CVE Vulnerabilities

CVE-2021-23017

Off-by-one Error

Published: Jun 01, 2021 | Modified: Nov 07, 2023
CVSS 3.x
7.7
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

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.

Weakness

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

Affected Software

Name Vendor Start Version End Version
Nginx F5 0.6.18 *

Potential Mitigations

References