CVE-2021-23017
nginx - security update
7.7
HIGH
CVSS 3.1
EPSS 53.5%
Description
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.
How to fix CVE-2021-23017
To remediate CVE-2021-23017, upgrade the affected package to a fixed version below.
- Alpine/nginx—upgrade to 1.16.1-r3 or later
Is CVE-2021-23017 being exploited?
Likely — EPSS is 53.5%, placing CVE-2021-23017 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- >= 0.6.18, < 1.16.1-r3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L |