GLSA 200501-25: Squid: Multiple vulnerabilities

http://security.gentoo.org/

Опасность:	средняя
Заголовок:	Squid: Multiple vulnerabilities
Дата:	16.01.2005
Ошибки:	#77934, #77521
ID:	200501-25

Сводка

Squid contains vulnerabilities in the the code handling NTLM (NT Lan Manager), Gopher to HTML, ACLs and WCCP (Web Cache Communication Protocol) which could lead to ACL bypass, denial of service and arbitrary code execution.

Назначение

Squid is a full-featured Web proxy cache designed to run on Unix systems. It supports proxying and caching of HTTP, FTP, and other URLs, as well as SSL support, cache hierarchies, transparent caching, access control lists and many other features.

Уязвимые пакеты

Пакет	Уязвимый	Нетронутый	Архитектура(ы)
net-proxy/squid	< 2.5.7-r2	>= 2.5.7-r2	All supported architectures

Описание

Squid contains a vulnerability in the gopherToHTML function (CAN-2005-0094) and incorrectly checks the 'number of caches' field when parsing WCCP_I_SEE_YOU messages (CAN-2005-0095). Furthermore the NTLM code contains two errors. One is a memory leak in the fakeauth_auth helper (CAN-2005-0096) and the other is a NULL pointer dereferencing error (CAN-2005-0097). Finally Squid also contains an error in the ACL parsing code (CAN-2005-0194).

Воздействие

With the WCCP issue an attacker could cause denial of service by sending a specially crafted UDP packet. With the Gopher issue an attacker might be able to execute arbitrary code by enticing a user to connect to a malicious Gopher server. The NTLM issues could lead to denial of service by memory consumption or by crashing Squid. The ACL issue could lead to ACL bypass.

Обход

There is no known workaround at this time.

Решение

All Squid users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-proxy/squid-2.5.7-r2"

Ссылки

Наличие

Этот GLSA и любые обновления для нее доступны для просмотра на сайте Gentoo Security: http://security.gentoo.org/glsa/glsa-200501-25.xml

Опасения?

Безопасность является одной из главных задач Gentoo Linux и первостепенное значение обеспечить конфиденциальность и безопасность машин наших пользователей. Любые соображения безопасности должны быть адресованы security@gentoo.org или в качестве альтернативы, вы можете сообщить об ошибке на https://bugs.gentoo.org.