{"id":"UBUNTU-CVE-2018-5709","details":"An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable \"dbentry-\u003en_key_data\" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a \"u4\" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.","modified":"2026-09-15T08:30:54.457862474Z","published":"2018-01-16T09:29:00Z","upstream":["CVE-2018-5709"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-5709"},{"type":"REPORT","url":"https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Integer%20Overflow"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-5709"}],"affected":[{"package":{"name":"krb5","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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","1.12+dfsg-2ubuntu5.4+esm3","1.12+dfsg-2ubuntu5.4+esm4","1.12+dfsg-2ubuntu5.4+esm5","1.12+dfsg-2ubuntu5.4+esm6","1.12+dfsg-2ubuntu5.4+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"1.12+dfsg-2ubuntu5.4+esm7","binary_name":"krb5-admin-server"},{"binary_name":"krb5-gss-samples","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"krb5-kdc","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm7","binary_name":"krb5-kdc-ldap"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm7","binary_name":"krb5-locales"},{"binary_name":"krb5-multidev","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"krb5-otp","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"krb5-pkinit","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm7","binary_name":"krb5-user"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libgssrpc4","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libk5crypto3","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_version":"1.12+dfsg-2ubuntu5.4+esm7","binary_name":"libkadm5clnt-mit9"},{"binary_name":"libkadm5srv-mit8","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libkadm5srv-mit9","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libkdb5-7","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libkrad0","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libkrb5-3","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"},{"binary_name":"libkrb5support0","binary_version":"1.12+dfsg-2ubuntu5.4+esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json"}},{"package":{"name":"krb5","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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","1.13.2+dfsg-5ubuntu2.2+esm3","1.13.2+dfsg-5ubuntu2.2+esm4","1.13.2+dfsg-5ubuntu2.2+esm5","1.13.2+dfsg-5ubuntu2.2+esm6","1.13.2+dfsg-5ubuntu2.2+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"krb5-admin-server"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"krb5-gss-samples"},{"binary_name":"krb5-k5tls","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"krb5-kdc","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"krb5-kdc-ldap"},{"binary_name":"krb5-locales","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"krb5-multidev","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"krb5-otp"},{"binary_name":"krb5-pkinit","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"krb5-user"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"libgssrpc4","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"libk5crypto3"},{"binary_name":"libkadm5clnt-mit9","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"libkadm5srv-mit9","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7","binary_name":"libkdb5-8"},{"binary_name":"libkrad0","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"libkrb5-3","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"},{"binary_name":"libkrb5support0","binary_version":"1.13.2+dfsg-5ubuntu2.2+esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json"}},{"package":{"name":"krb5","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.1-2","1.16-2","1.16-2build1","1.16-2ubuntu0.1","1.16-2ubuntu0.1+esm1","1.16-2ubuntu0.2","1.16-2ubuntu0.3","1.16-2ubuntu0.4","1.16-2ubuntu0.4+esm1","1.16-2ubuntu0.4+esm2","1.16-2ubuntu0.4+esm3","1.16-2ubuntu0.4+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"krb5-admin-server","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"krb5-gss-samples","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-k5tls"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-kdc"},{"binary_name":"krb5-kdc-ldap","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-kpropd"},{"binary_name":"krb5-locales","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-multidev"},{"binary_name":"krb5-otp","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-pkinit"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"krb5-user"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"libgssapi-krb5-2"},{"binary_name":"libgssrpc4","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libk5crypto3","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libkadm5clnt-mit11","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libkadm5srv-mit11","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libkdb5-9","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libkrad0","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_name":"libkrb5-3","binary_version":"1.16-2ubuntu0.4+esm5"},{"binary_version":"1.16-2ubuntu0.4+esm5","binary_name":"libkrb5support0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json"}},{"package":{"name":"krb5","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-6","1.17-6ubuntu3","1.17-6ubuntu4","1.17-6ubuntu4.1","1.17-6ubuntu4.2","1.17-6ubuntu4.3","1.17-6ubuntu4.4","1.17-6ubuntu4.6","1.17-6ubuntu4.7","1.17-6ubuntu4.8","1.17-6ubuntu4.9","1.17-6ubuntu4.11"],"ecosystem_specific":{"binaries":[{"binary_name":"krb5-admin-server","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-gss-samples","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-k5tls","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-kdc","binary_version":"1.17-6ubuntu4.11"},{"binary_version":"1.17-6ubuntu4.11","binary_name":"krb5-kdc-ldap"},{"binary_name":"krb5-kpropd","binary_version":"1.17-6ubuntu4.11"},{"binary_version":"1.17-6ubuntu4.11","binary_name":"krb5-locales"},{"binary_name":"krb5-multidev","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-otp","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-pkinit","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"krb5-user","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.17-6ubuntu4.11"},{"binary_version":"1.17-6ubuntu4.11","binary_name":"libgssrpc4"},{"binary_name":"libk5crypto3","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"libkadm5clnt-mit11","binary_version":"1.17-6ubuntu4.11"},{"binary_version":"1.17-6ubuntu4.11","binary_name":"libkadm5srv-mit11"},{"binary_name":"libkdb5-9","binary_version":"1.17-6ubuntu4.11"},{"binary_name":"libkrad0","binary_version":"1.17-6ubuntu4.11"},{"binary_version":"1.17-6ubuntu4.11","binary_name":"libkrb5-3"},{"binary_name":"libkrb5support0","binary_version":"1.17-6ubuntu4.11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json"}},{"package":{"name":"krb5","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/krb5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.3-6","1.18.3-7","1.19.2-0ubuntu1","1.19.2-1","1.19.2-2","1.19.2-2ubuntu0.1","1.19.2-2ubuntu0.2","1.19.2-2ubuntu0.3","1.19.2-2ubuntu0.4","1.19.2-2ubuntu0.5","1.19.2-2ubuntu0.6","1.19.2-2ubuntu0.7","1.19.2-2ubuntu0.8","1.19.2-2ubuntu0.10"],"ecosystem_specific":{"binaries":[{"binary_name":"krb5-admin-server","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"krb5-gss-samples","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"krb5-k5tls","binary_version":"1.19.2-2ubuntu0.10"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"krb5-kdc"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"krb5-kdc-ldap"},{"binary_name":"krb5-kpropd","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"krb5-locales","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"krb5-multidev","binary_version":"1.19.2-2ubuntu0.10"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"krb5-otp"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"krb5-pkinit"},{"binary_name":"krb5-user","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"libgssrpc4","binary_version":"1.19.2-2ubuntu0.10"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"libk5crypto3"},{"binary_name":"libkadm5clnt-mit12","binary_version":"1.19.2-2ubuntu0.10"},{"binary_name":"libkadm5srv-mit12","binary_version":"1.19.2-2ubuntu0.10"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"libkdb5-10"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"libkrad0"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"libkrb5-3"},{"binary_version":"1.19.2-2ubuntu0.10","binary_name":"libkrb5support0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"negligible"}]}