{"id":"USN-5675-1","summary":"heimdal vulnerabilities","details":"Isaac Boukris and Andrew Bartlett discovered that Heimdal's KDC was\nnot properly performing checksum algorithm verifications in the\nS4U2Self extension module. An attacker could possibly use this issue\nto perform a machine-in-the-middle attack and request S4U2Self\ntickets for any user known by the application. This issue only\naffected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS.\n(CVE-2018-16860)\n\nIt was discovered that Heimdal was not properly handling the\nverification of key exchanges when an anonymous PKINIT was being\nused. An attacker could possibly use this issue to perform a\nmachine-in-the-middle attack and expose sensitive information.\nThis issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and\nUbuntu 18.04 LTS. (CVE-2019-12098)\n\nJoseph Sutton discovered that Heimdal was not properly handling\nmemory management operations when dealing with TGS-REQ tickets that\nwere missing information. An attacker could possibly use this issue\nto cause a denial of service. (CVE-2021-3671)\n\nMichał Kępień discovered that Heimdal was not properly handling\nlogical conditions that related to memory management operations. An\nattacker could possibly use this issue to cause a denial of service.\n(CVE-2022-3116)\n","modified":"2026-04-27T16:32:22.302290105Z","published":"2022-10-13T18:39:02Z","related":["UBUNTU-CVE-2018-16860","UBUNTU-CVE-2019-12098","UBUNTU-CVE-2021-3671","UBUNTU-CVE-2022-3116"],"upstream":["CVE-2018-16860","CVE-2019-12098","CVE-2021-3671","CVE-2022-3116","UBUNTU-CVE-2018-16860","UBUNTU-CVE-2019-12098","UBUNTU-CVE-2021-3671","UBUNTU-CVE-2022-3116"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5675-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16860"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-12098"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3671"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-3116"}],"affected":[{"package":{"name":"heimdal","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/heimdal@1.6~git20131207+dfsg-1ubuntu1.2+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6~git20131207+dfsg-1ubuntu1.2+esm1"}]}],"versions":["1.6~git20120403+dfsg1-3ubuntu0.1","1.6~git20120403+dfsg1-3ubuntu0.2","1.6~git20131207+dfsg-1ubuntu1","1.6~git20131207+dfsg-1ubuntu1.1","1.6~git20131207+dfsg-1ubuntu1.2"],"ecosystem_specific":{"availability":"Available 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