ID CVE-2016-2119
Summary 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.
References
Vulnerable Configurations
  • Samba 4.4.4
    cpe:2.3:a:samba:samba:4.4.4
  • Samba 4.4.3
    cpe:2.3:a:samba:samba:4.4.3
  • Samba 4.4.2
    cpe:2.3:a:samba:samba:4.4.2
  • cpe:2.3:a:samba:samba:4.4.0
    cpe:2.3:a:samba:samba:4.4.0
  • Samba 4.3.11
    cpe:2.3:a:samba:samba:4.3.11
  • Samba 4.3.10
    cpe:2.3:a:samba:samba:4.3.10
  • Samba 4.3.9
    cpe:2.3:a:samba:samba:4.3.9
  • Samba 4.3.6
    cpe:2.3:a:samba:samba:4.3.6
  • Samba 4.2.14
    cpe:2.3:a:samba:samba:4.2.14
  • Samba 4.2.13
    cpe:2.3:a:samba:samba:4.2.13
  • Samba 4.2.12
    cpe:2.3:a:samba:samba:4.2.12
  • Samba 4.2.10
    cpe:2.3:a:samba:samba:4.2.10
  • Samba 4.4.0 Release Candidate 3
    cpe:2.3:a:samba:samba:4.4.0:rc3
  • Samba 4.4.0 Release Candidate 2
    cpe:2.3:a:samba:samba:4.4.0:rc2
  • Samba 4.4.0 Release Candidate 1
    cpe:2.3:a:samba:samba:4.4.0:rc1
  • Samba 4.3.8
    cpe:2.3:a:samba:samba:4.3.8
  • Samba 4.3.5
    cpe:2.3:a:samba:samba:4.3.5
  • Samba 4.3.4
    cpe:2.3:a:samba:samba:4.3.4
  • Samba 4.3.3
    cpe:2.3:a:samba:samba:4.3.3
  • Samba 4.3.2
    cpe:2.3:a:samba:samba:4.3.2
  • Samba 4.3.1
    cpe:2.3:a:samba:samba:4.3.1
  • Samba 4.3.0
    cpe:2.3:a:samba:samba:4.3.0
  • Samba 4.2.8
    cpe:2.3:a:samba:samba:4.2.8
  • Samba 4.2.7
    cpe:2.3:a:samba:samba:4.2.7
  • Samba 4.2.6
    cpe:2.3:a:samba:samba:4.2.6
  • Samba 4.2.5
    cpe:2.3:a:samba:samba:4.2.5
  • Samba 4.2.4
    cpe:2.3:a:samba:samba:4.2.4
  • Samba 4.2.3
    cpe:2.3:a:samba:samba:4.2.3
  • Samba 4.2.2
    cpe:2.3:a:samba:samba:4.2.2
  • Samba 4.2.11
    cpe:2.3:a:samba:samba:4.2.11
  • Samba 4.2.1
    cpe:2.3:a:samba:samba:4.2.1
  • Samba 4.2.0 release candidate 4
    cpe:2.3:a:samba:samba:4.2.0:rc4
  • Samba 4.2.0 release candidate 3
    cpe:2.3:a:samba:samba:4.2.0:rc3
  • Samba 4.2.0 release candidate 2
    cpe:2.3:a:samba:samba:4.2.0:rc2
  • Samba 4.2.0 release candidate 1
    cpe:2.3:a:samba:samba:4.2.0:rc1
  • Samba 4.1.9
    cpe:2.3:a:samba:samba:4.1.9
  • Samba 4.1.8
    cpe:2.3:a:samba:samba:4.1.8
  • Samba 4.1.7
    cpe:2.3:a:samba:samba:4.1.7
  • Samba 4.1.6
    cpe:2.3:a:samba:samba:4.1.6
  • Samba 4.1.5
    cpe:2.3:a:samba:samba:4.1.5
  • Samba 4.1.4
    cpe:2.3:a:samba:samba:4.1.4
  • Samba 4.1.3
    cpe:2.3:a:samba:samba:4.1.3
  • Samba 4.1.23
    cpe:2.3:a:samba:samba:4.1.23
  • Samba 4.1.22
    cpe:2.3:a:samba:samba:4.1.22
  • Samba 4.1.21
    cpe:2.3:a:samba:samba:4.1.21
  • Samba 4.1.20
    cpe:2.3:a:samba:samba:4.1.20
  • Samba 4.1.2
    cpe:2.3:a:samba:samba:4.1.2
  • Samba 4.1.19
    cpe:2.3:a:samba:samba:4.1.19
  • Samba 4.1.18
    cpe:2.3:a:samba:samba:4.1.18
  • Samba 4.1.17
    cpe:2.3:a:samba:samba:4.1.17
  • Samba 4.1.16
    cpe:2.3:a:samba:samba:4.1.16
  • Samba 4.1.15
    cpe:2.3:a:samba:samba:4.1.15
  • Samba 4.1.14
    cpe:2.3:a:samba:samba:4.1.14
  • Samba 4.1.13
    cpe:2.3:a:samba:samba:4.1.13
  • Samba 4.1.12
    cpe:2.3:a:samba:samba:4.1.12
  • Samba 4.1.11
    cpe:2.3:a:samba:samba:4.1.11
  • Samba 4.1.10
    cpe:2.3:a:samba:samba:4.1.10
  • Samba 4.1.1
    cpe:2.3:a:samba:samba:4.1.1
  • Samba 4.1.0
    cpe:2.3:a:samba:samba:4.1.0
  • Samba 4.0.9
    cpe:2.3:a:samba:samba:4.0.9
  • Samba 4.0.8
    cpe:2.3:a:samba:samba:4.0.8
  • Samba 4.0.7
    cpe:2.3:a:samba:samba:4.0.7
  • Samba 4.0.6
    cpe:2.3:a:samba:samba:4.0.6
  • Samba 4.0.5
    cpe:2.3:a:samba:samba:4.0.5
  • Samba 4.0.4
    cpe:2.3:a:samba:samba:4.0.4
  • Samba 4.0.3
    cpe:2.3:a:samba:samba:4.0.3
  • Samba 4.0.26
    cpe:2.3:a:samba:samba:4.0.26
  • Samba 4.0.25
    cpe:2.3:a:samba:samba:4.0.25
  • Samba 4.0.24
    cpe:2.3:a:samba:samba:4.0.24
  • Samba 4.0.23
    cpe:2.3:a:samba:samba:4.0.23
  • Samba 4.0.22
    cpe:2.3:a:samba:samba:4.0.22
  • Samba 4.0.21
    cpe:2.3:a:samba:samba:4.0.21
  • Samba 4.0.20
