Описание
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.
An input validation flaw was found in Squid. This issue could allow a malicious server in collaboration with a trusted client to consume arbitrarily large amounts of memory on the server running Squid. The highest threat from this vulnerability is to system availability.
Отчет
This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata. Red Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.
Меры по смягчению последствий
If possible, disable URN processing by adding the following lines in squid.conf:
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | squid | Out of support scope | ||
| Red Hat Enterprise Linux 6 | squid34 | Out of support scope | ||
| Red Hat Enterprise Linux 7 | squid | Out of support scope | ||
| Red Hat Enterprise Linux 9 | squid | Not affected | ||
| Red Hat Enterprise Linux 8 | squid | Fixed | RHSA-2021:4292 | 09.11.2021 |
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Дополнительная информация
Статус:
EPSS
7.4 High
CVSS3
Связанные уязвимости
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due ...
Уязвимость прокси-сервера Squid, существующая из-за недостаточной проверки ввода при разрешении идентификаторов ресурсов «urn:», позволяющая нарушителю вызвать отказ в обслуживании
EPSS
7.4 High
CVSS3