CVE-2021-41689: NULL Pointer Dereference

June 28, 2022 (updated July 6, 2022)

DCMTK through 3.6.6 does not handle string copy properly. Sending specific requests to the dcmqrdb program, it would query its database and copy the result even if the result is null, which can incur a head-based overflow. An attacker can use it to launch a DoS attack.

References

github.com/DCMTK/dcmtk
github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d
nvd.nist.gov/vuln/detail/CVE-2021-41689

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