Bug 2295273 (CVE-2024-39894)

Summary:	CVE-2024-39894 openssh: Logic error in ObscureKeystrokeTiming
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	adudiak, irisswanson52, kshier, omaciel, stcannon, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2295615
Bug Blocks:

Description OSIDB Bzimport 2024-07-02 20:31:36 UTC

OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.

Comment 3 Fanny Moen 2025-05-07 02:25:40 UTC

A new low-severity Linux vulnerability (CVE-2024-39894) is being addressed by the security team and is related to other issues.

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