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CVE-2023-42116 is a stack-based buffer overflow in Exim’s handling of NTLM challenge requests in the SPA/NTLM authentication subsystem. Insufficient validation of attacker-supplied data length before copying it into a fixed-length stack buffer permits memory corruption. An unauthenticated remote attacker may exploit the flaw to execute arbitrary code as the Exim service account when the SPA module for NTLM authentication is configured and available.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity Exim remote-code-execution vulnerability requiring the SPA/NTLM authentication module to be configured and available.
One of six reported Exim vulnerabilities affecting Exim versions before 4.96.1 and 4.97; fixes were released on 2023-09-02.
One of six reported Exim vulnerabilities affecting Exim versions before 4.96.1 and 4.97; fixes were released on 2023-09-02.
Vulnérabilité dans le sous-système SPA/NTLM d'Exim permettant une atteinte à la confidentialité des données et une exécution de code arbitraire via une mauvaise validation des entrées utilisateur.
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.