{"id":"USN-5828-1","summary":"krb5 vulnerabilities","details":"It was discovered that Kerberos incorrectly handled certain S4U2Self\nrequests. An attacker could possibly use this issue to cause a denial of\nservice. This issue was only addressed in Ubuntu 16.04 ESM and Ubuntu\n18.04 LTS. (CVE-2018-20217)\n\nGreg Hudson discovered that Kerberos PAC implementation incorrectly\nhandled certain parsing operations. A remote attacker could use this\nissue to cause a denial of service, or possibly execute arbitrary code.\n(CVE-2022-42898)\n","modified":"2026-05-20T16:03:17.978408317Z","published":"2023-01-25T20:14:24Z","related":["UBUNTU-CVE-2018-20217","UBUNTU-CVE-2022-42898"],"upstream":["CVE-2018-20217","CVE-2022-42898","UBUNTU-CVE-2018-20217","UBUNTU-CVE-2022-42898"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5828-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20217"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-42898"}],"affected":[{"package":{"name":"krb5","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=trusty%2Fesm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12+dfsg-2ubuntu5.4+esm3"}]}],"versions":["1.10.1+dfsg-6.1ubuntu1","1.11.3+dfsg-3ubuntu2","1.12+dfsg-2ubuntu1","1.12+dfsg-2ubuntu2","1.12+dfsg-2ubuntu3","1.12+dfsg-2ubuntu4","1.12+dfsg-2ubuntu4.2","1.12+dfsg-2ubuntu5","1.12+dfsg-2ubuntu5.1","1.12+dfsg-2ubuntu5.2","1.12+dfsg-2ubuntu5.3","1.12+dfsg-2ubuntu5.4","1.12+dfsg-2ubuntu5.4+esm1","1.12+dfsg-2ubuntu5.4+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-admin-server"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-gss-samples"},{"binary_name":"krb5-kdc","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-kdc-ldap"},{"binary_name":"krb5-locales","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-multidev"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-otp"},{"binary_name":"krb5-pkinit","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"krb5-user"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libgssapi-krb5-2"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libgssrpc4"},{"binary_name":"libk5crypto3","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libkadm5clnt-mit9"},{"binary_name":"libkadm5srv-mit8","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_name":"libkadm5srv-mit9","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libkdb5-7"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libkrad0"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm3","binary_name":"libkrb5-3"},{"binary_name":"libkrb5support0","binary_version":"1.12+dfsg-2ubuntu5.4+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5828-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2022-42898"}]}}},{"package":{"name":"krb5","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.2+dfsg-5ubuntu2.2+esm3"}]}],"versions":["1.13.2+dfsg-2","1.13.2+dfsg-3","1.13.2+dfsg-4","1.13.2+dfsg-5","1.13.2+dfsg-5ubuntu1","1.13.2+dfsg-5ubuntu2","1.13.2+dfsg-5ubuntu2.1","1.13.2+dfsg-5ubuntu2.1+esm1","1.13.2+dfsg-5ubuntu2.2","1.13.2+dfsg-5ubuntu2.2+esm1","1.13.2+dfsg-5ubuntu2.2+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libkadm5srv-mit9","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-user"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"libgssrpc4"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"libkrb5support0"},{"binary_name":"libk5crypto3","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-pkinit"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"libkrb5-3"},{"binary_name":"krb5-kdc-ldap","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-otp"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"libkadm5clnt-mit9"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-gss-samples"},{"binary_name":"krb5-multidev","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_name":"krb5-locales","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-kdc"},{"binary_name":"libkdb5-8","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_name":"krb5-k5tls","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_name":"libkrad0","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm3","binary_name":"krb5-admin-server"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5828-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[]}}},{"package":{"name":"krb5","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16-2ubuntu0.3"}]}],"versions":["1.15.1-2","1.16-2","1.16-2build1","1.16-2ubuntu0.1","1.16-2ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-admin-server"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-gss-samples"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-k5tls"},{"binary_name":"krb5-kdc","binary_version":"1.16-2ubuntu0.3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-kdc-ldap"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-kpropd"},{"binary_name":"krb5-locales","binary_version":"1.16-2ubuntu0.3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-multidev"},{"binary_name":"krb5-otp","binary_version":"1.16-2ubuntu0.3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"krb5-pkinit"},{"binary_name":"krb5-user","binary_version":"1.16-2ubuntu0.3"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.16-2ubuntu0.3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libgssrpc4"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libk5crypto3"},{"binary_name":"libkadm5clnt-mit11","binary_version":"1.16-2ubuntu0.3"},{"binary_name":"libkadm5srv-mit11","binary_version":"1.16-2ubuntu0.3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libkdb5-9"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libkrad0"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libkrb5-3"},{"binary_version":"1.16-2ubuntu0.3","binary_name":"libkrb5support0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5828-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2018-20217"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2022-42898"}]}}},{"package":{"name":"krb5","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17-6ubuntu4.2"}]}],"versions":["1.17-6","1.17-6ubuntu3","1.17-6ubuntu4","1.17-6ubuntu4.1"],"ecosystem_specific":{"availability":"No subscription 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