{"id":"CVE-2018-17187","aliases":["GHSA-xvch-r4wf-h8w9"],"url":"https://o3.security/vulnerability/CVE-2018-17187","summary":"Improper Certificate Validation in proton-j","details":"The Apache Qpid Proton-J transport includes an optional wrapper layer to perform TLS, enabled by use of the 'transport.ssl(...)' methods. Unless a verification mode was explicitly configured, client and server modes previously defaulted as documented to not verifying a peer certificate, with options to configure this explicitly or select a certificate verification mode with or without hostname verification being performed. The latter hostname verifying mode was not implemented in Apache Qpid Proton-J versions 0.3 to 0.29.0, with attempts to use it resulting in an exception. This left only the option to verify the certificate is trusted, leaving such a client vulnerable to Man In The Middle (MITM) attack. Uses of the Proton-J protocol engine which do not utilise the optional transport TLS wrapper are not impacted, e.g. usage within Qpid JMS. Uses of Proton-J utilising the optional transport TLS wrapper layer that wish to enable hostname verification must be upgraded to version 0.30.0 or later and utilise the VerifyMode#VERIFY_PEER_NAME configuration, which is now the default for client mode usage unless configured otherwise.","published":"2018-11-13T15:29:00.313Z","modified":"2026-10-24T10:30:35.525641017Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.qpid:proton-j","fixedVersion":"0.30.0"}],"fix":{"url":"https://github.com/apache/qpid-proton-j/commit/0cb8ca03cec42120dcfc434561592d89a89a805e","label":"apache/qpid-proton-j@0cb8ca0"},"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105935"},{"type":"ADVISORY","url":"https://issues.apache.org/jira/browse/PROTON-1962"},{"type":"ADVISORY","url":"https://mail-archives.apache.org/mod_mbox/qpid-users/201811.mbox/%3CCAFitrpQSV73Vz7rJYfLJK7gvEymZSCR5ooWUeU8j4jzRydk-eg%40mail.gmail.com%3E"},{"type":"ADVISORY","url":"https://qpid.apache.org/cves/CVE-2018-17187.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-17187"},{"type":"WEB","url":"https://github.com/apache/qpid-proton-j/commit/0cb8ca03cec42120dcfc434561592d89a89a805e"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-xvch-r4wf-h8w9"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:35.525641017Z"}}