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The SMB1 protocol implementation in Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not recognize the "server signing = mandatory" setting, which allows man-in-the-middle attackers to spoof SMB servers by modifying the client-server data stream.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade samba | Sep 20, 2017 | Apr 24, 2016 |
| Centos_linux | — | Upgrade libwbclient-develUpgrade samba-common-toolsUpgrade samba-winbind-krb5-locatorUpgrade samba-test-develUpgrade ctdb-testsUpgrade samba-winbind-modulesUpgrade samba-client-libsUpgrade libsmbclientUpgrade samba-vfs-glusterfsUpgrade ctdb-develUpgrade samba-dc-libsUpgrade samba-libsUpgrade samba-pythonUpgrade samba-develUpgrade samba-winbind-clientsUpgrade libwbclientUpgrade sambaUpgrade samba-winbindUpgrade samba-commonUpgrade samba-common-libsUpgrade samba-clientUpgrade ctdbUpgrade samba-test-libsUpgrade samba-dcUpgrade samba-pidlUpgrade libsmbclient-develUpgrade samba-test | Jul 6, 2016 | Apr 13, 2016 |
| Debian | — | Upgrade samba | Apr 14, 2016 | Apr 13, 2016 |
| Freebsd | — | Upgrade samba44Upgrade samba36Upgrade samba4Upgrade samba43Upgrade samba41Upgrade samba42 | Dec 10, 2025 | Apr 12, 2016 |
| Gentoo Linux | — | Upgrade net-fs/samba. | Oct 30, 2017 | Apr 24, 2016 |
| Huawei Euleros 2_0_sp1 | — | Upgrade samba-pythonUpgrade sambaUpgrade samba-winbindUpgrade samba-winbind-clientsUpgrade samba-client-libsUpgrade samba-libsUpgrade libtallocUpgrade samba-commonUpgrade python-teventUpgrade samba-common-toolsUpgrade samba-common-libsUpgrade samba-winbind-modulesUpgrade libsmbclientUpgrade libldbUpgrade tdb-toolsUpgrade pytallocUpgrade python-tdbUpgrade samba-clientUpgrade libwbclientUpgrade libteventUpgrade libtdb | Nov 30, 2017 | Apr 24, 2016 |
| Oracle Solaris | — | Upgrade service/network/samba to version 4.4.5-0.175.3.14.0.1.0 on Solaris 11.3Upgrade library/samba/libsmbclient to version 4.4.5-0.175.3.14.0.1.0 on Solaris 11.3 | May 29, 2017 | Apr 24, 2016 |
| Oracle_linux | — | Upgrade samba4-pidlUpgrade openchange-devel-docsUpgrade pytalloc-develUpgrade libtalloc-develUpgrade sambaUpgrade libtdb-develUpgrade samba-common-toolsUpgrade samba-testUpgrade samba-commonUpgrade libwbclientUpgrade samba-libsUpgrade python-tdbUpgrade samba-develUpgrade samba4-libsUpgrade samba4-pythonUpgrade ipa-pythonUpgrade samba4-dcUpgrade libldbUpgrade ldb-toolsUpgrade samba4-winbindUpgrade libsmbclient-develUpgrade samba4-winbind-clientsUpgrade samba-vfs-glusterfsUpgrade openchangeUpgrade samba4Upgrade samba-dcUpgrade samba-test-libsUpgrade tdb-toolsUpgrade ipa-server-trust-adUpgrade samba4-clientUpgrade ipa-admintoolsUpgrade samba-clientUpgrade ctdbUpgrade samba-pidlUpgrade pytallocUpgrade ipa-server-dnsUpgrade samba-winbindUpgrade samba-winbind-krb5-locatorUpgrade ctdb-testsUpgrade samba4-testUpgrade python-teventUpgrade ctdb-develUpgrade libsmbclientUpgrade libwbclient-develUpgrade ipa-clientUpgrade samba-common-libsUpgrade openchange-clientUpgrade pyldbUpgrade samba-winbind-modulesUpgrade samba-client-libsUpgrade libtdbUpgrade samba-winbind-clientsUpgrade openchange-develUpgrade libtevent-develUpgrade samba4-develUpgrade samba4-commonUpgrade libldb-develUpgrade libtallocUpgrade ipa-server-selinuxUpgrade samba-pythonUpgrade samba-dc-libsUpgrade samba4-winbind-krb5-locatorUpgrade ipa-serverUpgrade samba-test-develUpgrade pyldb-develUpgrade libteventUpgrade samba4-dc-libs | Apr 13, 2016 | Apr 13, 2016 |
| Samba | — | Upgrade to Samba version 4.3.8Upgrade to Samba version 4.4.2Upgrade to Samba version 4.2.11 | Apr 12, 2016 | Apr 12, 2016 |
