# CVE-2020-8618: bind9: An attacker who is permitted to send zone data to a server via zone transfer can exploit this to intentionally trigge...

CVE-2020-8618 is fixed in 7 products on 1 platform, first by bind9 1:9.16.1-0ubuntu2.2, released June 16, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-8618
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0188
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 16, 2020

## Description

An attacker who is permitted to send zone data to a server via zone transfer can exploit this to intentionally trigger the assertion failure with a specially constructed zone, denying service to clients.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bind9 Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | bind9-dnsutils Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9-dnsutils 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9-dnsutils-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | bind9-host Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9-host 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9-host-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | bind9-libs Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9-libs 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9-libs-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | bind9-utils Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9-utils 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9-utils-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | bind9utils Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [bind9utils 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bind9utils-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |
| Linux | dnsutils Ubuntu 20.04 LTS (focal) | 1:9.16.1-0ubuntu2.2 | [dnsutils 1:9.16.1-0ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dnsutils-1-9.16.1-0ubuntu2.2.md) | Jun 16, 2020 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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