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Computer vulnerabilities of WebSphere Enterprise Service Bus

vulnerability announce CVE-2012-5783

Apache HttpClient 3: 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 products: Apache HttpClient, Fedora, Tivoli System Automation, WebSphere AS Traditional, IBM WebSphere ESB, openSUSE, RHEL, JBoss EAP by Red Hat, Ubuntu.
Severity: 2/4.
Consequences: data reading.
Provenance: internet server.
Creation date: 23/11/2012.
Identifiers: 2016216, BID-58073, CVE-2012-5783, FEDORA-2013-1189, FEDORA-2013-1203, FEDORA-2013-1289, HTTPCLIENT-1265, ibm10719287, ibm10719297, ibm10719301, ibm10719303, ibm10719307, openSUSE-SU-2013:0354-1, openSUSE-SU-2013:0622-1, openSUSE-SU-2013:0623-1, openSUSE-SU-2013:0638-1, RHSA-2013:0270-01, RHSA-2013:0679-01, RHSA-2013:0680-01, RHSA-2013:0681-01, RHSA-2013:0682-01, RHSA-2013:0763-01, RHSA-2013:1006-01, RHSA-2013:1147-01, RHSA-2013:1853-01, RHSA-2014:0224-01, RHSA-2017:0868-01, swg22017526, USN-2769-1, VIGILANCE-VUL-12182.

Description of the vulnerability

The HttpClient library can manage HTTP connections over SSL.

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 Apache HttpClient 3 to connect there, in order to spy communications even if encryption is used.
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