From patchwork Mon Apr 17 06:07:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Brown X-Patchwork-Id: 9683601 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id ABBA6600C5 for ; Mon, 17 Apr 2017 06:08:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9D92227317 for ; Mon, 17 Apr 2017 06:08:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 921B127B2F; Mon, 17 Apr 2017 06:08:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.wl.linuxfoundation.org (Postfix) with SMTP id 9DD6A27317 for ; Mon, 17 Apr 2017 06:08:06 +0000 (UTC) Received: (qmail 3438 invoked by uid 550); 17 Apr 2017 06:08:00 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 1850 invoked from network); 17 Apr 2017 06:07:54 -0000 X-Virus-Scanned: Debian amavisd-new at mfilter16-d.gandi.net X-Originating-IP: 72.66.113.207 From: Matt Brown To: jmorris@namei.org, gregkh@linuxfoundation.org, akpm@linux-foundation.org Cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-hardening@lists.openwall.com, Matt Brown Date: Mon, 17 Apr 2017 02:07:03 -0400 Message-Id: <20170417060706.28674-2-matt@nmatt.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20170417060706.28674-1-matt@nmatt.com> References: <20170417060706.28674-1-matt@nmatt.com> Subject: [kernel-hardening] [PATCH 1/4] added SECURITY_TIOCSTI_RESTRICT kernel config X-Virus-Scanned: ClamAV using ClamSMTP adding the kernel config SECURITY_TIOCSTI_RESTRICT in order to allow the user to restrict unprivileged command injection using TIOCSTI tty ioctls Signed-off-by: Matt Brown --- security/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/security/Kconfig b/security/Kconfig index 3ff1bf9..d757bcb 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -18,6 +18,18 @@ config SECURITY_DMESG_RESTRICT If you are unsure how to answer this question, answer N. +config SECURITY_TIOCSTI_RESTRICT + bool "Restrict unprivileged use of tiocsti command injection" + default n + help + This enforces restrictions on unprivileged users injecting commands + into other processes in the same tty session using the TIOCSTI ioctl + + If this option is not selected, no restrictions will be enforced + unless the tiocsti_restrict sysctl is explicitly set to (1). + + If you are unsure how to answer this question, answer N. + config SECURITY bool "Enable different security models" depends on SYSFS