{"id":"UBUNTU-CVE-2021-32918","details":"An issue was discovered in Prosody before 0.11.9. Default settings are susceptible to remote unauthenticated denial-of-service (DoS) attacks via memory exhaustion when running under Lua 5.2 or Lua 5.3.","modified":"2025-10-24T04:50:21Z","published":"2021-05-13T16:15:00Z","upstream":["CVE-2021-32918"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-32918"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/05/13/1"},{"type":"REPORT","url":"https://prosody.im/security/advisory_20210512.txt"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/db8e41eb6eff"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/b0d8920ed5e5"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/929de6ade6b6"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/63fd4c8465fb"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/1937b3c3efb5"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/3413fea9e6db"},{"type":"REPORT","url":"https://blog.prosody.im/prosody-0.11.9-released/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-32918"}],"affected":[{"package":{"name":"prosody","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/prosody@0.9.10-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.8-1","0.9.9-1","0.9.10-1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.9.10-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32918.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/prosody@0.10.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.12-2","0.10.0-1","0.10.0-1build1","0.10.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.10.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32918.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/prosody@0.11.4-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.2-1","0.11.3-1","0.11.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.11.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32918.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/prosody@0.11.13-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.10-1","0.11.10-1build1","0.11.10-1build2","0.11.11-1","0.11.11-2","0.11.12-1","0.11.13-1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.11.13-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32918.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}