Vulnerability Description
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Bind | >= 9.18.0, < 9.18.18 |
| Fedoraproject | Fedora | 37 |
| Debian | Debian Linux | 10.0 |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2023/09/20/2Mailing ListThird Party Advisory
- https://kb.isc.org/docs/cve-2023-4236Vendor Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20231013-0004/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5504Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/09/20/2Mailing ListThird Party Advisory
- https://kb.isc.org/docs/cve-2023-4236Vendor Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20231013-0004/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5504Third Party Advisory
FAQ
What is CVE-2023-4236?
CVE-2023-4236 is a vulnerability with a CVSS score of 7.5 (HIGH). A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused u...
How severe is CVE-2023-4236?
CVE-2023-4236 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-4236?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Bind, Fedoraproject Fedora, Debian Debian Linux, Netapp H300S Firmware, Netapp H300S.