Auth/Yadis/XML.php in PHP OpenID Library 2.2.2 and earlier allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of service (CPU and memory consumption) via XRDS data containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.

References

• https://nvd.nist.gov/vuln/detail/CVE-2013-4701
• openid/php-openid@625c16b
• http://jvn.jp/en/jp/JVN24713981/index.html
• http://jvndb.jvn.jp/jvndb/JVNDB-2013-000080
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00028.html
• http://lists.opensuse.org/opensuse-updates/2016-08/msg00083.html
• https://github.com/FriendsOfPHP/security-advisories/blob/master/openid/php-openid/CVE-2013-4701.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2013-4701.yaml
• https://typo3.org/security/advisory/typo3-core-sa-2014-002