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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 samba-winbindUpgrade sambaUpgrade samba-dc-libsUpgrade samba-commonUpgrade samba-libsUpgrade libsmbclient-develUpgrade samba-dcUpgrade libwbclientUpgrade ctdb-develUpgrade samba-test-libsUpgrade samba-clientUpgrade samba-pythonUpgrade samba-develUpgrade samba-vfs-glusterfsUpgrade samba-testUpgrade ctdbUpgrade samba-pidlUpgrade samba-common-libsUpgrade samba-winbind-clientsUpgrade samba-client-libsUpgrade libsmbclientUpgrade samba-test-develUpgrade samba-winbind-krb5-locatorUpgrade ctdb-testsUpgrade samba-winbind-modulesUpgrade samba-common-toolsUpgrade libwbclient-devel | Jul 6, 2016 | Apr 13, 2016 |
| Debian | — | Upgrade samba | Apr 14, 2016 | Apr 13, 2016 |
| Freebsd | — | Upgrade samba42Upgrade samba41Upgrade samba43Upgrade samba4Upgrade samba36Upgrade samba44 | Dec 10, 2025 | Apr 12, 2016 |
| Gentoo Linux | — | Upgrade net-fs/samba. | Oct 30, 2017 | Apr 24, 2016 |
| Huawei Euleros 2_0_sp1 | — | Upgrade libteventUpgrade samba-clientUpgrade pytallocUpgrade libldbUpgrade libtdbUpgrade tdb-toolsUpgrade python-tdbUpgrade libwbclientUpgrade libtallocUpgrade samba-winbind-clientsUpgrade sambaUpgrade python-teventUpgrade libsmbclientUpgrade samba-libsUpgrade samba-common-toolsUpgrade samba-winbindUpgrade samba-winbind-modulesUpgrade samba-client-libsUpgrade samba-pythonUpgrade samba-common-libsUpgrade samba-common | Nov 30, 2017 | Apr 24, 2016 |
| Oracle Solaris | — | Upgrade library/samba/libsmbclient to version 4.4.5-0.175.3.14.0.1.0 on Solaris 11.3Upgrade service/network/samba 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 python-teventUpgrade libtdbUpgrade samba-winbindUpgrade ipa-server-selinuxUpgrade libsmbclientUpgrade ctdb-develUpgrade libwbclient-develUpgrade samba-pythonUpgrade ipa-serverUpgrade libteventUpgrade ctdb-testsUpgrade samba-winbind-krb5-locatorUpgrade pyldbUpgrade openchange-clientUpgrade samba-test-develUpgrade samba4-testUpgrade samba-client-libsUpgrade samba-dc-libsUpgrade pyldb-develUpgrade samba-winbind-modulesUpgrade libtevent-develUpgrade ipa-server-dnsUpgrade openchange-develUpgrade samba4-commonUpgrade samba4-develUpgrade samba-common-libsUpgrade libldb-develUpgrade samba-winbind-clientsUpgrade ipa-clientUpgrade samba4-winbind-krb5-locatorUpgrade samba4-dc-libsUpgrade libtallocUpgrade samba-testUpgrade ipa-server-trust-adUpgrade samba-test-libsUpgrade samba4-clientUpgrade samba4-winbindUpgrade samba-vfs-glusterfsUpgrade ldb-toolsUpgrade libtdb-develUpgrade sambaUpgrade samba4-libsUpgrade samba-libsUpgrade pytallocUpgrade python-tdbUpgrade libtalloc-develUpgrade samba-pidlUpgrade samba-dcUpgrade openchangeUpgrade openchange-devel-docsUpgrade samba-common-toolsUpgrade libsmbclient-develUpgrade samba4-pidlUpgrade samba4-winbind-clientsUpgrade samba-clientUpgrade ipa-pythonUpgrade pytalloc-develUpgrade ctdbUpgrade samba-develUpgrade tdb-toolsUpgrade samba4Upgrade samba4-dcUpgrade samba-commonUpgrade samba4-pythonUpgrade libwbclientUpgrade libldbUpgrade ipa-admintools | Apr 13, 2016 | Apr 13, 2016 |
| Samba | — | Upgrade to Samba version 4.2.11Upgrade to Samba version 4.3.8Upgrade to Samba version 4.4.2 | Apr 12, 2016 | Apr 12, 2016 |
