libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | alpine-linux-upgrade-sambaalpine-linux-upgrade-tevent | Aug 30, 2017 | Jul 7, 2016 |
| Amazon_linux | — | amazon-linux-upgrade-samba | Aug 22, 2016 | Jul 7, 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-libscentos-upgrade-samba-pidlcentos-upgrade-samba-pythoncentos-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-krb5-locatorcentos-upgrade-samba-winbind-modulescentos-upgrade-samba4centos-upgrade-samba4-clientcentos-upgrade-samba4-commoncentos-upgrade-samba4-dccentos-upgrade-samba4-dc-libscentos-upgrade-samba4-develcentos-upgrade-samba4-libscentos-upgrade-samba4-pidlcentos-upgrade-samba4-pythoncentos-upgrade-samba4-testcentos-upgrade-samba4-winbindcentos-upgrade-samba4-winbind-clientscentos-upgrade-samba4-winbind-krb5-locator | Jul 27, 2016 | Jul 7, 2016 |
| Debian | debian-upgrade-samba | Dec 20, 2016 | Jul 7, 2016 | |
| Freebsd | freebsd-upgrade-package-samba4freebsd-upgrade-package-samba41freebsd-upgrade-package-samba42freebsd-upgrade-package-samba43freebsd-upgrade-package-samba44 | Dec 10, 2025 | Jul 13, 2016 | |
| Gentoo Linux | gentoo-linux-upgrade-net-fs-samba | May 23, 2018 | Jul 7, 2016 | |
| Huawei Euleros 2_0_sp1 | huawei-euleros-2_0_sp1-upgrade-libsmbclienthuawei-euleros-2_0_sp1-upgrade-libwbclienthuawei-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-modules | Nov 30, 2017 | Jul 7, 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 | Jul 7, 2016 | |
| Oracle_linux | — | oracle-linux-upgrade-ctdboracle-linux-upgrade-ctdb-develoracle-linux-upgrade-ctdb-testsoracle-linux-upgrade-libsmbclientoracle-linux-upgrade-libsmbclient-develoracle-linux-upgrade-libwbclientoracle-linux-upgrade-libwbclient-develoracle-linux-upgrade-sambaoracle-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-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-modules | Jul 26, 2016 | Jul 7, 2016 |
| Redhat_linux | — | redhat-upgrade-libsmbclientredhat-upgrade-libsmbclient-develredhat-upgrade-libwbclientredhat-upgrade-libwbclient-develredhat-upgrade-sambaredhat-upgrade-samba-clientredhat-upgrade-samba-client-libsredhat-upgrade-samba-commonredhat-upgrade-samba-common-libsredhat-upgrade-samba-common-toolsredhat-upgrade-samba-dcredhat-upgrade-samba-dc-libsredhat-upgrade-samba-debuginforedhat-upgrade-samba-develredhat-upgrade-samba-libsredhat-upgrade-samba-pidlredhat-upgrade-samba-pythonredhat-upgrade-samba-testredhat-upgrade-samba-test-develredhat-upgrade-samba-test-libsredhat-upgrade-samba-vfs-glusterfsredhat-upgrade-samba-winbindredhat-upgrade-samba-winbind-clientsredhat-upgrade-samba-winbind-krb5-locatorredhat-upgrade-samba-winbind-modulesredhat-upgrade-samba4redhat-upgrade-samba4-clientredhat-upgrade-samba4-commonredhat-upgrade-samba4-dcredhat-upgrade-samba4-dc-libsredhat-upgrade-samba4-debuginforedhat-upgrade-samba4-develredhat-upgrade-samba4-libsredhat-upgrade-samba4-pidlredhat-upgrade-samba4-pythonredhat-upgrade-samba4-testredhat-upgrade-samba4-winbindredhat-upgrade-samba4-winbind-clientsredhat-upgrade-samba4-winbind-krb5-locator | Jul 29, 2016 | Jul 7, 2016 |
| Samba | samba-upgrade-4_2_14samba-upgrade-4_3_11samba-upgrade-4_4_5 | Oct 13, 2016 | Jul 7, 2016 | |
| Suse | — | suse-upgrade-ctdbsuse-upgrade-ctdb-develsuse-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-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-libsmbconf-develsuse-upgrade-libsmbconf0suse-upgrade-libsmbconf0-32bitsuse-upgrade-libsmbldap-develsuse-upgrade-libsmbldap0suse-upgrade-libsmbldap0-32bitsuse-upgrade-libsmbldap2suse-upgrade-libsmbldap2-32bitsuse-upgrade-libtevent-util-develsuse-upgrade-libtevent-util0suse-upgrade-libtevent-util0-32bitsuse-upgrade-libwbclient-develsuse-upgrade-libwbclient0suse-upgrade-libwbclient0-32bitsuse-upgrade-sambasuse-upgrade-samba-32bitsuse-upgrade-samba-cephsuse-upgrade-samba-clientsuse-upgrade-samba-client-32bitsuse-upgrade-samba-core-develsuse-upgrade-samba-docsuse-upgrade-samba-dsdb-modulessuse-upgrade-samba-kdcsuse-upgrade-samba-libssuse-upgrade-samba-libs-32bitsuse-upgrade-samba-libs-python3suse-upgrade-samba-libs-python3-32bitsuse-upgrade-samba-pythonsuse-upgrade-samba-python3suse-upgrade-samba-test-develsuse-upgrade-samba-winbindsuse-upgrade-samba-winbind-32bit | Jul 26, 2016 | Jul 7, 2016 |
| Ubuntu | ubuntu-upgrade-samba | Sep 28, 2016 | Jul 7, 2016 |
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