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Vulnerability of OpenSAML Java: incomplete certificate validation

Synthesis of the vulnerability 

An attacker can use any valid certificate on a malicious server, and then invite an Apache HttpClient 3 to connect there, in order to spy communications even if encryption is used.
Impacted software: Fedora, Tivoli Storage Manager, WebSphere AS Liberty, Mule ESB, OpenSAML-J.
Severity of this computer vulnerability: 2/4.
Creation date: 07/08/2015.
Références of this announce: 5695611, 5695629, 5695653, 5695851, 964764, CVE-2014-3603, FEDORA-2015-10175, FEDORA-2015-10235, VIGILANCE-VUL-17608.

Description of the vulnerability 

The OpenSAML Java library can manage HTTP connections over SSL, using Apache HttpClient 3 (VIGILANCE-VUL-12182).

In order to authenticate a server, the client must check the certificate (cryptographic signatures, validity date range, etc.) and also that the received certificate matches the visited server. This check is usually done on DNS names, or sometimes on IP addresses. However, HttpClient does not check that the names included in the certificates match the one requested at HTTP level. So, any valid certificate is accepted.

An attacker can therefore use any valid certificate on a malicious server, and then invite an OpenSAML Java to connect there, in order to spy communications even if encryption is used.
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This computer vulnerability impacts software or systems such as Fedora, Tivoli Storage Manager, WebSphere AS Liberty, Mule ESB, OpenSAML-J.

Our Vigil@nce team determined that the severity of this weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this weakness.

Solutions for this threat 

OpenSAML Java: version 2.6.2.
The version 2.6.2 is fixed:
  http://shibboleth.net/downloads/java-opensaml/2.6.2/

Fedora: new opensaml-java-openws packages.
New packages are available:
  Fedora 21: opensaml-java-openws 1.5.5-2.fc21
  Fedora 22: opensaml-java-openws 1.5.5-2.fc22

Fedora: new opensaml-java packages.
New packages are available:
  Fedora 21: opensaml-java 2.5.3-9.fc21
  Fedora 22: opensaml-java 2.5.3-9.fc22

IBM Spectrum Protect: fixed versions.
Fixed versions are indicated in information sources.

Mule ESB: version 3.5.4.
The version 3.5.4 is fixed:
  https://www.mulesoft.com/

Mule ESB: version 3.7.3.
The version 3.7.3 is fixed:
  https://www.mulesoft.com/

WebSphere AS Liberty: patch for OpenSAML Java.
A patch is indicated in information sources.
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