    cpe:2.3:a:samba:samba:4.0.20
  • Samba 4.0.2
    cpe:2.3:a:samba:samba:4.0.2
  • Samba 4.0.19
    cpe:2.3:a:samba:samba:4.0.19
  • Samba 4.0.18
    cpe:2.3:a:samba:samba:4.0.18
  • Samba 4.0.17
    cpe:2.3:a:samba:samba:4.0.17
  • Samba 4.0.16
    cpe:2.3:a:samba:samba:4.0.16
  • Samba 4.0.15
    cpe:2.3:a:samba:samba:4.0.15
  • Samba 4.0.14
    cpe:2.3:a:samba:samba:4.0.14
  • Samba 4.0.13
    cpe:2.3:a:samba:samba:4.0.13
  • Samba 4.0.12
    cpe:2.3:a:samba:samba:4.0.12
  • Samba 4.0.11
    cpe:2.3:a:samba:samba:4.0.11
  • Samba 4.0.10
    cpe:2.3:a:samba:samba:4.0.10
  • Samba 4.0.1
    cpe:2.3:a:samba:samba:4.0.1
  • Samba 4.0.0
    cpe:2.3:a:samba:samba:4.0.0
CVSS
Base: 6.8 (as of 07-07-2016 - 14:13)
Impact:
Exploitability:
CWE CWE-284
CAPEC
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2570-1.NASL
    description This update for samba provides the following fix: Following security issue was fixed : - CVE-2016-2119: Prevent client-side SMB2 signing downgrade. (bsc#986869) Also the following bugs were fixed : - Fix possible ctdb crash when opening sockets with htons(IPPROTO_RAW). (bsc#969522) - Honor smb.conf socket options in winbind. (bsc#975131) - Fix ntlm-auth segmentation fault with squid. (bsc#986228) - Implement new '--no-dns-updates' option in 'net ads' command. (bsc#991564) - Fix population of ctdb sysconfig after source merge. (bsc#981566) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2017-10-29
    modified 2016-12-28
    plugin id 94274
    published 2016-10-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94274
    title SUSE SLES12 Security Update : samba (SUSE-SU-2016:2570-1)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20160726_SAMBA_ON_SL7_X.NASL
    description Security Fix(es) : - A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Bug Fix(es) : - Previously, the 'net' command in some cases failed to join the client to Active Directory (AD) because the permissions setting prevented modification of the supported Kerberos encryption type LDAP attribute. With this update, Samba has been fixed to allow joining an AD domain as a user. In addition, Samba now uses the machine account credentials to set up the Kerberos encryption types within AD for the joined machine. As a result, using 'net' to join a domain now works more reliably. - Previously, the idmap_hash module worked incorrectly when it was used together with other modules. As a consequence, user and group IDs were not mapped properly. A patch has been applied to skip already configured modules. Now, the hash module can be used as the default idmap configuration back end and IDs are resolved correctly.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92582
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92582
    title Scientific Linux Security Update : samba on SL7.x x86_64
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20160726_SAMBA4_ON_SL6_X.NASL
    description Security Fix(es) : - A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119)
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92581
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92581
    title Scientific Linux Security Update : samba4 on SL6.x i386/x86_64
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2016-1487.NASL
    description From Red Hat Security Advisory 2016:1487 : An update for samba4 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92577
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92577
    title Oracle Linux 6 : samba4 (ELSA-2016-1487)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-3092-1.NASL
    description Stefan Metzmacher discovered that Samba incorrectly handled certain flags in SMB2/3 client connections. A remote attacker could use this issue to disable client signing and impersonate servers by performing a man in the middle attack. Samba has been updated to 4.3.11 in Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. In addition to the security fix, the updated packages contain bug fixes, new features, and possibly incompatible changes. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 93800
