Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-23017

Off-by-one Error

Published: Jun 01, 2021 | Modified: Nov 21, 2024
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
8.1 IMPORTANT
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-23017
CWEhttps://cwe.mitre.org/data/definitions/193.html

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

NameVendorStart VersionEnd Version
NginxF50.6.18 (including)1.20.1 (excluding)
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/3scale-rhel7-operator:1.14.0-4*
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/3scale-rhel7-operator-metadata:2.11.0-16*
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/apicast-rhel7-operator:1.14.0-3*
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/apicast-rhel7-operator-metadata:2.11.0-9*
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/memcached-rhel7:1.4.16-38*
3scale API Management 2.11 on RHEL 7RedHat3scale-amp2/system-rhel7:1.15.0-8*
3scale API Management 2.11 on RHEL 8RedHat3scale-amp2/apicast-gateway-rhel8:1.20.0-6*
3scale API Management 2.11 on RHEL 8RedHat3scale-amp2/backend-rhel8:1.14.0-3*
3scale API Management 2.11 on RHEL 8RedHat3scale-amp2/toolbox-rhel8:1.6.0-7*
3scale API Management 2.11 on RHEL 8RedHat3scale-amp2/zync-rhel8:1.14.0-3*
Red Hat Advanced Cluster Management for Kubernetes 2.1 for RHEL 8RedHatrhacm2/acm-must-gather-rhel8:v2.1.11-2*
Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 7RedHatrhacm2/management-ingress-rhel7:v2.3.3-3*
Red Hat Ansible Tower 3.8 for RHEL 7RedHatansible-tower-38/ansible-tower-rhel7:3.8.4-1*
Red Hat Automation Hub 4.2 for RHEL 7RedHatautomation-hub-0:4.2.5-1.el7pc*
Red Hat Automation Hub 4.2 for RHEL 7RedHatpython-galaxy-ng-0:4.2.5-2.el7pc*
Red Hat Automation Hub 4.2 for RHEL 7RedHatpython-pulpcore-0:3.7.6-1.el7pc*
Red Hat Automation Hub 4.2 for RHEL 8RedHatautomation-hub-0:4.2.5-1.el8pc*
Red Hat Automation Hub 4.2 for RHEL 8RedHatpython-galaxy-ng-0:4.2.5-2.el8pc*
Red Hat Automation Hub 4.2 for RHEL 8RedHatpython-pulpcore-0:3.7.6-1.el8pc*
Red Hat Enterprise Linux 8RedHatnginx:1.18-8040020210526100943.522a0ee4*
Red Hat Enterprise Linux 8RedHatnginx:1.16-8040020210526102347.522a0ee4*
Red Hat Enterprise Linux 8RedHatnginx:1.20-8050020211221125012.c5368500*
Red Hat Enterprise Linux 8.1 Extended Update SupportRedHatnginx:1.16-8010020210526102741.c27ad7f8*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatnginx:1.16-8020020210526102648.4cda2c84*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-nginx118-nginx-1:1.18.0-3.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-nginx116-nginx-1:1.16.1-6.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSRedHatrh-nginx118-nginx-1:1.18.0-3.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSRedHatrh-nginx116-nginx-1:1.16.1-6.el7*
NginxUbuntubionic*
NginxUbuntudevel*
NginxUbuntuesm-infra-legacy/trusty*
NginxUbuntuesm-infra/bionic*
NginxUbuntuesm-infra/focal*
NginxUbuntuesm-infra/xenial*
NginxUbuntufocal*
NginxUbuntugroovy*
NginxUbuntuhirsute*
NginxUbuntuimpish*
NginxUbuntujammy*
NginxUbuntutrusty*
NginxUbuntutrusty/esm*
NginxUbuntuxenial*

Potential Mitigations

References

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