CVE-2021-41688: Double Free

June 28, 2022 (updated July 6, 2022)

DCMTK through 3.6.6 does not handle memory free properly. The object in the program is free but its address is still used in other locations. Sending specific requests to the dcmqrdb program will incur a double free. 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-2021-41688

Code Behaviors & Features

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