Cisco IOS XR Software Secure Shell Authentication Vulnerability (Cisco Cisco IOS XR Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.19 % · percentile 68 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
A 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.
Weaknesses (CWE)
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 5.4 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | cisco |
| CVSS 3.1 | MEDIUM 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 5.4 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
| CVSS 2.0 | MEDIUM 5.5 | AV:N/AC:L/Au:S/C:P/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-10399
- GCVE · GCVE-0-2019-1842
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:ios_xr_firmware:6.1.2.tools:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr_firmware:6.1.3.tools:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr_firmware:6.2.3.tools:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr_firmware:6.4.2.tools:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco IOS XR Software | affected unspecified < 6.1.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |