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Please also note that these notices apply to the official releases of SpamAssassin. Some third party distribution packages, such as Debian, choose to backport fixes. If you are using a distribution package with a version that appears vulnerable, check with the security advisories for that distribution to see if the fix has been backported.

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_Security Items Fixed with [SpamAssassin] 3.4.2_
\[CVEID\]:CVE-2017-15705
\[PRODUCT\]:Apache [SpamAssassin]
\[VERSION\]:Apache [SpamAssassin] 1.5 to 3.4.1
\[PROBLEMTYPE\]:Denial of Service
\[REFERENCES\]:https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E
\[DESCRIPTION\]:While working on bug 7437, a denial of service vulnerability was identified that exists in all modern versions of Apache [SpamAssassin].

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 believed 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.

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\[CVEID\]:CVE-2016-1238
\[PRODUCT\]:Apache [SpamAssassin]
\[VERSION\]:Apache [SpamAssassin] 1.5 to 3.4.1
\[PROBLEMTYPE\]:Unsafe Include Path
\[REFERENCES\]:https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E
\[DESCRIPTION\]:While working on bug 7378, an issue that might allow improper code to be purposefully or accidentally included was identiied.  This release also fixes a reliance on "." in @INC in one configuration script.  Whether this can be exploited in any way is uncertain.

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\[CVEID\]:CVE-2018-11780
\[PRODUCT\]:Apache [SpamAssassin]
\[VERSION\]:Apache [SpamAssassin] 3.4.1
\[PROBLEMTYPE\]:Remote Code Execution
\[REFERENCES\]:https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E
\[DESCRIPTION\]:While working on bug 7556, we identified a potential Remote Code Execution bug with the PDFInfo plugin.  Thanks to cPanel Security Team for their report of this issue.  This issue only exists in Apache [SpamAssassin] 3.4.1 and newer and the plugin is not enabled by default.

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\[CVEID\]:CVE-2018-11781
\[PRODUCT\]:Apache [SpamAssassin]
\[VERSION\]:Apache [SpamAssassin] 3.1.0 to 3.4.1
\[PROBLEMTYPE\]:Local Code Execution
\[REFERENCES\]:https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E
\[DESCRIPTION\]:While working on bug 7557, 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 affects [SpamAssassin] 3.1.0 to 3.4.1.  Upgrading to 3.4.2 is highly recommended though it is believed this is only exploitable with unsafe external rules loaded by an admin or with local users and allow_user_rules enabled.