BDU:2021-02749
Scores
EPSS
Percentile: 0.0%
CVSS
CVSS Score: 7.7/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
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
Low (L)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:H/Au:N/C:C/I:C/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
High (H)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Complete
Measures the impact to the confidentiality of information
Integrity Impact
Complete
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
Description
Уязвимость функции ngx_resolver_copy() сервера nginx связана с ошибкой единичного смещения в результате записи символа точки (‘.’, 0x2E) за пределы буфера кучи. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, выполнить произвольный код или вызвать отказ в обслуживании путем отправки специально созданных UDP-пакетов
Scaner-VS 7 — a modern vulnerability management solution
Sources
Related Vulnerabilities
Exploits
Exploit ID: CVE-2021-23017
Source: github-poc
Reference Links
Recommendations
Source: bdu
Использование рекомендаций:
Для nginx:
http://nginx.org/en/security_advisories.html
Для РЕД ОС:
http://repo.red-soft.ru/redos/7.2c/x86_64/updates/
Для программных продуктов Red Hat Inc.:
https://access.redhat.com/security/cve/cve-2021-23017
Для Ubuntu:
https://ubuntu.com/security/notices/USN-4967-1
https://ubuntu.com/security/notices/USN-4967-2
Для Debian GNU/Linux:
https://security-tracker.debian.org/tracker/CVE-2021-23017
Для ОСОН Основа:
Обновление программного обеспечения nginx до версии 1.14.2-2+deb10u4
Для ОС ОН «Стрелец»:
Обновление программного обеспечения nginx до версии 1.10.3-1+deb9u7
Для Fedora:
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/
Для продуктов Oracle:
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com/security-alerts/cpuapr2022.html
Для ОС Альт 8 СП: установка обновления из публичного репозитория программного средства
Vulnerable Software (345)
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 14.04 ESM
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: strelets *
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: осон основа оnyx *
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 20.04 LTS
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: fedora 33
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: red hat enterprise linux 8
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: debian gnu/linux 10
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 16.04 ESM
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: altlinux 8
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: debian gnu/linux 9
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 18.04 LTS
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: redos 7.2
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 20.10
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: ubuntu 21.04
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: nginx inc.
Product: nginx
Operating System: fedora 34
{ "version_end_excluding": "1.20.1", "version_start_including": "0.6.18"}
Source: bdu
Type: Configuration
Vendor: oracle corp.
Product: blockchain platform
Operating System: ubuntu 14.04 ESM
{ "version_end_excluding": "21.1.2"}
Source: bdu
Type: Configuration
Vendor: oracle corp.
Product: blockchain platform
Operating System: strelets *
{ "version_end_excluding": "21.1.2"}
Source: bdu
Type: Configuration
Vendor: oracle corp.
Product: blockchain platform
Operating System: осон основа оnyx *
{ "version_end_excluding": "21.1.2"}
Source: bdu
Type: Configuration
Vendor: oracle corp.
Product: blockchain platform
Operating System: ubuntu 20.04 LTS
{ "version_end_excluding": "21.1.2"}
Source: bdu
Type: Configuration
Vendor: oracle corp.
Product: blockchain platform
Operating System: fedora 33
{ "version_end_excluding": "21.1.2"}
Source: bdu