The _ssl_verify_callback function in tls_nb.py in Gajim before 0.15.3
does not properly verify SSL certificates, which allows remote
attackers to conduct man-in-the-middle (MITM) attacks and spoof
servers via an arbitrary certificate from a trusted CA.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20121111 Gajim fails to handle invalid certificates
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