| Package | Affected versions | Patched versions |
|---|---|---|
| org.igniterealtime.smack:smack-core | < 4.1.9 | 4.1.9 |
| smack | < 4.1.9 | 4.1.9 |
Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.
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