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CVE-2017-16944 is a denial-of-service vulnerability in the Exim SMTP daemon affecting Exim 4.88 and 4.89 when the SMTP chunking feature is enabled. The flaw is in BDAT message handling in the receive_msg logic, specifically involving bdat_getc and improper handling of a '.' character as if it were the end-of-message marker during BDAT content processing. Because BDAT data is not supposed to use the traditional SMTP dot-termination semantics, this incorrect check can leave Exim in an inconsistent internal state in which the receive_getc function pointer is not reset correctly. Subsequent BDAT command sequences can then drive the daemon into an infinite loop and eventually stack exhaustion.
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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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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Cross-references every affected SKU, including bundled OEM variants.
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