Published: 31/05/2014 Updated: 15/04/2019
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

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

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Vendor Advisories

Several security issues were fixed in Tomcat ...
It was found that JBoss Web / Apache Tomcat did not check for overflowing values when parsing request content length headers A remote attacker could use this flaw to perform an HTTP request smuggling attack on a JBoss Web / Apache Tomcat server located behind a reverse proxy that processed the content length header correctly ...
It was discovered that JBoss Web / Apache Tomcat did not limit the length of chunk sizes when using chunked transfer encoding A remote attacker could use this flaw to perform a denial of service attack against JBoss Web / Apache Tomcat by streaming an unlimited quantity of data, leading to excessive consumption of server resources (CVE-2014-0075) ...
It was discovered that JBoss Web / Apache Tomcat did not limit the length of chunk sizes when using chunked transfer encoding A remote attacker could use this flaw to perform a denial of service attack against JBoss Web / Apache Tomcat by streaming an unlimited quantity of data, leading to excessive consumption of server resources (CVE-2014-0075) ...
It was discovered that malicious web applications could use the Expression Language to bypass protections of a Security Manager as expressions were evaluated within a privileged code section For the oldstable distribution (wheezy), this problem has been fixed in version 7028-4+deb7u3 This update also provides fixes for CVE-2013-4444, CVE-2014-0 ...
<!-- Start - Changes for Security Advisory Channel --> Security Advisory ID SYMSA1329 Initial Publication Date: Advisory Status: Advisory Severity: CVSS Base Score: Legacy ID 23 Jul 2015 Open High CVSS v2: 78 SA100 ...
Oracle Critical Patch Update Advisory - October 2016 Description A Critical Patch Update (CPU) is a collection of patches for multiple security vulnerabilities Critical Patch Update patches are usually cumulative, but each advisory describes only the security fixes added since the previou ...

Recent Articles

Apache Patches DoS, Information Disclosure Bugs in Tomcat
Threatpost • Chris Brook • 30 May 2014

Apache recently patched Tomcat, fixing a trio of information disclosure bugs and a denial of service bug in the open source web server and servlet container.
The denial of service bug, discovered in February by David Jorm of the Red Hat Security Response Team, could have allowed an attacker to create a malformed chunk size as part of a chunked request that would’ve allowed an unlimited amount of data to be streamed to the server. This would have bypassed the size limits enforced on a req...