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CVE-2017-12151

Status Candidate

Overview

A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.

Related Files

Red Hat Security Advisory 2017-2858-01
Posted Oct 4, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2858-01 - 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: It was found that samba did not enforce "SMB signing" when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2017-12150, CVE-2017-12151, CVE-2017-12163
SHA-256 | e1751858f2654a30e58a89f135fc7f0a4a103cd6fbfb2d44571d6962a18d585f
Debian Security Advisory 3983-1
Posted Sep 22, 2017
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3983-1 - Multiple security issues have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix.

tags | advisory
systems | linux, unix, debian
advisories | CVE-2017-12150, CVE-2017-12151, CVE-2017-12163
SHA-256 | d20e3978bfa76603621405671436ff72e2de88512d266516e792372b832b4216
Red Hat Security Advisory 2017-2790-01
Posted Sep 21, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2790-01 - 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: It was found that samba did not enforce "SMB signing" when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2017-12150, CVE-2017-12151, CVE-2017-12163
SHA-256 | 6fdc918f44a544b6b95ca2d43f660a74ab6f5bafc9df5d9b96e58d4d2091ea74
Ubuntu Security Notice USN-3426-1
Posted Sep 21, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3426-1 - Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in certain situations. A remote attacker could use this issue to perform a man in the middle attack. Stefan Metzmacher discovered that Samba incorrectly handled encryption across DFS redirects. A remote attacker could use this issue to perform a man in the middle attack. Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when SMB1 is being used. A remote attacker could possibly use this issue to obtain server memory contents. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-12150, CVE-2017-12151, CVE-2017-12163
SHA-256 | fa491e751279b5ea9e1da0bb1115ba5f62388c95fddad08cf232e729f712f242
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