Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Comments
New Exploit for Microsoft Excel Power Query
Newest First  |  Oldest First  |  Threaded View
tdsan
50%
50%
tdsan,
User Rank: Ninja
6/30/2019 | 2:57:58 PM
Re: More often then not
Yep, there is actually an aspect of Linux that a number of professionals don't use, it is called SeLinux Policies. This works very well from the filesystem, bin files, and application exploitation.

This something the IT Security consultant should be aware and knowledgeable as well - https://web.mit.edu/rhel-doc/5/RHEL-5-manual/Deployment_Guide-en-US/rhlcommon-chapter-0001.html
Quote - The SELinux policy defines various rules which determine how each domain may access each type. Only what is specifically allowed by the rules is permitted. By default, every operation is denied and audited, meaning it is logged in the $AUDIT_LOG file. In Red Hat Enterprise Linux, this is set to /var/log/messages. The policy is compiled into binary format for loading into the kernel security server, and each time the security server makes a decision, it is cached in the AVC to optimize performance.

Auditing at the filesystem, file execution and kernel layer. In addition, if a file entered into the filesystem, this would be identified and not allowed to process because it is not part of the SeLinux profile.

Todd
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
6/30/2019 | 7:58:34 AM
Re: More often then not
Yes definitely get the point and concur 100%. Thanks for the inclusion of Linux based variants. It adds the juxtaposing perspective to this situation.
tdsan
50%
50%
tdsan,
User Rank: Ninja
6/28/2019 | 9:23:29 PM
Re: More often then not

More often then not, I notice that organizations are wrapped up in patching for vulnerabilities but not so adamant about system hardening. Items relating to locking down applications through GPO. This would definitely fall under that category.

Excellent, I agree with you from this point. I do think this is good from a Windows standpoint (GPOs are the way to go along with implementing SIEM, NGFW (Next Generation Firewalls, Micro-Segmentation):
  • Sample code written using PowerShell/Json to address some of the security issues associated with Windows (this is an example that can be pushed out to machines as well, GPOs are more efficient, this will help with one offs)
    Write-Host " "
    Write-Host "LSA Registry Entries"
    Write-Host "--------------------"
    Write-Host " "
    
    $lsa = '{"registry":[
        {"Entry":"auditbaseobjects", "Value":"1", "Type":"Dword"},
        {"Entry":"auditbasedirectories", "Value":"1", "Type":"Dword"},
        {"Entry":"LmCompatibilityLevel", "Value":"4", "Type":"Dword"},
        {"Entry":"restrictanonymous", "Value":"1", "Type":"Dword"},
        {"Entry":"restrictanonymoussam", "Value":"1", "Type":"Dword"},
        {"Entry":"LimitBlankPasswordUse", "Value":"1", "Type":"Dword"},
        {"Entry":"SecureBoot", "Value":"1", "Type":"Dword"}
    ]}'
    
    $path = "HKLM:\System\CurrentControlSet\Control\Lsa"
    $regobj = ConvertFrom-Json -InputObject $lsa
    $regobjects = $regobj.registry
    
    foreach ( $i in $regobjects ) {
        $val = Get-ItemPropertyValue -Path $path -Name $i.Entry -ErrorAction SilentlyContinue
        if ( (Test-Path $path) -and ($i.Value -eq $val ) ) {
            Write-Host $i.Entry "registry value - ok"
        } else {
            #New-Item -path $path -Name $i.Entry -Value $i.Value -Type Dword
            $chg = Set-ItemProperty -Path $path -Name $i.Entry -Value $i.Value -Type $i.Type -Force
            $names = Get-ItemPropertyValue -Path $path -Name $i.Entry
            Write-Host $i.Entry "modified registry entry: " $names
        }
    }

 

Linux security concepts to address some of the IT security issues (these are just examples but it is good to know)
  • Libre Office needs to be reviewed to see if the same vulnerabilities exist (when editing an excel spreadsheet)
  • Remove unused accounts (Windows & Linux)
  • Configure SELinux policies to check filesystem and executables (binaries)
  • Configure iptables and chains, ufw helps with this process
  • Encrypt /home/* folders and other necessary files
  • Enable IPv6 to be the primary protocol used over the Internet (IPSec VPN AES256)
  • Use logwatch to view the logs on the system and send notifications daily or weekly
  • Email - use pgp as part of the email security solution - https://bit.ly/2LoOxta
  • Create PEM keys to allow for secured access to ssh with authorized _keys file
  • Reduce the number of running applications, uninstall unnecessary applications
  • Create a gold-standard of the OS where Puppet/Chef/Satellite Server can help with the updates
  • Configure crontab to schedule updates to the system
  • Implement NMS & Security system to monitor the internal workings and log files
  • Install chkrootkit & rkhunter trojan tools
  • Ensure continuous monitoring tools are running to address any cyber-shortcomings
  • Enable SIEM, ML, AV, and training to thwart potential threats or vulnerabilities

There are other steps that I have left out but this was off the top of my head.

I think you get the point.

Todd
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
6/28/2019 | 9:44:17 AM
More often then not
More often then not, I notice that organizations are wrapped up in patching for vulnerabilities but not so adamant about system hardening. Items relating to locking down applications through GPO. This would definitely fall under that category.


Overcoming the Challenge of Shorter Certificate Lifespans
Mike Cooper, Founder & CEO of Revocent,  10/15/2020
US Counterintelligence Director & Fmr. Europol Leader Talk Election Security
Kelly Sheridan, Staff Editor, Dark Reading,  10/16/2020
7 Tips for Choosing Security Metrics That Matter
Ericka Chickowski, Contributing Writer,  10/19/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-9417
PUBLISHED: 2020-10-20
The Transaction Insight reporting component of TIBCO Software Inc.'s TIBCO Foresight Archive and Retrieval System, TIBCO Foresight Archive and Retrieval System Healthcare Edition, TIBCO Foresight Operational Monitor, TIBCO Foresight Operational Monitor Healthcare Edition, TIBCO Foresight Transaction...
CVE-2020-15264
PUBLISHED: 2020-10-20
The Boxstarter installer before version 2.13.0 configures C:\ProgramData\Boxstarter to be in the system-wide PATH environment variable. However, this directory is writable by normal, unprivileged users. To exploit the vulnerability, place a DLL in this directory that a privileged service is looking ...
CVE-2020-15269
PUBLISHED: 2020-10-20
In Spree before versions 3.7.11, 4.0.4, or 4.1.11, expired user tokens could be used to access Storefront API v2 endpoints. The issue is patched in versions 3.7.11, 4.0.4 and 4.1.11. A workaround without upgrading is described in the linked advisory.
CVE-2019-9080
PUBLISHED: 2020-10-20
DomainMOD before 4.14.0 uses MD5 without a salt for password storage.
CVE-2020-15931
PUBLISHED: 2020-10-20
Netwrix Account Lockout Examiner before 5.1 allows remote attackers to capture the Net-NTLMv1/v2 authentication challenge hash of the Domain Administrator (that is configured within the product in its installation state) by generating a single Kerberos Pre-Authentication Failed (ID 4771) event on a ...