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CVE-2016-2119

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201805-07
Posted May 23, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201805-7 - Multiple vulnerabilities have been found in Samba, the worst of which may allow remote execution of arbitrary code. Versions less than 4.5.16 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2016-2119, CVE-2017-14746, CVE-2017-15275, CVE-2017-7494, CVE-2018-1050, CVE-2018-1057
SHA-256 | 75d9dc5f4726c1960e8dac452254838989ffb7cf7b89fa278040830e69875411
Ubuntu Security Notice USN-3092-1
Posted Sep 29, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3092-1 - 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. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2016-2119
SHA-256 | 4edf165016c2460e921c064dc440ed429814ccfc70919740ee86f63fba19fc88
Red Hat Security Advisory 2016-1487-01
Posted Jul 26, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1487-01 - Samba is an open-source implementation of the Server Message Block or Common Internet File System protocol, which allows PC-compatible machines to share files, printers, and other information. Security Fix: 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.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2016-2119
SHA-256 | 5e149d7d0af0e12329b4e2d54c27f621fef270d560e4bea0d0871820b9af36c1
Red Hat Security Advisory 2016-1486-01
Posted Jul 26, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1486-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix: 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.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2016-2119
SHA-256 | e4d411131b152ada7bd72521ea7818502f22e7501a4ad8fa7818025ec57a02bd
Red Hat Security Advisory 2016-1494-01
Posted Jul 26, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1494-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix: 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.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2016-2119
SHA-256 | ae73f277b2b57b9d044f50b51c1a5f666f6be797d89161738790ac2e2a367b22
Slackware Security Advisory - samba Updates
Posted Jul 7, 2016
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New samba packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2016-2119
SHA-256 | a4a3a70ca1a42d644725180603d6190f620e2f0a99df1f407422a09ba95ae5b8
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