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Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVE-2021-29948

Low
2.5/10

Summary

Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. This vulnerability affects Thunderbird < 78.10.

  • HIGH
  • LOCAL
  • LOW
  • UNCHANGED
  • NONE
  • LOW
  • NONE
  • NONE

CWE-362 - Race Condition

A race condition occurs in a shared memory program when two threads/processes access the same shared memory data, and at least one thread executes a write operation. This vulnerability manipulates the time to check vs. time to use (TOC/TOU) gap between the threads in the critical section to cause disorientation in the shared data. The impact can vary from compromising the confidentiality of the system to causing the system to crash or to execute arbitrary code.

References

Advisory Timeline

  • Published