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

CVE-2024-12747

Medium
5.6/10

Summary

A flaw was found in rsync. This vulnerability arises from a Race Condition during rsync's handling of symbolic links. Rsync's default behavior when encountering symbolic links is to skip them. If an attacker replaced a regular file with a symbolic link at the right time, it was possible to bypass the default behavior and traverse symbolic links. Depending on the privileges of the rsync process, an attacker could leak sensitive information, potentially leading to Privilege Escalation. The issue has been fixed in rsync version v3.4.0.

  • HIGH
  • LOCAL
  • NONE
  • CHANGED
  • NONE
  • LOW
  • HIGH
  • 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