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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 |
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Title: ClamAV: Multiple vulnerabilities |
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Date: September 20, 2007 |
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Bugs: #189912 |
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ID: 200709-14 |
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Synopsis |
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======== |
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|
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Vulnerabilities have been discovered in ClamAV allowing remote |
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execution of arbitrary code and Denial of Service attacks. |
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|
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Background |
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========== |
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|
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Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, |
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designed especially for e-mail scanning on mail gateways. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 app-antivirus/clamav < 0.91.2 >= 0.91.2 |
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|
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Description |
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=========== |
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|
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Nikolaos Rangos discovered a vulnerability in ClamAV which exists |
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because the recipient address extracted from email messages is not |
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properly sanitized before being used in a call to "popen()" when |
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executing sendmail (CVE-2007-4560). Also, NULL-pointer dereference |
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errors exist within the "cli_scanrtf()" function in libclamav/rtf.c and |
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Stefanos Stamatis discovered a NULL-pointer dereference vulnerability |
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within the "cli_html_normalise()" function in libclamav/htmlnorm.c |
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(CVE-2007-4510). |
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|
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Impact |
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====== |
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|
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The unsanitized recipient address can be exploited to execute arbitrary |
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code with the privileges of the clamav-milter process by sending an |
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email with a specially crafted recipient address to the affected |
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system. Also, the NULL-pointer dereference errors can be exploited to |
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crash ClamAV. Successful exploitation of the latter vulnerability |
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requires that clamav-milter is started with the "black hole" mode |
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activated, which is not enabled by default. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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All ClamAV users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.91.2" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-4510 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4510 |
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[ 2 ] CVE-2007-4560 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4560 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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|
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http://security.gentoo.org/glsa/glsa-200709-14.xml |
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|
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Concerns? |
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========= |
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|
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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|
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Copyright 2007 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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-- |
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