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CVE-2024-32475 is an abnormal-termination vulnerability in Envoy's outbound TLS SNI handling. When an upstream TLS cluster has auto_sni enabled, Envoy uses the incoming Host or :authority header as the SNI value for the upstream connection. An authority value exceeding the SNI standard's 255-character limit causes SNI configuration to fail. Envoy incorrectly assumes this operation succeeds and aborts rather than handling the error gracefully.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Envoy denial-of-service flaw that can cause abnormal termination when auto_sni is used with an authority header exceeding 255 characters.
An Envoy abnormal-termination vulnerability triggered when auto_sni is used with an authority header exceeding 255 characters.
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.