GLSA 200709-14: ClamAV: Multiple vulnerabilities

http://security.gentoo.org/

Опасность:	высокая
Заголовок:	ClamAV: Multiple vulnerabilities
Дата:	20.09.2007
Ошибки:	#189912
ID:	200709-14

Сводка

Vulnerabilities have been discovered in ClamAV allowing remote execution of arbitrary code and Denial of Service attacks.

Назначение

Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways.

Уязвимые пакеты

Пакет	Уязвимый	Нетронутый	Архитектура(ы)
app-antivirus/clamav	< 0.91.2	>= 0.91.2	All supported architectures

Описание

Nikolaos Rangos discovered a vulnerability in ClamAV which exists because the recipient address extracted from email messages is not properly sanitized before being used in a call to "popen()" when executing sendmail (CVE-2007-4560). Also, NULL-pointer dereference errors exist within the "cli_scanrtf()" function in libclamav/rtf.c and Stefanos Stamatis discovered a NULL-pointer dereference vulnerability within the "cli_html_normalise()" function in libclamav/htmlnorm.c (CVE-2007-4510).

Воздействие

The unsanitized recipient address can be exploited to execute arbitrary code with the privileges of the clamav-milter process by sending an email with a specially crafted recipient address to the affected system. Also, the NULL-pointer dereference errors can be exploited to crash ClamAV. Successful exploitation of the latter vulnerability requires that clamav-milter is started with the "black hole" mode activated, which is not enabled by default.

Обход

There is no known workaround at this time.

Решение

All ClamAV users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.91.2"

Ссылки

Наличие

Этот GLSA и любые обновления для нее доступны для просмотра на сайте Gentoo Security: http://security.gentoo.org/glsa/glsa-200709-14.xml

Опасения?

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