CVE-2023-4236
Published: 20 September 2023
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.
Notes
| Author | Note |
|---|---|
| alexmurray | As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs |
| mdeslaur | 9.18.x only |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
bind9 Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
(code not present)
|
| xenial |
Not vulnerable
(code not present)
|
|
| bionic |
Not vulnerable
(code not present)
|
|
| focal |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(9.18.19)
|
|
| jammy |
Released
(1:9.18.12-0ubuntu0.22.04.3)
|
|
| lunar |
Released
(1:9.18.12-1ubuntu1.2)
|
|
| mantic |
Released
(1:9.18.18-0ubuntu2)
|
|
|
isc-dhcp Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
(code not present)
|
| xenial |
Not vulnerable
(code not present)
|
|
| bionic |
Needs triage
|
|
| focal |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| lunar |
Not vulnerable
(code not present)
|
|
| mantic |
Not vulnerable
(code not present)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |