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CVE-2024-38474 is an improper substitution-encoding flaw in Apache HTTP Server mod_rewrite affecting versions 2.4.59 and earlier. Unsafe RewriteRule configurations can process an attacker-supplied encoded question mark in a backreference inconsistently with a literal question mark in the rule substitution. This can cause the effective rewritten path to be truncated or otherwise interpreted differently by Apache request-processing components, defeating assumptions about the final filesystem path or query string.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Apache mod_rewrite encoding issue identified in the report as one of several possible initial access vectors.
An Apache HTTP Server mod_rewrite security issue involving capture and re-substitution of encoded question marks, which could permit manipulation of a substitution target's query string. The UnsafeAllow3F flag restores the otherwise blocked behavior and should only be used where user-supplied %3F cannot be exploited.
One of a set of high-severity Apache HTTP Server vulnerabilities described collectively as SSRF, bypass, and redirect issues on the C2 server.
Unknown
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.