GLSA 200405-03: ClamAV VirusEvent parameter vulnerability

http://security.gentoo.org/

Опасность:	высокая
Заголовок:	ClamAV VirusEvent parameter vulnerability
Дата:	11.05.2004
Ошибки:	#46264
ID:	200405-03

Сводка

With a specific configuration (using %f in the VirusEvent parameter), Clam AntiVirus is vulnerable to an attack allowing execution of arbitrary commands.

Назначение

From http://www.clamav.net/ :

"Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-threaded daemon, a command line scanner, and a tool for automatic updating via Internet. The programs are based on a shared library distributed with the Clam AntiVirus package, which you can use with your own software. Most importantly, the virus database is kept up to date."

Уязвимые пакеты

Пакет	Уязвимый	Нетронутый	Архитектура(ы)
app-antivirus/clamav	< 0.70	>= 0.70	All supported architectures

Описание

The VirusEvent parameter in the clamav.conf configuration file allows to specify a system command to run whenever a virus is found. This system command can make use of the "%f" parameter which is replaced by the name of the file infected. The name of the file scanned is under control of the attacker and is not sufficiently checked. Version 0.70 of clamav disables the use of the "%f" parameter.

Воздействие

Sending a virus with a malicious file name can result in execution of arbirary system commands with the rights of the antivirus process. Since clamav is often associated to mail servers for email scanning, this attack can be used remotely.

Обход

You should not use the "%f" parameter in your VirusEvent configuration.

Решение

All users of Clam AntiVirus should upgrade to the latest stable version:

    # emerge sync
    
    # emerge -pv ">=app-antivirus/clamav-0.70"
    # emerge ">=app-antivirus/clamav-0.70"

Ссылки

CVE-2004-1876

Наличие

Этот GLSA и любые обновления для нее доступны для просмотра на сайте Gentoo Security: http://security.gentoo.org/glsa/glsa-200405-03.xml

Опасения?

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