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  5. CVE-2014-0099

CVE-2014-0099: Improper Neutralization of CRLF Sequences in HTTP Headers in Apache Tomcat

May 14, 2022 (updated April 14, 2025)

Integer overflow in java/org/apache/tomcat/util/buf/Ascii.java in Apache Tomcat before 6.0.40, 7.x before 7.0.53, and 8.x before 8.0.4, when operated behind a reverse proxy, allows remote attackers to conduct HTTP request smuggling attacks via a crafted Content-Length HTTP header.

References

  • github.com/advisories/GHSA-xh5x-j8jf-pcpx
  • github.com/apache/tomcat
  • github.com/apache/tomcat/commit/184cdc0d3f03f5737e12d21fff246d7285034597
  • github.com/apache/tomcat/commit/fffd63a3bd3a5475379b7c074820a5463b7663b3
  • github.com/apache/tomcat80/commit/990de53ab923c126f7402090a4ca53df4bb80cbd
  • h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04851013
  • lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113@%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b@%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95@%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb@%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c@%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
  • lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b@%3Cdev.tomcat.apache.org%3E
  • nvd.nist.gov/vuln/detail/CVE-2014-0099

Code Behaviors & Features

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Affected versions

All versions before 6.0.40, all versions starting from 7.0.0 before 7.0.54, all versions starting from 8.0.0 before 8.0.6

Fixed versions

  • 6.0.40
  • 7.0.54
  • 8.0.6

Solution

Upgrade to versions 6.0.40, 7.0.54, 8.0.6 or above.

Impact 4.3 MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Learn more about CVSS

Weakness

  • CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

Source file

maven/org.apache.tomcat/tomcat-util/CVE-2014-0099.yml

Spotted a mistake? Edit the file on GitLab.

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