From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA86CC64EB1 for ; Thu, 6 Dec 2018 14:52:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B0E9320850 for ; Thu, 6 Dec 2018 14:52:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544107945; bh=wKB4lH7HY4LwE6YVrSN19qerz8Arc4wjWPmdZkmUiZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yE6PKvVIR12+BGHv+mnikw3QBa2bMdEFyo3qj1e//nQQ04b6wRnM4/KxGVnVqF47k t4cHJOE4kCzi8jJC09QQ3xlNAxZqiDKuoBu5Hx4pYDC4ZcdxNtoPWiXJgIQgXm16Jf huT8pzW1aZH+7yK6GFJYF8YX3Qa0KFjmRK95VY94= DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B0E9320850 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726173AbeLFOwY (ORCPT ); Thu, 6 Dec 2018 09:52:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:50864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731189AbeLFOqJ (ORCPT ); Thu, 6 Dec 2018 09:46:09 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 010F320661; Thu, 6 Dec 2018 14:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544107568; bh=wKB4lH7HY4LwE6YVrSN19qerz8Arc4wjWPmdZkmUiZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BvVn1xSt15YAiq39dss8zpVIBQk8fG0J1u4LAZLX8e0OAe1CdvfomzLTGg2jyhP4j IBEZuAsG6btwMqpGkDVqhM+zxYVusL7f+YmxxVu3VUZ+YUUWhBqMRmfVqzF4/94IPe XFjTMfl/W+3AZhjdUdjy98F74eHpS134/mkFhSAs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ilya Dryomov , Sage Weil , Ben Hutchings Subject: [PATCH 4.9 055/101] libceph: implement CEPHX_V2 calculation mode Date: Thu, 6 Dec 2018 15:38:54 +0100 Message-Id: <20181206143014.720460465@linuxfoundation.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181206143011.174892052@linuxfoundation.org> References: <20181206143011.174892052@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ilya Dryomov commit cc255c76c70f7a87d97939621eae04b600d9f4a1 upstream. Derive the signature from the entire buffer (both AES cipher blocks) instead of using just the first half of the first block, leaving out data_crc entirely. This addresses CVE-2018-1129. Link: http://tracker.ceph.com/issues/24837 Signed-off-by: Ilya Dryomov Reviewed-by: Sage Weil [bwh: Backported to 4.9: - Define and test the feature bit in the old way - Don't change any other feature bits in ceph_features.h] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman --- include/linux/ceph/ceph_features.h | 4 + net/ceph/auth_x.c | 77 +++++++++++++++++++++++++++---------- 2 files changed, 61 insertions(+), 20 deletions(-) --- a/include/linux/ceph/ceph_features.h +++ b/include/linux/ceph/ceph_features.h @@ -76,6 +76,7 @@ // duplicated since it was introduced at the same time as CEPH_FEATURE_CRUSH_TUNABLES5 #define CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING (1ULL<<58) /* New, v7 encoding */ #define CEPH_FEATURE_FS_FILE_LAYOUT_V2 (1ULL<<58) /* file_layout_t */ +#define CEPH_FEATURE_CEPHX_V2 (1ULL<<61) // *do not share this bit* /* * The introduction of CEPH_FEATURE_OSD_SNAPMAPPER caused the feature @@ -124,7 +125,8 @@ static inline u64 ceph_sanitize_features CEPH_FEATURE_MSGR_KEEPALIVE2 | \ CEPH_FEATURE_CRUSH_V4 | \ CEPH_FEATURE_CRUSH_TUNABLES5 | \ - CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING) + CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING | \ + CEPH_FEATURE_CEPHX_V2) #define CEPH_FEATURES_REQUIRED_DEFAULT \ (CEPH_FEATURE_NOSRCADDR | \ --- a/net/ceph/auth_x.c +++ b/net/ceph/auth_x.c @@ -8,6 +8,7 @@ #include #include +#include #include #include @@ -799,26 +800,64 @@ static int calc_signature(struct ceph_x_ __le64 *psig) { void *enc_buf = au->enc_buf; - struct { - __le32 len; - __le32 header_crc; - __le32 front_crc; - __le32 middle_crc; - __le32 data_crc; - } __packed *sigblock = enc_buf + ceph_x_encrypt_offset(); - int ret; - - sigblock->len = cpu_to_le32(4*sizeof(u32)); - sigblock->header_crc = msg->hdr.crc; - sigblock->front_crc = msg->footer.front_crc; - sigblock->middle_crc = msg->footer.middle_crc; - sigblock->data_crc = msg->footer.data_crc; - ret = ceph_x_encrypt(&au->session_key, enc_buf, CEPHX_AU_ENC_BUF_LEN, - sizeof(*sigblock)); - if (ret < 0) - return ret; + int ret; + + if (msg->con->peer_features & CEPH_FEATURE_CEPHX_V2) { + struct { + __le32 len; + __le32 header_crc; + __le32 front_crc; + __le32 middle_crc; + __le32 data_crc; + } __packed *sigblock = enc_buf + ceph_x_encrypt_offset(); + + sigblock->len = cpu_to_le32(4*sizeof(u32)); + sigblock->header_crc = msg->hdr.crc; + sigblock->front_crc = msg->footer.front_crc; + sigblock->middle_crc = msg->footer.middle_crc; + sigblock->data_crc = msg->footer.data_crc; + + ret = ceph_x_encrypt(&au->session_key, enc_buf, + CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock)); + if (ret < 0) + return ret; + + *psig = *(__le64 *)(enc_buf + sizeof(u32)); + } else { + struct { + __le32 header_crc; + __le32 front_crc; + __le32 front_len; + __le32 middle_crc; + __le32 middle_len; + __le32 data_crc; + __le32 data_len; + __le32 seq_lower_word; + } __packed *sigblock = enc_buf; + struct { + __le64 a, b, c, d; + } __packed *penc = enc_buf; + int ciphertext_len; + + sigblock->header_crc = msg->hdr.crc; + sigblock->front_crc = msg->footer.front_crc; + sigblock->front_len = msg->hdr.front_len; + sigblock->middle_crc = msg->footer.middle_crc; + sigblock->middle_len = msg->hdr.middle_len; + sigblock->data_crc = msg->footer.data_crc; + sigblock->data_len = msg->hdr.data_len; + sigblock->seq_lower_word = *(__le32 *)&msg->hdr.seq; + + /* no leading len, no ceph_x_encrypt_header */ + ret = ceph_crypt(&au->session_key, true, enc_buf, + CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock), + &ciphertext_len); + if (ret) + return ret; + + *psig = penc->a ^ penc->b ^ penc->c ^ penc->d; + } - *psig = *(__le64 *)(enc_buf + sizeof(u32)); return 0; }