CVEvulnerability

CVE-2019-1842

5.4 MEDIUM Published 2019-06-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-06-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 3.0 ([email protected])
5.4 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0 ([email protected])
5.5 MEDIUM — AV:N/AC:L/Au:S/C:P/I:P/A:N
Weaknesses
CWE-285, CWE-287

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.

Affected configurations

• cisco ios xr firmware 6.1.2.tools • cisco ios xr firmware 6.1.3.tools • cisco ios xr firmware 6.2.3.tools • cisco ios xr firmware 6.4.2.tools

Related

Weakness · CWE (2)

  • CWE-285 Improper Authorization weakness
  • CWE-287 Improper Authentication weakness

References