Skip to main content

Improper Control of Generation of Code ('Code Injection')

CVE-2021-26701

High
9.8/10

Summary

A remote code execution vulnerability exists in .NET 5 and .NET Core due to how text encoding is performed. This CVE ID differs from CVE-2021-24112. This issue affects the package System.Text.Encodings.Web versions 4.0.0-beta-23409 through 4.5.0, 4.6.0-preview.18571.3 through 4.7.1, and 5.0.0-preview.1.20120.5 through 5.0.0.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-94 - Code Injection

Code injection is a type of vulnerability that allows an attacker to execute arbitrary code. This vulnerability fully compromises the machine and can cause a wide variety of security issues, such as unauthorized access to sensitive information, manipulation of data, denial of service attacks etc. Code injection is different from command injection in the fact that it is limited by the functionality of the injected language (e.g. PHP), as opposed to command injection, which leverages existing code to execute commands, usually within the context of a shell.

References

Advisory Timeline

  • Published