    published 2016-09-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93800
    title Ubuntu 14.04 LTS / 16.04 LTS : samba vulnerability (USN-3092-1)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2016-1487.NASL
    description An update for samba4 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92567
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92567
    title CentOS 6 : samba4 (CESA-2016:1487)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-48B53757A9.NASL
    description Security fix for CVE-2016-2119 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92330
    published 2016-07-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92330
    title Fedora 23 : 2:samba (2016-48b53757a9)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2016-1486.NASL
    description An update for samba is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter. Bug Fix(es) : * Previously, the 'net' command in some cases failed to join the client to Active Directory (AD) because the permissions setting prevented modification of the supported Kerberos encryption type LDAP attribute. With this update, Samba has been fixed to allow joining an AD domain as a user. In addition, Samba now uses the machine account credentials to set up the Kerberos encryption types within AD for the joined machine. As a result, using 'net' to join a domain now works more reliably. (BZ#1351260) * Previously, the idmap_hash module worked incorrectly when it was used together with other modules. As a consequence, user and group IDs were not mapped properly. A patch has been applied to skip already configured modules. Now, the hash module can be used as the default idmap configuration back end and IDs are resolved correctly. (BZ#1350759)
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92566
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92566
    title CentOS 7 : samba (CESA-2016:1486)
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2016-189-01.NASL
    description New samba packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 91976
    published 2016-07-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91976
    title Slackware 14.0 / 14.1 / 14.2 / current : samba (SSA:2016-189-01)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2016-1486.NASL
    description From Red Hat Security Advisory 2016:1486 : An update for samba is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter. Bug Fix(es) : * Previously, the 'net' command in some cases failed to join the client to Active Directory (AD) because the permissions setting prevented modification of the supported Kerberos encryption type LDAP attribute. With this update, Samba has been fixed to allow joining an AD domain as a user. In addition, Samba now uses the machine account credentials to set up the Kerberos encryption types within AD for the joined machine. As a result, using 'net' to join a domain now works more reliably. (BZ#1351260) * Previously, the idmap_hash module worked incorrectly when it was used together with other modules. As a consequence, user and group IDs were not mapped properly. A patch has been applied to skip already configured modules. Now, the hash module can be used as the default idmap configuration back end and IDs are resolved correctly. (BZ#1350759)
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92576
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92576
    title Oracle Linux 7 : samba (ELSA-2016-1486)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-1111.NASL
