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CVE-2014-0099 is an integer-overflow flaw in Apache Tomcat and JBoss Web request Content-Length parsing. The affected parser did not validate that the numeric Content-Length value could be represented without overflow. A crafted Content-Length header can therefore cause the reverse proxy and the backend Tomcat or JBoss Web server to interpret HTTP request boundaries differently, enabling HTTP request smuggling. Affected upstream Tomcat versions include 6.0.0 through 6.0.39, 7.0.0 through 7.0.52, and 8.0.0-RC1 through 8.0.3.
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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.
42 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Apache Tomcat information-disclosure vulnerability caused by failure to check for integer overflows while parsing Content-Length headers. A remote unauthenticated attacker can send a specially crafted request to obtain sensitive information.
HTTP request-smuggling vulnerability in Tomcat/JBossWeb involving malicious Content-Length headers.
An integer-overflow vulnerability in Apache Tomcat's Ascii.java handling which can permit remote HTTP request smuggling through a crafted Content-Length header when Tomcat operates behind a reverse proxy.
A request-smuggling vulnerability in Tomcat/JBossWeb triggered through a malicious Content-Length header.
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.