[SECURITY] [ GLSA 200709-14 ] ClamAV: Multiple vulnerabilities

[Reini Urban]

Yaakov (Cygwin Ports) schrieb:
> clamav maintainer,
> It's time to upgrade clamav again; see attached.

Thanks, I missed that.

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> Gentoo Linux Security Advisory                           GLSA 200709-14
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>                                             http://security.gentoo.org/
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>   Severity: High
>      Title: ClamAV: Multiple vulnerabilities
>       Date: September 20, 2007
>       Bugs: #189912
>         ID: 200709-14
> 
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> Synopsis
> ========
> 
> Vulnerabilities have been discovered in ClamAV allowing remote
> execution of arbitrary code and Denial of Service attacks.
> 
> Background
> ==========
> 
> Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX,
> designed especially for e-mail scanning on mail gateways.
> 
> Affected packages
> =================
> 
>     -------------------------------------------------------------------
>      Package               /  Vulnerable  /                 Unaffected
>     -------------------------------------------------------------------
>   1  app-antivirus/clamav      < 0.91.2                      >= 0.91.2
> 
> Description
> ===========
> 
> 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).
> 
> Impact
> ======
> 
> 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.
> 
> Workaround
> ==========
> 
> There is no known workaround at this time.
> 
> Resolution
> ==========
> 
> All ClamAV users should upgrade to the latest version:
> 
>     # emerge --sync
>     # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.91.2"
> 
> References
> ==========
> 
>   [ 1 ] CVE-2007-4510
>         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4510
>   [ 2 ] CVE-2007-4560
>         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4560
> 
> Availability
> ============
> 
> This GLSA and any updates to it are available for viewing at
> the Gentoo Security Website:
> 
>   http://security.gentoo.org/glsa/glsa-200709-14.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
> http://bugs.gentoo.org.
> 
> License
> =======
> 
> Copyright 2007 Gentoo Foundation, Inc; referenced text
> belongs to its owner(s).
> 
> The contents of this document are licensed under the
> Creative Commons - Attribution / Share Alike license.
> 
> http://creativecommons.org/licenses/by-sa/2.5

-- 
Reini Urban
http://phpwiki.org/  http://murbreak.at/
http://helsinki.at/  http://spacemovie.mur.at/