    description This update for samba provides the following fixes : - CVE-2016-2119: Prevent client-side SMB2 signing downgrade. (bsc#986869) - Fix possible ctdb crash when opening sockets with htons(IPPROTO_RAW). (bsc#969522) - Honor smb.conf socket options in winbind. (bsc#975131) - Fix ntlm-auth segmentation fault with squid. (bsc#986228) - Implement new '--no-dns-updates' option in 'net ads' command. (bsc#991564) - Fix population of ctdb sysconfig after source merge. (bsc#981566) This update was imported from the SUSE:SLE-12-SP1:Update project.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 93702
    published 2016-09-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93702
    title openSUSE Security Update : samba (openSUSE-2016-1111)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2306-1.NASL
    description This update for samba provides the following fixes : - CVE-2016-2119: Prevent client-side SMB2 signing downgrade. (bsc#986869) - Fix possible ctdb crash when opening sockets with htons(IPPROTO_RAW). (bsc#969522) - Honor smb.conf socket options in winbind. (bsc#975131) - Fix ntlm-auth segmentation fault with squid. (bsc#986228) - Implement new '--no-dns-updates' option in 'net ads' command. (bsc#991564) - Fix population of ctdb sysconfig after source merge. (bsc#981566) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2017-10-29
    modified 2016-12-28
    plugin id 93508
    published 2016-09-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93508
    title SUSE SLED12 / SLES12 Security Update : samba (SUSE-SU-2016:2306-1)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_4729C849489711E6B704000C292E4FD8.NASL
    description Samba team reports : A man in the middle attack can disable client signing over SMB2/3, even if enforced by configuration parameters.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92027
    published 2016-07-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92027
    title FreeBSD : samba -- client side SMB2/3 required signing can be downgraded (4729c849-4897-11e6-b704-000c292e4fd8)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-0ACEC022F4.NASL
    description Security fix for CVE-2016-2119 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92227
    published 2016-07-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92227
    title Fedora 24 : 2:samba (2016-0acec022f4)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-881.NASL
    description This update for samba fixes the following issues : - Prevent client-side SMB2 signing downgrade; CVE-2016-2119; (bso#11860); (boo#986869). - Honor smb.conf socket options in winbind; (boo#975131). - Don't use htons() with IP_PROTO_RAW; (bso#11705); (boo#969522).
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92450
    published 2016-07-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92450
    title openSUSE Security Update : samba (openSUSE-2016-881)
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2016-732.NASL
    description A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server.
    last seen 2018-04-19
    modified 2018-04-18
    plugin id 93010
    published 2016-08-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93010
    title Amazon Linux AMI : samba (ALAS-2016-732)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-1494.NASL
    description An update for samba is now available for Red Hat Gluster Storage 3.1 for RHEL 6 and Red Hat Gluster Storage 3.1 for RHEL 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.
    last seen 2017-10-29
    modified 2017-01-10
    plugin id 92603
    published 2016-07-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92603
    title RHEL 6 / 7 : Storage Server (RHSA-2016:1494)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-1487.NASL
    description An update for samba4 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.
