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[69.42.5.101]) by smtp.gmail.com with ESMTPSA id v18sm15512887pgb.23.2018.03.30.15.18.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Mar 2018 15:18:08 -0700 (PDT) From: Rosen Penev To: lede-dev@lists.infradead.org Date: Fri, 30 Mar 2018 15:18:02 -0700 Message-Id: <20180330221804.29241-1-rosenp@gmail.com> X-Mailer: git-send-email 2.16.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180330_151820_061039_AE8A2C91 X-CRM114-Status: GOOD ( 10.72 ) X-Spam-Score: -0.1 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:400e:c00:0:0:0:241 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rosenp[at]gmail.com) -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid Subject: [LEDE-DEV] [PATCH 1/3] kernel: Restrict dmesg output to root. X-BeenThere: lede-dev@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rosen Penev MIME-Version: 1.0 Sender: "Lede-dev" Errors-To: lede-dev-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org In typical OpenWrt setups, there are no other users that have a shell spawned for them by default. This can be overriden by the kernel.dmesg_output syssctl. Signed-off-by: Rosen Penev --- target/linux/generic/config-3.18 | 2 +- target/linux/generic/config-4.14 | 2 +- target/linux/generic/config-4.4 | 2 +- target/linux/generic/config-4.9 | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/target/linux/generic/config-3.18 b/target/linux/generic/config-3.18 index 04245531f6..0f66960fdc 100644 --- a/target/linux/generic/config-3.18 +++ b/target/linux/generic/config-3.18 @@ -3284,7 +3284,7 @@ CONFIG_SCSI_PROC_FS=y # CONFIG_SECCOMP is not set # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set -# CONFIG_SECURITY_DMESG_RESTRICT is not set +CONFIG_SECURITY_DMESG_RESTRICT=y # CONFIG_SEEQ8005 is not set CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_SENSORS_ABITUGURU is not set diff --git a/target/linux/generic/config-4.14 b/target/linux/generic/config-4.14 index a27198335d..8a1e494429 100644 --- a/target/linux/generic/config-4.14 +++ b/target/linux/generic/config-4.14 @@ -3999,7 +3999,7 @@ CONFIG_SCSI_PROC_FS=y CONFIG_SECTION_MISMATCH_WARN_ONLY=y # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set -# CONFIG_SECURITY_DMESG_RESTRICT is not set +CONFIG_SECURITY_DMESG_RESTRICT=y CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_SENSORS_ABITUGURU is not set # CONFIG_SENSORS_ABITUGURU3 is not set diff --git a/target/linux/generic/config-4.4 b/target/linux/generic/config-4.4 index 3285000eb4..d29f27d747 100644 --- a/target/linux/generic/config-4.4 +++ b/target/linux/generic/config-4.4 @@ -3423,7 +3423,7 @@ CONFIG_SCSI_PROC_FS=y CONFIG_SECTION_MISMATCH_WARN_ONLY=y # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set -# CONFIG_SECURITY_DMESG_RESTRICT is not set +CONFIG_SECURITY_DMESG_RESTRICT=y CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_SENSORS_ABITUGURU is not set # CONFIG_SENSORS_ABITUGURU3 is not set diff --git a/target/linux/generic/config-4.9 b/target/linux/generic/config-4.9 index 3f050c205c..1cc607d4dd 100644 --- a/target/linux/generic/config-4.9 +++ b/target/linux/generic/config-4.9 @@ -3766,7 +3766,7 @@ CONFIG_SCSI_PROC_FS=y CONFIG_SECTION_MISMATCH_WARN_ONLY=y # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set -# CONFIG_SECURITY_DMESG_RESTRICT is not set +CONFIG_SECURITY_DMESG_RESTRICT=y CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_SENSORS_ABITUGURU is not set # CONFIG_SENSORS_ABITUGURU3 is not set From patchwork Fri Mar 30 22:18:03 2018 Content-Type: text/plain; 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[69.42.5.101]) by smtp.gmail.com with ESMTPSA id v18sm15512887pgb.23.2018.03.30.15.18.