| Suse | — | Upgrade libsmbclient0Upgrade libndr-nbt0Upgrade libndr-nbt0-debuginfo-32bitUpgrade libsmbconf0-32bitUpgrade libsmbldap0-debuginfoUpgrade libtevent-util0-debuginfo-32bitUpgrade ctdb-testsUpgrade libsamdb0Upgrade libsamba-passdb0-debuginfoUpgrade samba-winbind-debuginfo-32bitUpgrade libndr0-32bitUpgrade sambaUpgrade samba-client-debuginfoUpgrade libgensec0-debuginfo-32bitUpgrade libregistry0-debuginfo-32bitUpgrade samba-debugsourceUpgrade libtevent-util0Upgrade samba-core-develUpgrade libdcerpc-atsvc0-32bitUpgrade ctdb-pcp-pmdaUpgrade libsamba-credentials0-32bitUpgrade libsamba-credentials-develUpgrade libnetapi-develUpgrade libdcerpc-samr0-32bitUpgrade libndr-nbt-develUpgrade libdcerpc-binding0Upgrade samba-pythonUpgrade libsmbclient0-debuginfo-32bitUpgrade samba-debuginfoUpgrade libsamba-util0-debuginfoUpgrade libwbclient0-debuginfoUpgrade libdcerpc-atsvc0-debuginfoUpgrade libdcerpc-samr0-debuginfoUpgrade libregistry-develUpgrade samba-winbindUpgrade libsamba-util-develUpgrade libsamba-util0Upgrade samba-winbind-debuginfoUpgrade libsamba-hostconfig0-debuginfoUpgrade libsamba-passdb0-32bitUpgrade samba-libs-32bitUpgrade libwbclient-develUpgrade libsmbclient-raw0Upgrade libsmbclient-raw0-32bitUpgrade libdcerpc-atsvc0Upgrade libdcerpc-develUpgrade libndr-nbt0-debuginfoUpgrade libndr-krb5pac0Upgrade libsamba-policy0-debuginfoUpgrade libndr-krb5pac-develUpgrade libgensec0Upgrade libdcerpc0-32bitUpgrade libndr-develUpgrade libsmbclient0-32bitUpgrade libwbclient0-debuginfo-32bitUpgrade libsamdb0-debuginfoUpgrade libdcerpc-samr-develUpgrade libsmbconf0-debuginfoUpgrade libsamba-policy0-debuginfo-32bitUpgrade libndr-krb5pac0-debuginfoUpgrade libtevent-util0-32bitUpgrade ctdb-develUpgrade libsamba-policy-develUpgrade libdcerpc-binding0-debuginfo-32bitUpgrade libsmbclient-raw0-debuginfo-32bitUpgrade libwbclient0-32bitUpgrade samba-clientUpgrade libsmbconf-develUpgrade libdcerpc0-debuginfoUpgrade ctdb-debuginfoUpgrade libsmbldap0Upgrade samba-winbind-32bitUpgrade libsamba-credentials0-debuginfoUpgrade libnetapi0Upgrade libsamba-hostconfig0-32bitUpgrade samba-docUpgrade libwbclient0Upgrade samba-debuginfo-32bitUpgrade libndr-standard0-debuginfoUpgrade libgensec-develUpgrade libtevent-util-develUpgrade samba-libs-debuginfo-32bitUpgrade libregistry0-32bitUpgrade libnetapi0-debuginfoUpgrade libndr-krb5pac0-debuginfo-32bitUpgrade libnetapi0-32bitUpgrade libsamba-hostconfig-develUpgrade libsamba-passdb-develUpgrade libndr0Upgrade samba-testUpgrade libndr0-debuginfoUpgrade libndr-standard0-32bitUpgrade libsmbldap-develUpgrade libsamba-util0-debuginfo-32bitUpgrade samba-client-32bitUpgrade libsamdb0-32bitUpgrade libsmbldap0-debuginfo-32bitUpgrade ctdb-pcp-pmda-debuginfoUpgrade libdcerpc-samr0Upgrade libsmbconf0Upgrade libsamba-policy0-32bitUpgrade libsamba-passdb0Upgrade samba-test-develUpgrade libdcerpc-samr0-debuginfo-32bitUpgrade libndr-standard0Upgrade libregistry0Upgrade libgensec0-32bitUpgrade libdcerpc0Upgrade libsamdb0-debuginfo-32bitUpgrade ctdb-tests-debuginfoUpgrade libdcerpc-binding0-debuginfoUpgrade samba-python-debuginfoUpgrade libdcerpc0-debuginfo-32bitUpgrade libdcerpc-atsvc0-debuginfo-32bitUpgrade libndr-krb5pac0-32bitUpgrade libsamba-credentials0-debuginfo-32bitUpgrade libsmbclient-develUpgrade libsmbclient-raw0-debuginfoUpgrade libsamba-util0-32bitUpgrade libnetapi0-debuginfo-32bitUpgrade libgensec0-debuginfoUpgrade libsmbclient0-debuginfoUpgrade libndr-standard0-debuginfo-32bitUpgrade libndr-standard-develUpgrade libsamdb-develUpgrade libndr0-debuginfo-32bitUpgrade ctdbUpgrade samba-test-debuginfoUpgrade libsamba-policy0Upgrade samba-libsUpgrade libsmbldap0-32bitUpgrade libsmbclient-raw-develUpgrade samba-32bitUpgrade libsamba-hostconfig0-debuginfo-32bitUpgrade samba-pidlUpgrade samba-libs-debuginfoUpgrade libdcerpc-atsvc-develUpgrade libsmbconf0-debuginfo-32bitUpgrade libdcerpc-binding0-32bitUpgrade samba-client-debuginfo-32bitUpgrade libsamba-hostconfig0Upgrade libsamba-passdb0-debuginfo-32bitUpgrade libsamba-credentials0Upgrade libndr-nbt0-32bitUpgrade libtevent-util0-debuginfoUpgrade libregistry0-debuginfo | Apr 20, 2016 | Apr 20, 2016 |
| Ubuntu | — | Upgrade samba | Apr 24, 2016 | Apr 24, 2016 |
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