Date: Sun, 16 Sep 2018 12:59:12 -0400 From: "Kevin A. McGrail" <kmcgrail@...che.org> To: Spamassassin <users@...mAssassin.apache.org>, SpamAssassin Devel List <dev@...massassin.apache.org>, announce@...massassin.apache.org, announce@...che.org Cc: security@...massassin.apache.org, oss-security@...ts.openwall.com Subject: [SECURITY] Apache SpamAssassin 3.4.2 resolves CVE-2017-15705, CVE-2016-1238, CVE-2018-11780 & CVE-2018-11781 Apache SpamAssassin 3.4.2 was recently released , and fixes several issues of security note. First, a denial of service vulnerability that exists in all modern versions. The vulnerability arises with certain unclosed tags in emails that cause markup to be handled incorrectly leading to scan timeouts. In Apache SpamAssassin, using HTML::Parser, we setup an object and hook into the begin and end tag event handlers In both cases, the "open" event is immediately followed by a "close" event - even if the tag *does not* close in the HTML being parsed. Because of this, we are missing the "text" event to deal with the object normally. This can cause carefully crafted emails that might take more scan time than expected leading to a Denial of Service. The issue is possibly a bug or design decision in HTML::Parser that specifically impacts the way Apache SpamAssassin uses the module with poorly formed html. The exploit has been seen in the wild but not believe to have been purposefully part of a Denial of Service attempt. We are concerned that there may be attempts to abuse the vulnerability in the future. Therefore, we strongly recommend all users of these versions upgrade to Apache SpamAssassin 3.4.2 as soon as possible. This issue has been assigned CVE id CVE-2017-15705 . Second, this release also fixes a reliance on "." in @INC in one configuration script. Whether this can be exploited in any way is uncertain. This issue has been assigned CVE id CVE-2016-1238 . Third, this release fixes a potential Remote Code Execution bug with the PDFInfo plugin. Thanks to cPanel Security Team for their report of this issue. This issue has been assigned CVE id CVE-2018-11780 . Fourth, this release fixes a local user code injection in the meta rule syntax. Thanks again to cPanel Security Team for their report of this issue. This issue has been assigned CVE id CVE-2018-11781 . To contact the Apache SpamAssassin security team, please e-mail security at spamassassin.apache.org. For more information about Apache SpamAssassin, visit the http://spamassassin.apache.org/ web site. Apache SpamAssassin Security Team : https://lists.apache.org/thread.html/1ac11532235b5459aa16c4e9d636bf4aa0b141d347d1361e40cc1b78@%3Cannounce.apache.org%3E : https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-15705 : https://cve.mitre.org/cgi-bin/cvename.cgi?name=2016-1238 : https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-11780 : https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-11781 -- Kevin A. McGrail VP Fundraising, Apache Software Foundation Chair Emeritus Apache SpamAssassin Project https://www.linkedin.com/in/kmcgrail - 703.798.0171
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