CVE-2021-32919

An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled).

Summary:

An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled).

Reference Links(if available):

  • https://blog.prosody.im/prosody-0.11.9-released/
  • http://www.openwall.com/lists/oss-security/2021/05/13/1
  • http://www.openwall.com/lists/oss-security/2021/05/14/2
  • https://www.debian.org/security/2021/dsa-4916
  • https://lists.fedoraproject.org/archives/list/[email protected]/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
  • CVSS Score (if available)

    v2: / HIGHAV:N/AC:M/Au:N/C:P/I:N/A:N

    v3: / HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

    Links to Exploits(if available)