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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
A denial of service vulnerability was identified that exists in Apache SpamAssassin before 3.4.2. 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.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
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OR
*cpe:2.3:a:apache:spamassassin:*:*:*:*:*:*:*:* versions up to (excluding) 3.4.2
Added
CPE Configuration
OR
*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
Changed
Reference Type
http://www.securityfocus.com/bid/105347 No Types Assigned
http://www.securityfocus.com/bid/105347 Third Party Advisory, VDB Entry
Changed
Reference Type
https://access.redhat.com/errata/RHSA-2018:2916 No Types Assigned
https://access.redhat.com/errata/RHSA-2018:2916 Third Party Advisory
Changed
Reference Type
https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E No Types Assigned
https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c@%3Cannounce.apache.org%3E Mailing List, Third Party Advisory
Changed
Reference Type
https://lists.debian.org/debian-lts-announce/2018/11/msg00016.html No Types Assigned
https://lists.debian.org/debian-lts-announce/2018/11/msg00016.html Third Party Advisory
Changed
Reference Type
https://usn.ubuntu.com/3811-1/ No Types Assigned
https://usn.ubuntu.com/3811-1/ Third Party Advisory
Changed
Reference Type
https://usn.ubuntu.com/3811-2/ No Types Assigned
https://usn.ubuntu.com/3811-2/ Third Party Advisory
CVE Modified by Apache Software Foundation11/14/2018 6:29:01 AM