org.apache.http.conn.ssl.AbstractVerifier in Apache HttpComponents HttpClient before 4.3.5 and HttpAsyncClient before 4.0.2 does not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a "CN=" string in a field in the distinguished name (DN) of a certificate, as demonstrated by the "foo,CN=www.apache.org" string in the O field.

Affected: Ubuntu:14.04:LTS: commons-httpclient

It was discovered that Apache Commons HttpClient did not properly verify the Common Name or subjectAltName fields of X.509 certificates. An attacker could exploit this to perform a machine-in-the-middle attack to view sensitive information or alter encrypted communications. This issue only affected Ubuntu 12.04 LTS. (CVE-2012-5783)

Florian Weimer discovered the fix for CVE-2012-5783 was incomplete for Apache Commons HttpClient. An attacker could exploit this to perform a machine-in-the-middle attack to view sensitive information or alter encrypted communications. This issue only affected Ubuntu 12.04 LTS. (CVE-2012-6153)

Subodh Iyengar and Will Shackleton discovered the fix for CVE-2012-5783 was incomplete for Apache Commons HttpClient. An attacker could exploit this to perform a machine-in-the-middle attack to view sensitive information or alter encrypted communications. (CVE-2014-3577)

It was discovered that Apache Commons HttpClient did not properly handle read timeouts during HTTPS handshakes. A remote attacker could trigger this flaw to cause a denial of service. (CVE-2015-5262)