The Prosody security advisory 2021-05-12 reports:
This advisory details 5 new security vulnerabilities discovered in the
Prosody.im XMPP server software. All issues are fixed in the 0.11.9
release default configuration.
- CVE-2021-32918: DoS via insufficient memory consumption controls
- CVE-2021-32920: DoS via repeated TLS renegotiation causing excessive CPU consumption
- CVE-2021-32921: Use of timing-dependent string comparison with sensitive values
- CVE-2021-32917: Use of mod_proxy65 is unrestricted in default configuration
- CVE-2021-32919: Undocumented dialback-without-dialback option insecure