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CVE-2011-3368 is an improper input-validation flaw in Apache HTTP Server mod_proxy affecting Apache HTTP Server 1.3 through 1.3.42, 2.0 through 2.0.64, and 2.2 through 2.2.21. In reverse-proxy configurations using RewriteRule or ProxyPassMatch pattern matching, a malformed request URI beginning with an at-sign can be interpreted unexpectedly during target URL expansion. This can cause the proxy to route an attacker-controlled request to an intranet server rather than the intended reverse-proxy target.
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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 valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Apache HTTP Server mod_rewrite security issue involving potentially surprising rewrite-rule pattern expansions when request URIs were not constrained to URL-path grammar.
A reverse proxy vulnerability in Apache HTTP Server where malformed request URIs could cause unexpected expansion of target URLs.
An Apache HTTP Server mod_proxy reverse-proxy configuration flaw that can permit remote attackers to relay requests to intranet servers using a malformed URI with an initial at-sign (@).
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.