CVE-2021-41690: Missing Release of Memory after Effective Lifetime

June 28, 2022 (updated July 6, 2022)

DCMTK through 3.6.6 does not handle memory free properly. The malloced memory for storing all file information are recorded in a global variable LST and are not freed properly. Sending specific requests to the dcmqrdb program can incur a memory leak. An attacker can use it to launch a DoS attack.

References

github.com/DCMTK/dcmtk
github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb
nvd.nist.gov/vuln/detail/CVE-2021-41690

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