Описание
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
A flaw was found in squid. Due to incorrect data validation, a HTTP Request Smuggling attack against HTTP and HTTPS traffic is possible leading to cache poisoning. The highest threat from this vulnerability is to data confidentiality and integrity.
Меры по смягчению последствий
Disable the relaxed HTTP parser in squid.conf:
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | squid | Out of support scope | ||
| 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 | Fixed | RHSA-2020:4082 | 30.09.2020 |
| Red Hat Enterprise Linux 8 | squid | Fixed | RHSA-2020:3623 | 03.09.2020 |
| Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions | squid | Fixed | RHSA-2020:3623 | 03.09.2020 |
| Red Hat Enterprise Linux 8.1 Extended Update Support | squid | Fixed | RHSA-2020:3623 | 03.09.2020 |
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Дополнительная информация
Статус:
EPSS
9.6 Critical
CVSS3
Связанные уязвимости
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due ...
Уязвимость прокси-сервера Squid, связанная с непоследовательной интерпретацией http-запросов, позволяющая нарушителю осуществлять межсайтовые сценарные атаки (XSS)
EPSS
9.6 Critical
CVSS3