CVE-2021-41689: Null Pointer Dereference
First published: Tue Jun 28 2022(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/dcmtk | <=3.6.5-1 | 3.6.7-9~deb12u1 3.6.8-6 |
| DCMTK | <=3.6.6 |
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Reference Links
- https://github.com/DCMTK/dcmtk
- https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d
- https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41689
- https://nvd.nist.gov/vuln/detail/CVE-2021-41689
- https://launchpad.net/bugs/cve/CVE-2021-41689
- https://security-tracker.debian.org/tracker/CVE-2021-41689
- https://ubuntu.com/security/CVE-2021-41689
Frequently Asked Questions
What is the severity of CVE-2021-41689?
CVE-2021-41689 has a medium severity rating as it can lead to a Denial of Service (DoS) attack.
How do I fix CVE-2021-41689?
To fix CVE-2021-41689, upgrade to DCMTK version 3.6.7 or later.
What software is affected by CVE-2021-41689?
CVE-2021-41689 affects DCMTK versions up to and including 3.6.6.
What type of vulnerability is CVE-2021-41689?
CVE-2021-41689 is a buffer overflow vulnerability caused by improper string copying.
Can CVE-2021-41689 be exploited remotely?
Yes, CVE-2021-41689 can be exploited remotely through crafted requests to the affected program.
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