CVE-2017-15705Not scoredCWE-20

CVE-2017-15705: Apache Software Foundation Apache SpamAssassin vulnerability

Apache Software Foundation · Apache SpamAssassin

Fixed in 3.4.2 · Affected: Apache Software Foundation Apache SpamAssassin before 3.4.2 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

7.9%probability of exploitation in the next 30 days

94th percentile

050100

Higher than 94% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Apache Software Foundation · Apache SpamAssassinall modern versions before 3.4.2

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Input Validation · Input Validation and Logic
Vendor: Apache Software Foundation
Published: September 2018
Band: Possible (1 to 10%), September 2018

CoverageNo articles yet

No CyberSIXT article names CVE-2017-15705 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.