Описание
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid. This issue may lead to a remote denial of service via gopher URL requests.
Меры по смягчению последствий
To mitigate this issue, create an access list configuration to reject all gopher URL requests: Set ACL directives in your squid.conf file (or equivalent) as follows: acl gopher proto gopher http_access deny gopher Important: This sequence must be placed above any lines starting with "http_access allow" in your configuration. Observation: Some loss of performance may occur with this configuration.
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 | Fixed | RHSA-2024:1787 | 11.04.2024 |
| Red Hat Enterprise Linux 8 | squid | Fixed | RHSA-2024:0046 | 03.01.2024 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | squid | Fixed | RHSA-2024:0772 | 12.02.2024 |
| Red Hat Enterprise Linux 8.2 Telecommunications Update Service | squid | Fixed | RHSA-2024:0772 | 12.02.2024 |
| Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | squid | Fixed | RHSA-2024:0772 | 12.02.2024 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | squid | Fixed | RHSA-2024:0773 | 12.02.2024 |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | squid | Fixed | RHSA-2024:0773 | 12.02.2024 |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | squid | Fixed | RHSA-2024:0773 | 12.02.2024 |
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Дополнительная информация
Статус:
7.5 High
CVSS3
Связанные уязвимости
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and ...
7.5 High
CVSS3