CVE-2019-1842

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Summary

CVECVE-2019-1842
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-06-05 17:29:00 UTC
Updated2020-10-16 15:41:00 UTC
DescriptionA vulnerability in the Secure Shell (SSH) authentication function of Cisco IOS XR Software could allow an authenticated, remote attacker to successfully log in to an affected device using two distinct usernames. The vulnerability is due to a logic error that may occur when certain sequences of actions are processed during an SSH login event on the affected device. An attacker could exploit this vulnerability by initiating an SSH session to the device with a specific sequence that presents the two usernames. A successful exploit could result in logging data misrepresentation, user enumeration, or, in certain circumstances, a command authorization bypass. See the Details section for more information.

Risk And Classification

Problem Types: CWE-287

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Crs-1 16-slot Line Card Chassis - All All All
Hardware Cisco Crs-1 16-slot Line Card Chassis - All All All
Hardware Cisco Crs-1 16-slot Single-shelf System - All All All
Hardware Cisco Crs-1 16-slot Single-shelf System - All All All
Hardware Cisco Crs-1 4-slot Single-shelf System - All All All
Hardware Cisco Crs-1 4-slot Single-shelf System - All All All
Hardware Cisco Crs-1 8-slot Line Card Chassis - All All All
Hardware Cisco Crs-1 8-slot Line Card Chassis - All All All
Hardware Cisco Crs-1 8-slot Single-shelf System - All All All
Hardware Cisco Crs-1 8-slot Single-shelf System - All All All
Hardware Cisco Crs-1 Fabric Card Chassis - All All All
Hardware Cisco Crs-1 Fabric Card Chassis - All All All
Hardware Cisco Crs-1 Line Card Chassis Dual - All All All
Hardware Cisco Crs-1 Line Card Chassis Multi - All All All
Hardware Cisco Crs-1 Line Card Chassis Dual - All All All
Hardware Cisco Crs-1 Line Card Chassis Dual - All All All
Hardware Cisco Crs-1 Line Card Chassis Multi - All All All
Hardware Cisco Crs-1 Line Card Chassis Multi - All All All
Hardware Cisco Crs-1 Multishelf System - All All All
Hardware Cisco Crs-1 Multishelf System - All All All
Hardware Cisco Crs-3 16-slot Single-shelf System - All All All
Hardware Cisco Crs-3 16-slot Single-shelf System - All All All
Hardware Cisco Crs-3 4-slot Single-shelf System - All All All
Hardware Cisco Crs-3 4-slot Single-shelf System - All All All
Hardware Cisco Crs-3 8-slot Single-shelf System - All All All
Hardware Cisco Crs-3 8-slot Single-shelf System - All All All
Hardware Cisco Crs-3 Multishelf System - All All All
Hardware Cisco Crs-3 Multishelf System - All All All
Hardware Cisco Crs-8/s-b Crs - All All All
Hardware Cisco Crs-8/scrs - All All All
Hardware Cisco Crs-8/s-b Crs - All All All
Hardware Cisco Crs-8/s-b Crs - All All All
Hardware Cisco Crs-8/scrs - All All All
Hardware Cisco Crs-8/scrs - All All All
Hardware Cisco Crs-x 16-slot Single-shelf System - All All All
Hardware Cisco Crs-x 16-slot Single-shelf System - All All All
Hardware Cisco Crs-x Multishelf System - All All All
Hardware Cisco Crs-x Multishelf System - All All All
Operating System Cisco Ios Xr Firmware 6.1.2.tools All All All
Operating System Cisco Ios Xr Firmware 6.1.3.tools All All All
Operating System Cisco Ios Xr Firmware 6.2.3.tools All All All
Operating System Cisco Ios Xr Firmware 6.4.2.tools All All All
Operating System Cisco Ios Xr Firmware 6.1.2.tools All All All
Operating System Cisco Ios Xr Firmware 6.1.3.tools All All All
Operating System Cisco Ios Xr Firmware 6.2.3.tools All All All
Operating System Cisco Ios Xr Firmware 6.4.2.tools All All All
Hardware Cisco Ncs 6008-8-slot Chassis - All All All
Hardware Cisco Ncs 6008-8-slot Chassis - All All All
Hardware Cisco Network Convergence System 5508 - All All All
Hardware Cisco Network Convergence System 5508 - All All All

References

ReferenceSourceLinkTags
Cisco IOS XR Software CVE-2019-1842 Unauthorized Access Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
Cisco IOS XR Software Secure Shell Authentication Vulnerability CISCO tools.cisco.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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