[Forgot Password]
Login  Register Subscribe

30389

 
 

423868

 
 

244625

 
 

909

 
 

193379

 
 

277

Paid content will be excluded from the download.


Download | Alert*
CCE
view XML

CCE-91975-3

Platform: cpe:/o:ubuntu:ubuntu_linux:16.04Date: (C)2018-07-09   (M)2023-07-04



There are several options available to limit which users and group can access the system via SSH. It is recommended that at least one of the following options be leveraged: AllowUsers The AllowUsers variable gives the system administrator the option of allowing specific users to ssh into the system. The list consists of comma separated user names. Numeric userIDs are not recognized with this variable. If a system administrator wants to restrict user access further by only allowing the allowed users to log in from a particular host, the entry can be specified in the form of user@host. AllowGroups The AllowGroups variable gives the system administrator the option of allowing specific groups of users to ssh into the system. The list consists of comma separated user names. Numeric groupIDs are not recognized with this variable. DenyUsers The DenyUsers variable gives the system administrator the option of denying specific users to ssh into the system. The list consists of comma separated user names. Numeric userIDs are not recognized with this variable. If a system administrator wants to restrict user access further by specifically denying a users access from a particular host, the entry can be specified in the form of user@host. DenyGroups The DenyGroups variable gives the system administrator the option of denying specific groups of users to ssh into the system. The list consists of comma separated group names. Numeric groupIDs are not recognized with this variable. Rationale: Restricting which users can remotely access the system via SSH will help ensure that only authorized users access the system.


Parameter:

[user list separated by space]


Technical Mechanism:

Edit the /etc/ssh/sshd_config file to set one or more of the parameter as follows: AllowUsers userlist AllowGroups grouplist DenyUsers userlist DenyGroups grouplist

CCSS Severity:CCSS Metrics:
CCSS Score : 9.8Attack Vector: NETWORK
Exploit Score: 3.9Attack Complexity: LOW
Impact Score: 5.9Privileges Required: NONE
Severity: CRITICALUser Interaction: NONE
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScope: UNCHANGED
 Confidentiality: HIGH
 Integrity: HIGH
 Availability: HIGH
  

References:
Resource IdReference
SCAP Repo OVAL Definitionoval:org.secpod.oval:def:46236


OVAL    1
oval:org.secpod.oval:def:46236
XCCDF    1
xccdf_org.secpod_benchmark_general_Ubuntu_16_04

© SecPod Technologies