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Rewterz Threat Advisory – Microsoft Windows Server 2019 Multiple Vulnerabilities
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Rewterz Threat Advisory – CVE-2018-8256 & CVE-2018-8415 – Windows PowerShell Multiple Vulnerabilities

Multiple vulnerabilities in Windows PowerShell can be exploited to bypass logging restrictions and execute arbitrary code.

 

 

IMPACT:  NORMAL

 

 

PUBLISH DATE:  11-14-2018

 

 

OVERVIEW

 

 

Multiple vulnerabilities have been reported in Windows PowerShell. By successfully exploiting them, malicious local users can bypass certain security restrictions. Malicious people may also compromise a vulnerable system. Updated versions are available.

 

 

ANALYSIS

 

 

The “ExpandArchive()” function contains an error when handling files. If exploited successfully, it will allow malicious people to execute arbitrary code.

 

 

Another error related to log management when handling special characters can be exploited to bypass logging restrictions and subsequently execute unlogged code.

 

 

AFFECTED PRODUCTS

 

 

Windows PowerShell 6.x

 

  • versions 6.0 prior to 6.0.5
  • 1 prior to 6.1.1
  • 2

 

 

UPDATES

 

 

Update to a fixed version if available.

 

  • Versions 6.0:

Update to version 6.0.5.

 

 

  • Versions 6.1:

Update to version 6.1.1.

 

 

  • Versions 6.2:

Fixed in the source code repository.

 

 

If you think you’re the victim of a cyber-attack, immediately send an email to soc@rewterz.com.