CVE-2024-39894

2024-07-0316:27:00

redhat.com

access.redhat.com

openssh 9.5-9.7

obscurekeystroketiming

timing attacks

sudo

keystroke entry

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

Percentile

10.7%

JSON

A flaw was found in OpenSSH. A logic error in the SSH ObscureKeystrokeTiming feature (on by default) rendered this feature ineffective. A passive observer could still detect which network packets contained real keystrokes when the countermeasure was active because fake and real keystroke packets were being sent unconditionally.