vulnerability announce CVE-2013-4286
Apache Tomcat: data injection via Content-Length
Synthesis of the vulnerability
An attacker can use two Content-Length headers in order to alter behaviour of HTTP data analysis.Impacted products: Tomcat
, Red Hat JBoss EAP
BID-65773, CERTFR-2014-AVI-244, CVE-2013-4286, DSA-2897-1, FEDORA-2014-11048, RHSA-2014:0343-01, RHSA-2014:0344-01, RHSA-2014:0345-01, RHSA-2014:0373-01, RHSA-2014:0374-01, RHSA-2014:0429-01, RHSA-2014:0458-01, RHSA-2014:0459-01, RHSA-2014:0511-01, RHSA-2014:0525-01, RHSA-2014:0526-01, RHSA-2014:0527-01, RHSA-2014:0528-01, RHSA-2014:0686-01, SB10079, USN-2130-1, VIGILANCE-VUL-14307.
Description of the vulnerability
The Content-Length header indicates size of HTTP data.
When two or several Content-Length headers are present, each entity (client, proxy, server) can take a different decision:
- use first value
- use last value
These different behaviors for example permit to inject data to corrupt a cache or obtain sensitive information (VIGILANCE-VUL-4047, VIGILANCE-VUL-6675).
The HTTP and AJP connectors of Tomcat server do not ignore these multiple headers, and are thus impacted by this attack family.Complete Vigil@nce bulletin....
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