Libgadu, an open library for communicating using the protocol e-mail, was found to have missing the ssl certificate validation. The issue is that libgadu uses openSSL library for creating secure connections. A program using openSSL can perform SSL handshake by invoking the SSL_connect function. Some cetrificate validation errors are signaled through, the return values of the SSL_connect, while for the others errors SSL_connect returns OK but sets internal "verify result" flags. Application must call ssl_get_verify_result function to check if any such errors occurred. This check seems to be missing in libgadu. And thus a man-in-the-middle attack is possible failing all the SSL protection. Upstream suggested that it was a concious decision as libgadu is reverse-engineered implementation of a proprietary protocol, they had no control over the certificates used for SSL connections, so they would add a note to the documentation about this. References: http://seclists.org/oss-sec/2013/q4/202 https://bugzilla.novell.com/show_bug.cgi?id=848509 http://www.mail-archive.com/libgadu-devel@lists.ziew.org/msg01017.html
Created libgadu tracking bugs for this issue: Affects: fedora-all [bug 1025719]
Looks like these are relevant upstream commits: https://github.com/wojtekka/libgadu/commit/035e3cf6227995bdbe95f663a938a3838131e022 https://github.com/wojtekka/libgadu/commit/04bde7415ff0d87267a2dfd78aa3ba8da6434389 https://github.com/wojtekka/libgadu/commit/77fdc9351bf5c1913c7fc518f8a0c0c87ab3860f https://github.com/wojtekka/libgadu/commit/23644f1fb8219031b3cac93289a588b05f90226b https://github.com/wojtekka/libgadu/commit/d882b15661ee94949919ebbbc43edf0db5f619cb https://github.com/wojtekka/libgadu/commit/6516e57766b4fa39d1c5b37379ea72a330598a13 Hard to say if there are more as the changelog is not in english.
libgadu-1.12.0-0.2.rc1.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
libgadu-1.12.0-0.2.rc1.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
Can this be closed?