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Unchecked Return Value

CVE-2021-34585

High
7.5/10

Summary

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation.

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

CWE-252 - Unchecked Return Value

The software does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.

References

Advisory Timeline

  • Published