    last seen 2017-10-29
    modified 2017-01-10
    plugin id 92553
    published 2016-07-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92553
    title RHEL 6 : samba4 (RHSA-2016:1487)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-1486.NASL
    description An update for samba is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Samba is an open source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es) : * A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter. Bug Fix(es) : * Previously, the 'net' command in some cases failed to join the client to Active Directory (AD) because the permissions setting prevented modification of the supported Kerberos encryption type LDAP attribute. With this update, Samba has been fixed to allow joining an AD domain as a user. In addition, Samba now uses the machine account credentials to set up the Kerberos encryption types within AD for the joined machine. As a result, using 'net' to join a domain now works more reliably. (BZ#1351260) * Previously, the idmap_hash module worked incorrectly when it was used together with other modules. As a consequence, user and group IDs were not mapped properly. A patch has been applied to skip already configured modules. Now, the hash module can be used as the default idmap configuration back end and IDs are resolved correctly. (BZ#1350759)
    last seen 2017-10-29
    modified 2017-01-10
    plugin id 92579
    published 2016-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92579
    title RHEL 7 : samba (RHSA-2016:1486)
  • NASL family Misc.
    NASL id SAMBA_4_4_5.NASL
    description The version of Samba running on the remote host is 4.x prior to 4.2.14, 4.3.x prior to 4.3.11, or 4.4.x prior to 4.4.5. It is, therefore, affected by a flaw in libcli/smb/smbXcli_base.c that is triggered when handling SMB2 and SMB3 client connections. A man-in-the-middle attacker can exploit this, by injecting the SMB2_SESSION_FLAG_IS_GUEST or SMB2_SESSION_FLAG_IS_NULL flags, to downgrade the required signing for a client connection, allowing the attacker to spoof SMB2 and SMB3 servers.
    last seen 2017-10-29
    modified 2016-12-27
    plugin id 92466
    published 2016-07-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92466
    title Samba 4.x < 4.2.14 / 4.3.x < 4.3.11 / 4.4.x < 4.4.5 SMB2/3 Client Connection Required Signing Downgrade
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-3740.NASL
    description Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common Vulnerabilities and Exposures project identifies the following issues : - CVE-2016-2119 Stefan Metzmacher discovered that client-side SMB2/3 required signing can be downgraded, allowing a man-in-the-middle attacker to impersonate a server being connected to by Samba, and return malicious results. - CVE-2016-2123 Trend Micro's Zero Day Initiative and Frederic Besler discovered that the routine ndr_pull_dnsp_name, used to parse data from the Samba Active Directory ldb database, contains an integer overflow flaw, leading to an attacker-controlled memory overwrite. An authenticated user can take advantage of this flaw for remote privilege escalation. - CVE-2016-2125 Simo Sorce of Red Hat discovered that the Samba client code always requests a forwardable ticket when using Kerberos authentication. A target server, which must be in the current or trusted domain/realm, is given a valid general purpose Kerberos 'Ticket Granting Ticket' (TGT), which can be used to fully impersonate the authenticated user or service. - CVE-2016-2126 Volker Lendecke discovered several flaws in the Kerberos PAC validation. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket due to incorrect handling of the PAC checksum. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.
    last seen 2017-10-29
    modified 2017-03-31
    plugin id 95936
    published 2016-12-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=95936
    title Debian DSA-3740-1 : samba - security update
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201805-07.NASL
    description The remote host is affected by the vulnerability described in GLSA-201805-07 (Samba: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Samba. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly execute arbitrary code, cause a Denial of Service condition, conduct a man-in-the-middle attack, or obtain sensitive information. Workaround : There is no known workaround at this time.