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Mar 2018 15:18:09 -0700 (PDT) From: Rosen Penev To: lede-dev@lists.infradead.org Date: Fri, 30 Mar 2018 15:18:03 -0700 Message-Id: <20180330221804.29241-2-rosenp@gmail.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180330221804.29241-1-rosenp@gmail.com> References: <20180330221804.29241-1-rosenp@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180330_151820_791735_80DDB24E X-CRM114-Status: GOOD ( 10.11 ) X-Spam-Score: -0.1 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:400e:c05:0:0:0:242 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rosenp[at]gmail.com) -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid Subject: [LEDE-DEV] [PATCH 2/3] sysctl: Restrict kernel pointer access from normal users. X-BeenThere: lede-dev@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rosen Penev MIME-Version: 1.0 Sender: "Lede-dev" Errors-To: lede-dev-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org The only downside to this is that it breaks perf with non-root users. I don't think this is an issue in OpenWrt. Signed-off-by: Rosen Penev --- package/base-files/files/etc/sysctl.conf | 3 +++ 1 file changed, 3 insertions(+) diff --git a/package/base-files/files/etc/sysctl.conf b/package/base-files/files/etc/sysctl.conf index ddc7a9bf69..61a43057a1 100644 --- a/package/base-files/files/etc/sysctl.conf +++ b/package/base-files/files/etc/sysctl.conf @@ -2,6 +2,9 @@ kernel.panic=3 kernel.core_pattern=/tmp/%e.%t.%p.%s.core fs.suid_dumpable=2 +#disable kernel pointer access from normal users +kernel.kptr_restrict=1 + net.ipv4.conf.default.arp_ignore=1 net.ipv4.conf.all.arp_ignore=1 net.ipv4.ip_forward=1 From patchwork Fri Mar 30 22:18:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rosen Penev X-Patchwork-Id: 893592 X-Patchwork-Delegate: blogic@openwrt.org Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=lede-dev-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="R1xsnadH"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="jwNVfckS"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40Cbck05wLz9s2b for ; Sat, 31 Mar 2018 09:19:01 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Subject:References: In-Reply-To:Message-Id:Date:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GrtlSqFY5xFUe82kH2JU9QQwf2Yoe63hR158oNu+M6Q=; b=R1xsnadHwDJqvQ BDdDV20n7/19iWfN96Ni+QTGrNF5xJ79pVZDLn7pgIY4oi3rrvtsVcNejEd77y+CUTb4ZQzCParNj ZmEY38m5DnjtqSei8vvCbhs1trl5NYQ5EvBnBjH7aTWqddLc00HN5uQ2A+3/mjRaXcR/CexhxKFFK oV8mRv4ViST04xe9oimotiQZ3F8dSinN8k+rseAW1sr0cETNFzPOzVNa5yhjAnZ+LBBHRyBAXhe/L 3rn1P/MjRki6iDKE9m9E0KuvjmUhH7uyWne5mRRftBTPI7ajvmadPWKMfZ3TZ14eRC11CTgHydSdc /FVygdcZOiLrtSEZX2RA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f22MF-0001YY-8t; Fri, 30 Mar 2018 22:18:51 +0000 Received: from mail-pg0-x242.google.com ([2607:f8b0:400e:c05::242]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f22Lk-0008E3-O7 