The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSP_NEGOTIATE_SEAL or NTLMSSP_NEGOTIATE_SIGN option to disrupt LDAP security.
CVSS Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | alpine-linux-upgrade-samba | Sep 20, 2017 | Apr 24, 2016 |
| Centos_linux | — | centos-upgrade-ctdbcentos-upgrade-ctdb-develcentos-upgrade-ctdb-testscentos-upgrade-libsmbclientcentos-upgrade-libsmbclient-develcentos-upgrade-libwbclientcentos-upgrade-libwbclient-develcentos-upgrade-sambacentos-upgrade-samba-clientcentos-upgrade-samba-client-libscentos-upgrade-samba-commoncentos-upgrade-samba-common-libscentos-upgrade-samba-common-toolscentos-upgrade-samba-dccentos-upgrade-samba-dc-libscentos-upgrade-samba-develcentos-upgrade-samba-doccentos-upgrade-samba-domainjoin-guicentos-upgrade-samba-glusterfscentos-upgrade-samba-libscentos-upgrade-samba-pidlcentos-upgrade-samba-pythoncentos-upgrade-samba-swatcentos-upgrade-samba-testcentos-upgrade-samba-test-develcentos-upgrade-samba-test-libscentos-upgrade-samba-vfs-glusterfscentos-upgrade-samba-winbindcentos-upgrade-samba-winbind-clientscentos-upgrade-samba-winbind-develcentos-upgrade-samba-winbind-krb5-locatorcentos-upgrade-samba-winbind-modulescentos-upgrade-samba3xcentos-upgrade-samba3x-clientcentos-upgrade-samba3x-commoncentos-upgrade-samba3x-doccentos-upgrade-samba3x-domainjoin-guicentos-upgrade-samba3x-swatcentos-upgrade-samba3x-winbindcentos-upgrade-samba3x-winbind-devel | Jul 6, 2016 | Apr 13, 2016 |
| Debian | debian-upgrade-samba | Apr 14, 2016 | Apr 13, 2016 | |
| F5 Big Ip | f5-bigip-upgrade-latest | Jun 17, 2026 | May 17, 2016 | |
| Freebsd | freebsd-upgrade-package-samba36freebsd-upgrade-package-samba4freebsd-upgrade-package-samba41freebsd-upgrade-package-samba42freebsd-upgrade-package-samba43freebsd-upgrade-package-samba44 | Dec 10, 2025 | Apr 12, 2016 | |
| Gentoo Linux | gentoo-linux-upgrade-net-fs-samba | Oct 30, 2017 | Apr 24, 2016 | |
| Hpux | — | hpux-update-cifs-development-cifs-prghpux-update-cifs-server-cifs-adminhpux-update-cifs-server-cifs-dochpux-update-cifs-server-cifs-libhpux-update-cifs-server-cifs-runhpux-update-cifs-server-cifs-util | Aug 11, 2017 | Apr 24, 2016 |
| Huawei Euleros 2_0_sp1 | huawei-euleros-2_0_sp1-upgrade-libldbhuawei-euleros-2_0_sp1-upgrade-libsmbclienthuawei-euleros-2_0_sp1-upgrade-libtallochuawei-euleros-2_0_sp1-upgrade-libtdbhuawei-euleros-2_0_sp1-upgrade-libteventhuawei-euleros-2_0_sp1-upgrade-libwbclienthuawei-euleros-2_0_sp1-upgrade-pytallochuawei-euleros-2_0_sp1-upgrade-python-tdbhuawei-euleros-2_0_sp1-upgrade-python-teventhuawei-euleros-2_0_sp1-upgrade-sambahuawei-euleros-2_0_sp1-upgrade-samba-clienthuawei-euleros-2_0_sp1-upgrade-samba-client-libshuawei-euleros-2_0_sp1-upgrade-samba-commonhuawei-euleros-2_0_sp1-upgrade-samba-common-libshuawei-euleros-2_0_sp1-upgrade-samba-common-toolshuawei-euleros-2_0_sp1-upgrade-samba-libshuawei-euleros-2_0_sp1-upgrade-samba-pythonhuawei-euleros-2_0_sp1-upgrade-samba-winbindhuawei-euleros-2_0_sp1-upgrade-samba-winbind-clientshuawei-euleros-2_0_sp1-upgrade-samba-winbind-moduleshuawei-euleros-2_0_sp1-upgrade-tdb-tools | Nov 30, 2017 | Apr 24, 2016 | |
| Oracle Solaris | oracle-solaris-11-3-upgrade-library-samba-libsmbclient-4-4-5-0-175-3-14-0-1-0oracle-solaris-11-3-upgrade-service-network-samba-4-4-5-0-175-3-14-0-1-0 | May 29, 2017 | Apr 24, 2016 | |