    last seen 2018-06-08
    modified 2018-06-07
    plugin id 109974
    published 2018-05-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109974
    title GLSA-201805-07 : Samba: Multiple vulnerabilities (SambaCry)
  • NASL family Huawei Local Security Checks
    NASL id EULEROS_SA-2016-1031.NASL
    description According to the version of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server. (CVE-2016-2119) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-06-14
    modified 2018-06-13
    plugin id 99794
    published 2017-05-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=99794
    title EulerOS 2.0 SP1 : samba (EulerOS-SA-2016-1031)
redhat via4
advisories
  • bugzilla
    id 1351955
    title CVE-2016-2119 samba: Client side SMB2/3 required signing can be downgraded
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 7 Client is installed
        oval oval:com.redhat.rhsa:tst:20140675001
      • comment Red Hat Enterprise Linux 7 Server is installed
        oval oval:com.redhat.rhsa:tst:20140675002
      • comment Red Hat Enterprise Linux 7 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20140675003
      • comment Red Hat Enterprise Linux 7 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20140675004
    • OR
      • AND
        • comment ctdb is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486045
        • comment ctdb is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006014
      • AND
        • comment ctdb-devel is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486053
        • comment ctdb-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006046
      • AND
        • comment ctdb-tests is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486013
        • comment ctdb-tests is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006036
      • AND
        • comment libsmbclient is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486009
        • comment libsmbclient is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860012
      • AND
        • comment libsmbclient-devel is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486027
        • comment libsmbclient-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860022
      • AND
        • comment libwbclient is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486035
        • comment libwbclient is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867026
      • AND
        • comment libwbclient-devel is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486049
        • comment libwbclient-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867008
      • AND
        • comment samba is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486037
        • comment samba is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860006
      • AND
        • comment samba-client is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486043
        • comment samba-client is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860014
      • AND
        • comment samba-client-libs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486041
        • comment samba-client-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006044
      • AND
        • comment samba-common is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486057
        • comment samba-common is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860016
      • AND
        • comment samba-common-libs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486015
        • comment samba-common-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006012
      • AND
        • comment samba-common-tools is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486031
        • comment samba-common-tools is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006016
      • AND
        • comment samba-dc is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486025
        • comment samba-dc is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867028
      • AND
        • comment samba-dc-libs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486007
        • comment samba-dc-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867014
      • AND
        • comment samba-devel is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486029
        • comment samba-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867020
      • AND
        • comment samba-libs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486047
        • comment samba-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867024
      • AND
        • comment samba-pidl is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486055
        • comment samba-pidl is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867022
      • AND
        • comment samba-python is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486021
        • comment samba-python is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867010
      • AND
        • comment samba-test is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486017
        • comment samba-test is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867040
      • AND
        • comment samba-test-devel is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486011
        • comment samba-test-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867030
      • AND
        • comment samba-test-libs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486033
        • comment samba-test-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20160006028
      • AND
        • comment samba-vfs-glusterfs is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486005
        • comment samba-vfs-glusterfs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867044
      • AND
        • comment samba-winbind is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486019
