CVE-2021-23017
Publication date 25 May 2021
Last updated 24 July 2024
Ubuntu priority
A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| nginx | 22.04 LTS jammy |
Fixed 1.18.0-6ubuntu9
|
| 20.04 LTS focal |
Fixed 1.18.0-0ubuntu1.2
|
|
| 18.04 LTS bionic |
Fixed 1.14.0-0ubuntu1.9
|
|
| 16.04 LTS xenial |
Fixed 1.10.3-0ubuntu0.16.04.5+esm1
|
|
| 14.04 LTS trusty |
Fixed 1.4.6-1ubuntu3.9+esm2
|
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| Package | Patch details |
|---|---|
| nginx |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.7 · High
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-4967-1
- nginx vulnerability
- 26 May 2021
- USN-4967-2
- nginx vulnerability
- 27 May 2021