 » Version: N/A
Cisco » Ios Xr » Version: 6.2.2
cpe:2.3:o:cisco:ios_xr:6.2.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.1.4
cpe:2.3:o:cisco:ios_xr:6.1.4:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5001 » Version: N/A
When used together with: Cisco » Ncs 5002 » Version: N/A
When used together with: Cisco » Ncs 5011 » Version: N/A
Cisco » Ios Xr » Version: 6.2.3
cpe:2.3:o:cisco:ios_xr:6.2.3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.6.1
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5500 » Version: N/A
When used together with: Cisco » Ncs 5501 » Version: N/A
When used together with: Cisco » Ncs 5502 » Version: N/A
When used together with: Cisco » Ncs 5508 » Version: N/A
When used together with: Cisco » Ncs 5516 » Version: N/A
Cisco » Ios Xr » Version: 6.6.2
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Xrv 9000 » Version: N/A
Cisco » Ios Xr » Version: 6.6.25
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5500 » Version: N/A
When used together with: Cisco » Ncs 5501 » Version: N/A
When used together with: Cisco » Ncs 5502 » Version: N/A
When used together with: Cisco » Ncs 5508 » Version: N/A
When used together with: Cisco » Ncs 5516 » Version: N/A
Cisco » Ios Xr » Version: 6.5.2
cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5001 » Version: N/A
When used together with: Cisco » Ncs 5002 » Version: N/A
When used together with: Cisco » Ncs 5011 » Version: N/A
Cisco » Ios Xr » Version: 6.5.3
cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5001 » Version: N/A
When used together with: Cisco » Ncs 5002 » Version: N/A
When used together with: Cisco » Ncs 5011 » Version: N/A
Cisco » Ios Xr » Version: 6.4.2
cpe:2.3:o:cisco:ios_xr:6.4.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.3.3
cpe:2.3:o:cisco:ios_xr:6.3.3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.2.25
cpe:2.3:o:cisco:ios_xr:6.2.25:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
When used together with: Cisco » Ncs 6008 » Version: N/A
Cisco » Ios Xr » Version: 6.3.15
cpe:2.3:o:cisco:ios_xr:6.3.15:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5500 » Version: N/A
When used together with: Cisco » Ncs 5501 » Version: N/A
When used together with: Cisco » Ncs 5502 » Version: N/A
When used together with: Cisco » Ncs 5508 » Version: N/A
When used together with: Cisco » Ncs 5516 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2019-16027

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 41 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-16027

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.0	MEDIUM	AV:N/AC:L/Au:S/C:N/I:N/A:P	8.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.7	HIGH	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H	3.1	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	2.8	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2019-16027

CWE-20 Improper Input Validation

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.
Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)

References for CVE-2019-16027

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos

Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnerability
Vendor Advisory

Jump to

Vulnerability Details : CVE-2019-16027

Products affected by CVE-2019-16027

Exploit prediction scoring system (EPSS) score for CVE-2019-16027

CVSS scores for CVE-2019-16027

CWE ids for CVE-2019-16027

References for CVE-2019-16027