Vulnerabilities > CVE-2013-0239 - Improper Authentication vulnerability in Apache CXF
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
Apache CXF before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3, when the plaintext UsernameToken WS-SecurityPolicy is enabled, allows remote attackers to bypass authentication via a security header of a SOAP request containing a UsernameToken element that lacks a password child element.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Authentication Abuse An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Utilizing REST's Trust in the System Resource to Register Man in the Middle This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
- Man in the Middle Attack This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.
Nessus
| NASL family | Red Hat Local Security Checks |
| NASL id | REDHAT-RHSA-2013-0644.NASL |
| description | An updated apache-cxf package for JBoss Enterprise Application Platform 6.0.1 which fixes two security issues is now available for Red Hat Enterprise Linux 5 and 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. Apache CXF is an open source services framework. It was found that the Apache CXF UsernameTokenPolicyValidator and UsernameTokenInterceptor allowed a UsernameToken element with no password child element to bypass authentication. A remote attacker could use this flaw to circumvent access controls applied to web services by omitting the password in a UsernameToken. This flaw was exploitable on web services that rely on WS-SecurityPolicy plain text UsernameTokens to authenticate users. It was not exploitable when using hashed passwords or WS-Security without WS-SecurityPolicy. (CVE-2013-0239) If web services were deployed using Apache CXF with the WSS4JInInterceptor enabled to apply WS-Security processing, HTTP GET requests to these services were always granted access, without applying authentication checks. The URIMappingInterceptor is a legacy mechanism for allowing REST-like access (via GET requests) to simple SOAP services. A remote attacker could use this flaw to access the REST-like interface of a simple SOAP service using GET requests that bypass the security constraints applied by WSS4JInInterceptor. This flaw was only exploitable if WSS4JInInterceptor was used to apply WS-Security processing. Services that use WS-SecurityPolicy to apply security were not affected. (CVE-2012-5633) Warning: Before applying this update, back up your existing JBoss Enterprise Application Platform installation and deployed applications. All users of JBoss Enterprise Application Platform 6.0.1 on Red Hat Enterprise Linux 5 and 6 are advised to upgrade to this updated package. The JBoss server process must be restarted for the update to take effect. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 65544 |
| published | 2013-03-14 |
| reporter | This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/65544 |
| title | RHEL 5 / 6 : apache-cxf (RHSA-2013:0644) |
| code | |
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References
- http://www.securityfocus.com/bid/57876
- http://svn.apache.org/viewvc?view=revision&revision=1438424
- http://packetstormsecurity.com/files/120214/Apache-CXF-WS-Security-UsernameToken-Bypass.html
- http://cxf.apache.org/cve-2013-0239.html
- http://secunia.com/advisories/51988
- http://seclists.org/fulldisclosure/2013/Feb/39
- http://osvdb.org/90078
- http://rhn.redhat.com/errata/RHSA-2013-0749.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/81981
- https://lists.apache.org/thread.html/rfb87e0bf3995e7d560afeed750fac9329ff5f1ad49da365129b7f89e%40%3Ccommits.cxf.apache.org%3E
- https://lists.apache.org/thread.html/r36e44ffc1a9b365327df62cdfaabe85b9a5637de102cea07d79b2dbf%40%3Ccommits.cxf.apache.org%3E
- https://lists.apache.org/thread.html/rff42cfa5e7d75b7c1af0e37589140a8f1999e578a75738740b244bd4%40%3Ccommits.cxf.apache.org%3E
- https://lists.apache.org/thread.html/rec7160382badd3ef4ad017a22f64a266c7188b9ba71394f0d321e2d4%40%3Ccommits.cxf.apache.org%3E
- https://lists.apache.org/thread.html/rc774278135816e7afc943dc9fc78eb0764f2c84a2b96470a0187315c%40%3Ccommits.cxf.apache.org%3E
- https://lists.apache.org/thread.html/rd49aabd984ed540c8ff7916d4d79405f3fa311d2fdbcf9ed307839a6%40%3Ccommits.cxf.apache.org%3E