        • comment samba-winbind is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860010
      • AND
        • comment samba-winbind-clients is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486039
        • comment samba-winbind-clients is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20100860020
      • AND
        • comment samba-winbind-krb5-locator is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486023
        • comment samba-winbind-krb5-locator is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20111221018
      • AND
        • comment samba-winbind-modules is earlier than 0:4.2.10-7.el7_2
          oval oval:com.redhat.rhsa:tst:20161486051
        • comment samba-winbind-modules is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20140867016
    rhsa
    id RHSA-2016:1486
    released 2016-07-26
    severity Moderate
    title RHSA-2016:1486: samba security and bug fix update (Moderate)
  • bugzilla
    id 1351955
    title CVE-2016-2119 samba: Client side SMB2/3 required signing can be downgraded
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 6 Client is installed
        oval oval:com.redhat.rhsa:tst:20100842001
      • comment Red Hat Enterprise Linux 6 Server is installed
        oval oval:com.redhat.rhsa:tst:20100842002
      • comment Red Hat Enterprise Linux 6 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20100842003
      • comment Red Hat Enterprise Linux 6 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20100842004
    • OR
      • AND
        • comment samba4 is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487017
        • comment samba4 is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506006
      • AND
        • comment samba4-client is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487027
        • comment samba4-client is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506014
      • AND
        • comment samba4-common is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487021
        • comment samba4-common is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506022
      • AND
        • comment samba4-dc is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487007
        • comment samba4-dc is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506020
      • AND
        • comment samba4-dc-libs is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487015
        • comment samba4-dc-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506028
      • AND
        • comment samba4-devel is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487005
        • comment samba4-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506026
      • AND
        • comment samba4-libs is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487013
        • comment samba4-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506010
      • AND
        • comment samba4-pidl is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487025
        • comment samba4-pidl is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506032
      • AND
        • comment samba4-python is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487023
        • comment samba4-python is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506030
      • AND
        • comment samba4-test is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487019
        • comment samba4-test is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506008
      • AND
        • comment samba4-winbind is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487029
        • comment samba4-winbind is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506024
      • AND
        • comment samba4-winbind-clients is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487011
        • comment samba4-winbind-clients is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506012
      • AND
        • comment samba4-winbind-krb5-locator is earlier than 0:4.2.10-7.el6_8
          oval oval:com.redhat.rhsa:tst:20161487009
        • comment samba4-winbind-krb5-locator is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20130506018
    rhsa
    id RHSA-2016:1487
    released 2016-07-26
    severity Moderate
    title RHSA-2016:1487: samba4 security update (Moderate)
  • rhsa
    id RHSA-2016:1494
rpms
  • ctdb-0:4.2.10-7.el7_2
  • ctdb-devel-0:4.2.10-7.el7_2
  • ctdb-tests-0:4.2.10-7.el7_2
  • libsmbclient-0:4.2.10-7.el7_2
  • libsmbclient-devel-0:4.2.10-7.el7_2
  • libwbclient-0:4.2.10-7.el7_2
  • libwbclient-devel-0:4.2.10-7.el7_2
  • samba-0:4.2.10-7.el7_2
  • samba-client-0:4.2.10-7.el7_2
  • samba-client-libs-0:4.2.10-7.el7_2
  • samba-common-0:4.2.10-7.el7_2
  • samba-common-libs-0:4.2.10-7.el7_2
  • samba-common-tools-0:4.2.10-7.el7_2
  • samba-dc-0:4.2.10-7.el7_2
  • samba-dc-libs-0:4.2.10-7.el7_2
  • samba-devel-0:4.2.10-7.el7_2
  • samba-libs-0:4.2.10-7.el7_2
  • samba-pidl-0:4.2.10-7.el7_2
  • samba-python-0:4.2.10-7.el7_2
  • samba-test-0:4.2.10-7.el7_2
  • samba-test-devel-0:4.2.10-7.el7_2
  • samba-test-libs-0:4.2.10-7.el7_2
  • samba-vfs-glusterfs-0:4.2.10-7.el7_2
  • samba-winbind-0:4.2.10-7.el7_2
  • samba-winbind-clients-0:4.2.10-7.el7_2
  • samba-winbind-krb5-locator-0:4.2.10-7.el7_2
  • samba-winbind-modules-0:4.2.10-7.el7_2
  • samba4-0:4.2.10-7.el6_8
  • samba4-client-0:4.2.10-7.el6_8
  • samba4-common-0:4.2.10-7.el6_8
  • samba4-dc-0:4.2.10-7.el6_8
  • samba4-dc-libs-0:4.2.10-7.el6_8
  • samba4-devel-0:4.2.10-7.el6_8
  • samba4-libs-0:4.2.10-7.el6_8
  • samba4-pidl-0:4.2.10-7.el6_8
  • samba4-python-0:4.2.10-7.el6_8
  • samba4-test-0:4.2.10-7.el6_8
  • samba4-winbind-0:4.2.10-7.el6_8
  • samba4-winbind-clients-0:4.2.10-7.el6_8
  • samba4-winbind-krb5-locator-0:4.2.10-7.el6_8
refmap via4
bid 91700
confirm
sectrack 1036244
suse openSUSE-SU-2016:1830
Last major update 28-11-2016 - 15:03
Published 07-07-2016 - 11:59
Last modified 31-08-2017 - 21:29
Back to Top