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Use After Free


Severity High
Score 9.8/10


A vulnerability was found in Exim prior to exim-4.97-RC0 and classified as problematic. This issue affects the function "dmarc_dns_lookup" of the file "dmarc.c" of the component DMARC Handler. The manipulation leads to Use After Free. The attack may be initiated remotely. The associated identifier of this vulnerability is VDB-211919. NOTE: The affected package is not available in a package manager we support.

  • LOW
  • HIGH
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-416 - Use After Free

Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.


Advisory Timeline

  • Published