Microsoft .NET Framework CVE-2018-8421 Remote Code Execution Vulnerability

2018-09-11T00:00:00
ID SMNTC-105222
Type symantec
Reporter Symantec Security Response
Modified 2018-09-11T00:00:00

Description

Description

Microsoft .NET Framework is prone to a remote code-execution vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the affected system. Failed exploit attempts will result in denial-of-service conditions.

Technologies Affected

  • Microsoft .NET Framework 2.0 SP2
  • Microsoft .NET Framework 3.0 SP2
  • Microsoft .NET Framework 3.5
  • Microsoft .NET Framework 3.5.1
  • Microsoft .NET Framework 4.5.2
  • Microsoft .NET Framework 4.6
  • Microsoft .NET Framework 4.6.1
  • Microsoft .NET Framework 4.6.2
  • Microsoft .NET Framework 4.7
  • Microsoft .NET Framework 4.7.1
  • Microsoft .NET Framework 4.7.2

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Implement multiple redundant layers of security.
Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.

Updates are available. Please see the references or vendor advisory for more information.