GLSA 200610-05: CAPI4Hylafax fax receiver: Execution of arbitrary code

http://security.gentoo.org/

Severity:	high
Title:	CAPI4Hylafax fax receiver: Execution of arbitrary code
Date:	10/17/2006
Bugs:	#145982
ID:	200610-05

Synopsis

CAPI4Hylafax allows remote attackers to execute arbitrary commands.

Background

CAPI4Hylafax makes it possible to send and receive faxes via CAPI and AVM Fritz!Cards.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/capi4hylafax	< 01.03.00.99.300.3-r1	>= 01.03.00.99.300.3-r1	All supported architectures

Description

Lionel Elie Mamane discovered an error in c2faxrecv, which doesn't properly sanitize TSI strings when handling incoming calls.

Impact

A remote attacker can send null (\0) and shell metacharacters in the TSI string from an anonymous fax number, leading to the execution of arbitrary code with the rights of the user running c2faxrecv.

Workaround

There is no known workaround at this time.

Resolution

All CAPI4Hylafax users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/capi4hylafax-01.03.00.99.300.3-r1"

References

CVE-2006-3126

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200610-05.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.