CVE-2023-3341
bind9 - security update
Description
The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary. This issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1.
How to fix CVE-2023-3341
To remediate CVE-2023-3341, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.44-r0 or later
- —upgrade to 1:9.16.44-1~deb11u1 or later
- —upgrade to 1:9.11.5.P4+dfsg-5.1+deb10u10 or later
- —upgrade to 1:9.16.44-1~deb11u1 or later
Is CVE-2023-3341 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 9.16.44-r0
- from 0, < 1:9.16.44-1~deb11u1
- from 0, < 1:9.11.5.P4+dfsg-5.1+deb10u10
- from 0, < 1:9.16.44-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |