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CVE-2020-9488 is an improper certificate validation vulnerability in the Apache Log4j 2 SMTPAppender. When establishing an SMTPS connection, the appender does not properly reject a TLS certificate whose hostname does not match the configured SMTP server. A network adversary can therefore present a host-mismatched certificate and intercept the appender's SMTPS traffic.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Improper certificate validation vulnerability in the Log4j SMTP appender that permits a certificate hostname mismatch.
An improper certificate-validation vulnerability in the Apache Log4j SMTP appender that accepts a certificate with a host mismatch. The service pack removes affected classes as mitigation.
A Log4j vulnerability in which the SMTP appender improperly validates certificates when the certificate host does not match the target host.
A Log4j SMTP appender certificate-validation flaw involving hostname mismatches.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.