CVE-2014-9278

openssh: ~/.k5users unexpectedly grants remote login

Severity Score

4.0

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The OpenSSH server, as used in Fedora and Red Hat Enterprise Linux 7 and when running in a Kerberos environment, allows remote authenticated users to log in as another user when they are listed in the .k5users file of that user, which might bypass intended authentication requirements that would force a local login.

El servidor OpenSSH, utilizado en Fedora y Red Hat Enterprise Linux 7 y cuando funciona en un entorno Kerberos, permite a usuarios remotos autenticados iniciar sesión como otro usuario cuando están listados en el fichero .k5users de ese usuario, lo que podría evadir los requisitos de autenticación que forzaría un inicio de sesión local.

It was found that when OpenSSH was used in a Kerberos environment, remote authenticated users were allowed to log in as a different user if they were listed in the ~/.k5users file of that user, potentially bypassing intended authentication restrictions.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2014-12-04 CVE Reserved
2014-12-06 CVE Published
2024-07-18 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (9)

URL	Tag	Source
http://thread.gmane.org/gmane.comp.encryption.kerberos.general/15855	X_refsource_misc
http://www.openwall.com/lists/oss-security/2014/12/02/3	Mailing List
http://www.openwall.com/lists/oss-security/2014/12/04/17	Mailing List
http://www.securityfocus.com/bid/71420	Vdb Entry
https://bugzilla.mindrot.org/show_bug.cgi?id=1867	X_refsource_confirm
https://exchange.xforce.ibmcloud.com/vulnerabilities/99090	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2015-0425.html	2017-09-08
https://bugzilla.redhat.com/show_bug.cgi?id=1169843	2015-03-05
https://access.redhat.com/security/cve/CVE-2014-9278	2015-03-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openbsd Search vendor "Openbsd"	Openssh Search vendor "Openbsd" for product "Openssh"	-	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"	-	Safe
Openbsd Search vendor "Openbsd"	Openssh Search vendor "Openbsd" for product "Openssh"	-	-	Affected	in	Redhat Search vendor "Redhat"	Fedora Search vendor "Redhat" for product "Fedora"	7 Search vendor "Redhat" for product "Fedora" and version "7"	-	Safe