Amazon Linux AMI : tomcat7 (ALAS-2015-526)

Medium Nessus Plugin ID 83496

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

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 found that the org.apache.catalina.servlets.DefaultServlet implementation in JBoss Web / Apache Tomcat allowed the definition of XML External Entities (XXEs) in provided XSLTs. A malicious application could use this to circumvent intended security restrictions to disclose sensitive information. (CVE-2014-0096)

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.
(CVE-2014-0099)

It was discovered that the ChunkedInputFilter in Tomcat did not fail subsequent attempts to read input after malformed chunked encoding was detected. A remote attacker could possibly use this flaw to make Tomcat process part of the request body as new request, or cause a denial of service. (CVE-2014-0227)

Solution

Run 'yum update tomcat7' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2015-526.html

Plugin Details

Severity: Medium

ID: 83496

File Name: ala_ALAS-2015-526.nasl

Version: 2.5

Type: local

Agent: unix

Published: 2015/05/18

Modified: 2018/04/18

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:tomcat7, p-cpe:/a:amazon:linux:tomcat7-admin-webapps, p-cpe:/a:amazon:linux:tomcat7-docs-webapp, p-cpe:/a:amazon:linux:tomcat7-el-2.2-api, p-cpe:/a:amazon:linux:tomcat7-javadoc, p-cpe:/a:amazon:linux:tomcat7-jsp-2.2-api, p-cpe:/a:amazon:linux:tomcat7-lib, p-cpe:/a:amazon:linux:tomcat7-log4j, p-cpe:/a:amazon:linux:tomcat7-servlet-3.0-api, p-cpe:/a:amazon:linux:tomcat7-webapps, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 2015/05/14

Reference Information

CVE: CVE-2014-0075, CVE-2014-0096, CVE-2014-0099, CVE-2014-0227

ALAS: 2015-526