(PT-2013-22) Positive Technologies Security Advisory
XML External Entity Injection in Trustwave ModSecurity

Vulnerable software

Trustwave ModSecurity
Version: 2.7.2 and earlier

Application link:
http://www.modsecurity.org

Severity level

Severity level: High
Impact: Internal Network Resources and File System Access, Denial of Service
Access Vector: Remote

CVSS v2:
Base Score: 10
Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVE: not assigned

Software description

Trustwave ModSecurity is a web application layer firewall.

Vulnerability description

Positive Research Center experts have discovered "XML External Entity Injection" vulnerability in Trustwave ModSecurity.

If an attacker sends specially crafted request containing malformed XML to server with ModSecurity, the server will automatically send the contents of local or remote resources to the attacker's server. It also makes possible to conduct denial of service attacks.

How to fix

Update your software up to the latest version.

Advisory status

27.02.2013 - Vendor gets vulnerability details
29.03.2013 - Vendor releases fixed version and details
01.04.2013 - Public disclosure

Credits

The vulnerability was discovered by Timur Yunusov, Alexey Osipov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2013-22

Reports on the vulnerabilities previously discovered by Positive Research:

http://ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/

About Positive Technologies

Positive Technologies www.ptsecurity.com is among the key players in the IT security market in Russia.

The principal activities of the company include the development of integrated tools for information security monitoring (MaxPatrol); providing IT security consulting services and technical support; development of the Securitylab leading Russian information security portal.

Among the clients of Positive Technologies, there are more than 40 state enterprises, more than 50 banks and financial organizations, 20 telecommunication companies, more than 40 plant facilities, as well as IT, service and retail companies from Russia, the CIS countries, the Baltic States, China, Ecuador, Germany, Great Britain, Holland, Iran, Israel, Japan, Mexico, the Republic of South Africa, Thailand, Turkey, and the USA.

Positive Technologies is a team of highly skilled developers, advisers and experts with years of vast hands-on experience. The company specialists possess professional titles and certificates; they are the members of various international societies and are actively involved in the IT security field development.