| Oracle_linux | — | oracle-linux-upgrade-ctdboracle-linux-upgrade-ctdb-develoracle-linux-upgrade-ctdb-testsoracle-linux-upgrade-ipa-admintoolsoracle-linux-upgrade-ipa-clientoracle-linux-upgrade-ipa-pythonoracle-linux-upgrade-ipa-serveroracle-linux-upgrade-ipa-server-dnsoracle-linux-upgrade-ipa-server-selinuxoracle-linux-upgrade-ipa-server-trust-adoracle-linux-upgrade-ldb-toolsoracle-linux-upgrade-libldboracle-linux-upgrade-libldb-develoracle-linux-upgrade-libsmbclientoracle-linux-upgrade-libsmbclient-develoracle-linux-upgrade-libtallocoracle-linux-upgrade-libtalloc-develoracle-linux-upgrade-libtdboracle-linux-upgrade-libtdb-develoracle-linux-upgrade-libteventoracle-linux-upgrade-libtevent-develoracle-linux-upgrade-libwbclientoracle-linux-upgrade-libwbclient-develoracle-linux-upgrade-openchangeoracle-linux-upgrade-openchange-clientoracle-linux-upgrade-openchange-develoracle-linux-upgrade-openchange-devel-docsoracle-linux-upgrade-pyldboracle-linux-upgrade-pyldb-develoracle-linux-upgrade-pytallocoracle-linux-upgrade-pytalloc-develoracle-linux-upgrade-python-tdboracle-linux-upgrade-python-teventoracle-linux-upgrade-sambaoracle-linux-upgrade-samba3xoracle-linux-upgrade-samba3x-clientoracle-linux-upgrade-samba3x-commonoracle-linux-upgrade-samba3x-docoracle-linux-upgrade-samba3x-domainjoin-guioracle-linux-upgrade-samba3x-swatoracle-linux-upgrade-samba3x-winbindoracle-linux-upgrade-samba3x-winbind-develoracle-linux-upgrade-samba4oracle-linux-upgrade-samba4-clientoracle-linux-upgrade-samba4-commonoracle-linux-upgrade-samba4-dcoracle-linux-upgrade-samba4-dc-libsoracle-linux-upgrade-samba4-develoracle-linux-upgrade-samba4-libsoracle-linux-upgrade-samba4-pidloracle-linux-upgrade-samba4-pythonoracle-linux-upgrade-samba4-testoracle-linux-upgrade-samba4-winbindoracle-linux-upgrade-samba4-winbind-clientsoracle-linux-upgrade-samba4-winbind-krb5-locatororacle-linux-upgrade-samba-clientoracle-linux-upgrade-samba-client-libsoracle-linux-upgrade-samba-commonoracle-linux-upgrade-samba-common-libsoracle-linux-upgrade-samba-common-toolsoracle-linux-upgrade-samba-dcoracle-linux-upgrade-samba-dc-libsoracle-linux-upgrade-samba-develoracle-linux-upgrade-samba-libsoracle-linux-upgrade-samba-pidloracle-linux-upgrade-samba-pythonoracle-linux-upgrade-samba-swatoracle-linux-upgrade-samba-testoracle-linux-upgrade-samba-test-develoracle-linux-upgrade-samba-test-libsoracle-linux-upgrade-samba-vfs-glusterfsoracle-linux-upgrade-samba-winbindoracle-linux-upgrade-samba-winbind-clientsoracle-linux-upgrade-samba-winbind-krb5-locatororacle-linux-upgrade-samba-winbind-modulesoracle-linux-upgrade-tdb-tools | Apr 24, 2016 | Apr 24, 2016 |
| Pulse Secure Pulse Connect Secure | pulse-secure-pulse-connect-secure-upgrade-8_1r10pulse-secure-pulse-connect-secure-upgrade-8_2r5 | Oct 28, 2020 | Apr 25, 2016 | |
| Samba | samba-upgrade-4_2_11samba-upgrade-4_3_8samba-upgrade-4_4_2 | Apr 12, 2016 | Apr 12, 2016 | |