| Suse | — | Upgrade ctdb-pcp-pmdaUpgrade libndr0-32bitUpgrade libdcerpc-atsvc0Upgrade libtevent-util0Upgrade samba-winbindUpgrade libdcerpc-atsvc0-32bitUpgrade libwbclient0-debuginfoUpgrade samba-client-debuginfoUpgrade libdcerpc-samr0-debuginfoUpgrade libsamba-util0Upgrade libsamba-credentials-develUpgrade libsamba-hostconfig0-debuginfoUpgrade samba-debugsourceUpgrade samba-core-develUpgrade libsmbldap0-debuginfoUpgrade libsmbclient0Upgrade libgensec0Upgrade libndr-krb5pac-develUpgrade libndr-nbt0Upgrade samba-pythonUpgrade libtevent-util0-debuginfo-32bitUpgrade libsamdb0-debuginfoUpgrade libsmbclient-raw0Upgrade libndr-nbt0-debuginfoUpgrade libdcerpc0-32bitUpgrade libdcerpc-binding0-debuginfo-32bitUpgrade libnetapi-develUpgrade libdcerpc-develUpgrade samba-libs-32bitUpgrade libnetapi0Upgrade libdcerpc-binding0Upgrade libregistry-develUpgrade libndr-nbt-develUpgrade samba-winbind-debuginfoUpgrade libregistry0-debuginfo-32bitUpgrade libsamba-credentials0-32bitUpgrade libdcerpc-samr0-32bitUpgrade libndr-krb5pac0-debuginfoUpgrade libwbclient0-debuginfo-32bitUpgrade libsamba-passdb0-32bitUpgrade libsamba-policy0-debuginfo-32bitUpgrade libsmbconf0-32bitUpgrade libsamdb0Upgrade ctdb-testsUpgrade libsmbclient-raw0-debuginfo-32bitUpgrade libtevent-util0-32bitUpgrade ctdb-debuginfoUpgrade libsamba-util-develUpgrade samba-winbind-32bitUpgrade libwbclient0-32bitUpgrade libsamba-util0-debuginfoUpgrade libsmbclient0-32bitUpgrade libdcerpc-samr-develUpgrade samba-clientUpgrade libgensec0-debuginfo-32bitUpgrade libsmbconf0-debuginfoUpgrade samba-docUpgrade libwbclient-develUpgrade libsmbconf-develUpgrade libsmbldap0Upgrade libsamba-policy0-debuginfoUpgrade ctdb-develUpgrade sambaUpgrade libdcerpc-atsvc0-debuginfoUpgrade samba-winbind-debuginfo-32bitUpgrade libdcerpc0-debuginfoUpgrade samba-debuginfoUpgrade libndr-nbt0-debuginfo-32bitUpgrade libndr-krb5pac0Upgrade libsmbclient-raw0-32bitUpgrade libndr-develUpgrade libsamba-policy-develUpgrade libsamba-credentials0-debuginfoUpgrade libsamba-hostconfig0-32bitUpgrade libsmbclient0-debuginfo-32bitUpgrade libsamba-passdb0-debuginfoUpgrade libdcerpc-atsvc0-debuginfo-32bitUpgrade libgensec0-debuginfoUpgrade libsmbconf0Upgrade libsmbldap0-debuginfo-32bitUpgrade libsamdb0-32bitUpgrade samba-client-32bitUpgrade ctdbUpgrade samba-pidlUpgrade ctdb-pcp-pmda-debuginfoUpgrade libsamba-policy0Upgrade libsmbconf0-debuginfo-32bitUpgrade libsamba-util0-32bitUpgrade libdcerpc-atsvc-develUpgrade libregistry0Upgrade libndr-krb5pac0-debuginfo-32bitUpgrade libdcerpc0Upgrade libsmbclient-raw-develUpgrade samba-libs-debuginfoUpgrade libsamba-policy0-32bitUpgrade libsamba-hostconfig0-debuginfo-32bitUpgrade samba-32bitUpgrade libdcerpc-samr0-debuginfo-32bitUpgrade libregistry0-32bitUpgrade libwbclient0Upgrade libnetapi0-debuginfoUpgrade libndr0-debuginfo-32bitUpgrade libsamba-passdb0Upgrade samba-libs-debuginfo-32bitUpgrade samba-libsUpgrade samba-test-develUpgrade libsamba-hostconfig-develUpgrade libsamdb-develUpgrade libndr0-debuginfoUpgrade libndr0Upgrade samba-testUpgrade libtevent-util0-debuginfoUpgrade samba-debuginfo-32bitUpgrade samba-client-debuginfo-32bitUpgrade libsamba-credentials0Upgrade libsamba-passdb0-debuginfo-32bitUpgrade libsamba-hostconfig0Upgrade libndr-nbt0-32bitUpgrade libndr-standard0-debuginfoUpgrade libgensec-develUpgrade libdcerpc-binding0-32bitUpgrade libregistry0-debuginfoUpgrade libgensec0-32bitUpgrade libsamba-util0-debuginfo-32bitUpgrade libsamdb0-debuginfo-32bitUpgrade libsamba-credentials0-debuginfo-32bitUpgrade libsmbclient0-debuginfoUpgrade libndr-krb5pac0-32bitUpgrade libndr-standard0-debuginfo-32bitUpgrade libnetapi0-32bitUpgrade libndr-standard-develUpgrade libnetapi0-debuginfo-32bitUpgrade libtevent-util-develUpgrade libsmbclient-raw0-debuginfoUpgrade libndr-standard0-32bitUpgrade libsmbldap-develUpgrade libndr-standard0Upgrade libsmbldap0-32bitUpgrade ctdb-tests-debuginfoUpgrade libdcerpc-binding0-debuginfoUpgrade samba-python-debuginfoUpgrade samba-test-debuginfoUpgrade libdcerpc0-debuginfo-32bitUpgrade libsamba-passdb-develUpgrade libsmbclient-develUpgrade libdcerpc-samr0 | Apr 20, 2016 | Apr 20, 2016 |
| Ubuntu | — | Upgrade samba | Apr 24, 2016 | Apr 24, 2016 |
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