ctdb: Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service
CVE-2018-16851 is fixed in 17 products on 1 platform, first by ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.5, released November 26, 2018. It is not reported as exploited. Patch Radar priority: Routine.
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ctdb · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| libnss-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | libnss-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| libpam-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| libparse-pidl-perl · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | libparse-pidl-perl 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| libsmbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| libwbclient0 · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | libwbclient0 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| python-samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | python-samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| registry-tools · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | registry-tools 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-common · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-common 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-common-bin · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-common-bin 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-dsdb-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-dsdb-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-libs · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-libs 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-testsuite · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-testsuite 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| samba-vfs-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | samba-vfs-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| smbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | smbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
| winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.5 | Nov 26, 2018 |
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