CVE-2023-3341: Debian Linux

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 37 only; version 38 only
• ISC BIND: from 9.2.0, before 9.16.44 (fixed in 9.16.44); from 9.18.0, before 9.18.19 (fixed in 9.18.19); from 9.19.0, before 9.19.17 (fixed in 9.19.17); version 9.9.3 only; version 9.9.12 only; version 9.9.13 only; …

Published 2023-09-20. Last modified 2026-06-17.