for lede-dev@lists.infradead.org; Fri, 30 Mar 2018 22:18:22 +0000 Received: by mail-pg0-x242.google.com with SMTP id y16so5231622pgv.1 for ; Fri, 30 Mar 2018 15:18:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9VkdEAWH+tKOMpnJ2ibQXgsW2DaQzbG9sRlMnl47eg4=; b=jwNVfckS2tleVBbAiCH+dOND1+n5tXUjGMVhhHHk3aYx4S9XAFiUSTOYR81QIWxf5E 7b/sv7Rnc/pYUkbdlsNT3CF22dn+RQJcSg0q4LudUegeQm7BchcZQwsfj5cabIzctT73 0L5x1KLLBvA08lMI6JuUaYtW2DSi6qOeQXP7SyPliX9YxctCnureGAaQxill26aNILeR ReHVlTPHBV6rdfDVb3sIICvba30lmxnK4BNj6bntbUD7oIcR9o18J5lPuP0PcYnvTLUK 4sZhnBdRTwitj+Rc6f8kx05gFudjNHyzY1YZyhDNJHUgbpJDsqRSdwRCvpj5bzU2E8pa jWMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9VkdEAWH+tKOMpnJ2ibQXgsW2DaQzbG9sRlMnl47eg4=; b=YCZ06Cm0i1Ww3UGm50A9tkoBtt4YlMunlmoWfOjC3qNrGz48Lz6pPkGdUuqk+CRwU7 9tCQiAXvpGoS3EYp0aEXKWmNG8IEBrBmPuoihXIkCCPXBIbyNhM4ufAgtc+XssT9Pver JMwjko0RCPruAgA03U+5yd5xKjd3VgZScKwX7U/4FwEjhgt/uFOjxgZHnxVhZsMH+Ht7 MG126ZKJ3mIxaCfuxwoT3+6tIEmkxMdvDJMPR+qgP+qYXMSLuqhm5rw1nKboc2L3pBla Uepzna/VNI1vFWYOT7f+2l87Ogt8ny4H5Skv9G8mojPDLNdxjD8XoiMiRdZv6JK0Kf9h Av3A== X-Gm-Message-State: AElRT7Gi5opKYsggB/Y4VF70vBsxSWJv4UzPZfVKeT22cos73fLeJQ2i /sVQf/VxY7Z651CsudqmmCgVUHt3 X-Google-Smtp-Source: AIpwx4+t/9umcBzJNZkitY1mTHGvN/YkJzM+QazLbXIjCauWK4UXmY+/OPDzfVDtkUR4wHlcC8np7w== X-Received: by 10.99.186.14 with SMTP id k14mr459404pgf.43.1522448290864; Fri, 30 Mar 2018 15:18:10 -0700 (PDT) Received: from desktop.lan (astound-69-42-5-101.ca.astound.net. [69.42.5.101]) by smtp.gmail.com with ESMTPSA id v18sm15512887pgb.23.2018.03.30.15.18.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Mar 2018 15:18:10 -0700 (PDT) From: Rosen Penev To: lede-dev@lists.infradead.org Date: Fri, 30 Mar 2018 15:18:04 -0700 Message-Id: <20180330221804.29241-3-rosenp@gmail.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180330221804.29241-1-rosenp@gmail.com> References: <20180330221804.29241-1-rosenp@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180330_151820_798468_839BB27B X-CRM114-Status: UNSURE ( 8.73 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.1 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:400e:c05:0:0:0:242 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rosenp[at]gmail.com) -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid Subject: [LEDE-DEV] [PATCH 3/3] sysctl: Protect hard/symlinks by default. X-BeenThere: lede-dev@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rosen Penev MIME-Version: 1.0 Sender: "Lede-dev" Errors-To: lede-dev-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org There is no usecase for not protecting symlinks that I know of in OpenWrt. Not even on desktop systems where you have multiple users with a shell. Signed-off-by: Rosen Penev --- package/base-files/files/etc/sysctl.conf | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/package/base-files/files/etc/sysctl.conf b/package/base-files/files/etc/sysctl.conf index 61a43057a1..790fc02654 100644 --- a/package/base-files/files/etc/sysctl.conf +++ b/package/base-files/files/etc/sysctl.conf @@ -5,6 +5,10 @@ fs.suid_dumpable=2 #disable kernel pointer access from normal users kernel.kptr_restrict=1 +#enable hard/symlink protection +fs.protected_hardlinks=1 +fs.protected_symlinks=1 + net.ipv4.conf.default.arp_ignore=1 net.ipv4.conf.all.arp_ignore=1 net.ipv4.ip_forward=1