Apache Commons HttpClient 3.x, as used in Amazon Flexible Payments Service (FPS) merchant Java SDK and other products, does not 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 an arbitrary valid certificate.

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)