CVE-2021-41687: 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 program malloc a heap memory for parsing data, but does not free it when error in parsing. Sending specific requests to the dcmqrdb program incur the 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-2021-41687

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