CVE-2023-4236
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Isc Bind
PublishedSep 20, 2023
First seenSep 20, 2023
How to fix
Update
- isc bind9.18.18 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| isc bind | 9.18.0 ≤ v < 9.18.18, 9.18.11, 9.18.18 | 9.18.18 |
| fedoraproject fedora | 37, 38, 39 | — |
| debian debian_linux | 10.0, 11.0 | — |
| netapp h300s_firmware | No range specified | — |
| netapp h500s_firmware | No range specified | — |
| netapp h700s_firmware | No range specified | — |
| netapp h410s_firmware | No range specified | — |
| netapp h410c_firmware | No range specified | — |
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