CVE-2021-23017
Scores
EPSS
Percentile: 73.2%
CVSS
CVSS Score: 8.1/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
High (H)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Medium
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Partial
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
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.
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Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2021-23017
Source: github-poc
Vulnerable Software (44)
Type: Configuration
Product: automation-hub
Operating System: rhel
{ "fixed": "4.2.5-1.el7pc"}
Source: redhat
Type: Configuration
Product: automation-hub
Operating System: rhel
{ "fixed": "4.2.5-1.el8pc"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: rhel
{ "fixed": "1.18-8040020210526100943.522a0ee4"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: rhel
{ "fixed": "1.16-8040020210526102347.522a0ee4"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: rhel
{ "fixed": "1.20-8050020211221125012.c5368500"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: rhel
{ "fixed": "1.16-8010020210526102741.c27ad7f8"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: rhel
{ "fixed": "1.16-8020020210526102648.4cda2c84"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: altlinux
{ "fixed": "0:1.20.1-alt1"}
Source: redhat
Type: Configuration
Product: nginx
Operating System: debian
{ "fixed": "1.18.0-6.1"}
Source: debian
Type: Configuration
Product: nginx
Operating System: ubuntu bionic 18.04
{ "fixed": "1.14.0-0ubuntu1.9"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu focal 20.04
{ "fixed": "1.18.0-0ubuntu1.2"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu groovy 20.10
{ "fixed": "1.18.0-6ubuntu2.2"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu hirsute 21.04
{ "fixed": "1.18.0-6ubuntu8.2"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu impish 21.10
{ "fixed": "1.18.0-6ubuntu9"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu jammy 22.04
{ "fixed": "1.18.0-6ubuntu9"}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu trusty 14.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: nginx
Operating System: ubuntu xenial 16.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: nginx-geoip
Operating System: altlinux
{ "fixed": "0:1.20.1-alt1"}
Source: redhat
Type: Configuration
Product: nginx-image_filter
Operating System: altlinux
{ "fixed": "0:1.20.1-alt1"}
Source: redhat
Type: Configuration
Product: nginx-pam
Operating System: altlinux
{ "fixed": "0:1.20.1-alt1"}
Source: redhat