| Suse | — | suse-upgrade-ctdbsuse-upgrade-ctdb-develsuse-upgrade-ldapsmbsuse-upgrade-libdcerpc-atsvc-develsuse-upgrade-libdcerpc-atsvc0suse-upgrade-libdcerpc-binding0suse-upgrade-libdcerpc-binding0-32bitsuse-upgrade-libdcerpc-develsuse-upgrade-libdcerpc-samr-develsuse-upgrade-libdcerpc-samr0suse-upgrade-libdcerpc0suse-upgrade-libdcerpc0-32bitsuse-upgrade-libgensec-develsuse-upgrade-libgensec0suse-upgrade-libgensec0-32bitsuse-upgrade-libldb-develsuse-upgrade-libldb1suse-upgrade-libndr-develsuse-upgrade-libndr-krb5pac-develsuse-upgrade-libndr-krb5pac0suse-upgrade-libndr-krb5pac0-32bitsuse-upgrade-libndr-nbt-develsuse-upgrade-libndr-nbt0suse-upgrade-libndr-nbt0-32bitsuse-upgrade-libndr-standard-develsuse-upgrade-libndr-standard0suse-upgrade-libndr-standard0-32bitsuse-upgrade-libndr0suse-upgrade-libndr0-32bitsuse-upgrade-libndr1suse-upgrade-libndr1-32bitsuse-upgrade-libnetapi-develsuse-upgrade-libnetapi0suse-upgrade-libnetapi0-32bitsuse-upgrade-libregistry-develsuse-upgrade-libregistry0suse-upgrade-libsamba-credentials-develsuse-upgrade-libsamba-credentials0suse-upgrade-libsamba-credentials0-32bitsuse-upgrade-libsamba-errors-develsuse-upgrade-libsamba-errors0suse-upgrade-libsamba-errors0-32bitsuse-upgrade-libsamba-hostconfig-develsuse-upgrade-libsamba-hostconfig0suse-upgrade-libsamba-hostconfig0-32bitsuse-upgrade-libsamba-passdb-develsuse-upgrade-libsamba-passdb0suse-upgrade-libsamba-passdb0-32bitsuse-upgrade-libsamba-policy-develsuse-upgrade-libsamba-policy-python3-develsuse-upgrade-libsamba-policy0suse-upgrade-libsamba-policy0-python3suse-upgrade-libsamba-util-develsuse-upgrade-libsamba-util0suse-upgrade-libsamba-util0-32bitsuse-upgrade-libsamdb-develsuse-upgrade-libsamdb0suse-upgrade-libsamdb0-32bitsuse-upgrade-libsmbclient-develsuse-upgrade-libsmbclient-raw-develsuse-upgrade-libsmbclient-raw0suse-upgrade-libsmbclient-raw0-32bitsuse-upgrade-libsmbclient0suse-upgrade-libsmbclient0-32bitsuse-upgrade-libsmbclient0-x86suse-upgrade-libsmbconf-develsuse-upgrade-libsmbconf0suse-upgrade-libsmbconf0-32bitsuse-upgrade-libsmbldap-develsuse-upgrade-libsmbldap0suse-upgrade-libsmbldap0-32bitsuse-upgrade-libsmbldap2suse-upgrade-libsmbldap2-32bitsuse-upgrade-libsmbsharemodes-develsuse-upgrade-libsmbsharemodes0suse-upgrade-libtalloc-develsuse-upgrade-libtalloc2suse-upgrade-libtalloc2-32bitsuse-upgrade-libtalloc2-x86suse-upgrade-libtdb-develsuse-upgrade-libtdb1suse-upgrade-libtdb1-32bitsuse-upgrade-libtdb1-x86suse-upgrade-libtevent-develsuse-upgrade-libtevent-util-develsuse-upgrade-libtevent-util0suse-upgrade-libtevent-util0-32bitsuse-upgrade-libtevent0suse-upgrade-libtevent0-32bitsuse-upgrade-libtevent0-x86suse-upgrade-libwbclient-develsuse-upgrade-libwbclient0suse-upgrade-libwbclient0-32bitsuse-upgrade-libwbclient0-x86suse-upgrade-sambasuse-upgrade-samba-32bitsuse-upgrade-samba-cephsuse-upgrade-samba-clientsuse-upgrade-samba-client-32bitsuse-upgrade-samba-client-x86suse-upgrade-samba-core-develsuse-upgrade-samba-develsuse-upgrade-samba-docsuse-upgrade-samba-dsdb-modulessuse-upgrade-samba-kdcsuse-upgrade-samba-krb-printingsuse-upgrade-samba-libssuse-upgrade-samba-libs-32bitsuse-upgrade-samba-libs-python3suse-upgrade-samba-libs-python3-32bitsuse-upgrade-samba-pythonsuse-upgrade-samba-python3suse-upgrade-samba-testsuse-upgrade-samba-test-develsuse-upgrade-samba-winbindsuse-upgrade-samba-winbind-32bitsuse-upgrade-samba-winbind-x86suse-upgrade-samba-x86 | Apr 13, 2016 | Apr 13, 2016 |
| Ubuntu | ubuntu-upgrade-samba | Apr 24, 2016 | Apr 24, 2016 |
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