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Vulnerability record · CVE-2023-3341 · published 20 September 2023

CVE-2023-3341: Isc bind out-of-bounds write vulnerability

Isc · Bind

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.

7.5 CVSS 3.1 High EPSS 2.9% · top 13.8% CWE-787 · Out-of-bounds writeCWE-1325 · CWE-1325
7.5CVSS 3.1 base score
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/09/20/2 Mailing ListPatch
https://kb.isc.org/docs/cve-2023-3341 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00021.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNW Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6X Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20231013-0003/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5504 Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/20/2 Mailing ListPatch
https://kb.isc.org/docs/cve-2023-3341 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00021.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNW Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6X Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20231013-0003/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5504 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-3341), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.