CVE-2023-3341

Publication date 20 September 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
bind9	25.04 plucky	Fixed 1:9.18.18-0ubuntu2
	24.10 oracular	Fixed 1:9.18.18-0ubuntu2
	24.04 LTS noble	Fixed 1:9.18.18-0ubuntu2
	23.10 mantic	Fixed 1:9.18.18-0ubuntu2
	23.04 lunar	Fixed 1:9.18.12-1ubuntu1.2
	22.04 LTS jammy	Fixed 1:9.18.12-0ubuntu0.22.04.3
	20.04 LTS focal	Fixed 1:9.16.1-0ubuntu2.16
	18.04 LTS bionic	Fixed 1:9.11.3+dfsg-1ubuntu1.19+esm2 Ubuntu Pro
	16.04 LTS xenial	Fixed 1:9.10.3.dfsg.P4-8ubuntu1.19+esm7 Ubuntu Pro
	14.04 LTS trusty	Fixed 1:9.9.5.dfsg-3ubuntu0.19+esm11 Ubuntu Pro
isc-dhcp	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

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Notes

alexmurray

As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs

mdeslaur

I don’t believe this issue applies to the bind9 libs in isc-dhcp, marking as not-affected

Severity score breakdown

Parameter	Value
Base score	7.5 · High
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