# CVE-2018-16860: ctdb: A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excludin... CVE-2018-16860 is fixed in 39 products on 1 platform, first by ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.10, released May 13, 2019. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2018-16860 - Priority: Routine - CVSS: n/a (Medium) - EPSS: 0.0249 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 13, 2019 ## Description A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | ctdb Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ctdb-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | heimdal-clients Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-clients 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-clients-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | heimdal-docs Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-docs 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-docs-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | heimdal-kcm Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-kcm 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-kcm-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | heimdal-kdc Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-kdc 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-kdc-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | heimdal-multidev Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-multidev 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-multidev-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | heimdal-servers Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [heimdal-servers 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-servers-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libasn1-8-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libasn1-8-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libasn1-8-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libgssapi3-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libgssapi3-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgssapi3-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libhcrypto4-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libhcrypto4-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhcrypto4-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libhdb9-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libhdb9-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhdb9-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libheimbase1-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libheimbase1-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheimbase1-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libheimntlm0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libheimntlm0-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheimntlm0-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libhx509-5-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libhx509-5-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhx509-5-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libkadm5clnt7-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libkadm5clnt7-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkadm5clnt7-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libkadm5srv8-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libkadm5srv8-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkadm5srv8-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libkafs0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libkafs0-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkafs0-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libkdc2-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libkdc2-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkdc2-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libkrb5-26-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libkrb5-26-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkrb5-26-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libnss-winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [libnss-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | libotp0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libotp0-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libotp0-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libpam-winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpam-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | libparse-pidl-perl Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [libparse-pidl-perl 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libparse-pidl-perl-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | libroken18-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libroken18-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libroken18-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libsl0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libsl0-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsl0-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | libsmbclient Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsmbclient-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | libwbclient0 Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [libwbclient0 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwbclient0-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | libwind0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.1 | [libwind0-heimdal 7.5.0+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwind0-heimdal-7.5.0-dfsg-1ubuntu0.1.md) | Oct 6, 2022 | | Linux | python-samba Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [python-samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-samba-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | registry-tools Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [registry-tools 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-registry-tools-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-common Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-common 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-common-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-common-bin Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-common-bin 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-common-bin-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-dsdb-modules Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-dsdb-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-dsdb-modules-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-libs Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-libs 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-libs-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-testsuite Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-testsuite 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-testsuite-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | samba-vfs-modules Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [samba-vfs-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-samba-vfs-modules-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | smbclient Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [smbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-smbclient-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | | Linux | winbind Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 | [winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.10](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-winbind-2-4.7.6-dfsg-ubuntu-0ubuntu2.10.md) | May 13, 2019 | --- Data as of 2026-11-07T18:46:35Z UTC. 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