---
title: "CVE-2002-1220:  Assertion failure with large UDP size for nonexistent subdomain"
slug: "aa-00953"
description: "Remote attackers can cause a denial of service (termination due to assertion failure) via a request for a subdomain that does not exist, with an OPT resource record with a large UDP payload size."
updated: 2021-08-05T13:48:47Z
published: 2021-08-05T13:48:47Z
canonical: "kb.isc.org/aa-00953"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.isc.org/llms.txt
> Use this file to discover all available pages before exploring further.

# CVE-2002-1220:  Assertion failure with large UDP size for nonexistent subdomain

Possibility to execute arbitrary code

CVE: [CVE-2002-1220](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1220)

CERT: [VU#229595](http://www.kb.cert.org/vuls/id/229595)

Posting date: 12 Nov 2002

Program Impacted: [BIND](https://www.isc.org/software/bind)

Versions affected: 8.3.0 - 8.3.3

Severity: Serious

Exploitable: Remotely

Description: Remote attackers can cause a denial of service (termination due to assertion failure) via a request for a subdomain that does not exist, with an OPT resource record with a large UDP payload size.

Workarounds: None.

Active exploits: None known at this time.

Solution: Upgrade to BIND 8.3.4 or later

ISC would like to thank Internet Security Systems for bringing this to our attention.

**© 2001-2018 Internet Systems Consortium** For assistance with problems and questions for which you have not been able to find an answer in our Knowledge Base, we recommend searching our [community mailing list archives](https://lists.isc.org/mailman/listinfo) and/or posting your question there (you will need to register there first for your posts to be accepted). The [bind-users](https://lists.isc.org/mailman/listinfo/bind-users) and the [dhcp-users](https://lists.isc.org/mailman/listinfo/dhcp-users) lists particularly have a long-standing and active membership. ISC relies on the financial support of the community to fund the development of its open source software products. If you would like to support future product evolution and maintenance as well having peace of mind knowing that our team of experts are poised to provide you with individual technical assistance whenever you call upon them, then please consider our Professional Subscription Support services - details can be found on our [main website](https://www.isc.org/support).