From patchwork Mon Nov 22 08:34:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Mittal, Anuj" X-Patchwork-Id: 289 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE6BCC433EF for ; Mon, 22 Nov 2021 08:34:16 +0000 (UTC) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by mx.groups.io with SMTP id smtpd.web11.3862.1637570053453876204 for ; Mon, 22 Nov 2021 00:34:16 -0800 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: intel.com, ip: 192.55.52.93, mailfrom: anuj.mittal@intel.com) X-IronPort-AV: E=McAfee;i="6200,9189,10175"; a="232231992" X-IronPort-AV: E=Sophos;i="5.87,254,1631602800"; d="scan'208";a="232231992" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2021 00:34:15 -0800 X-IronPort-AV: E=Sophos;i="5.87,254,1631602800"; d="scan'208";a="508448610" Received: from amohdwah-mobl1.gar.corp.intel.com (HELO anmitta2-mobl3.intel.com) ([10.215.239.176]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2021 00:34:14 -0800 From: Anuj Mittal To: openembedded-core@lists.openembedded.org Subject: [honister][PATCH 2/5] glibc: Backport fix for CVE-2021-43396 Date: Mon, 22 Nov 2021 16:34:03 +0800 Message-Id: <8d7a88bdee734df527a0ed954a25f27ac975071f.1637569916.git.anuj.mittal@intel.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 22 Nov 2021 08:34:16 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/158556 From: Richard Purdie Backport the fix for CVE-2021-43396. It is disputed that this is a security issue however the fix applies easily so we may as well. Signed-off-by: Richard Purdie (cherry picked from commit e8de9b01c6b305b2498c5f942397a49ae2af0cde) Signed-off-by: Anuj Mittal --- .../glibc/glibc/CVE-2021-43396.patch | 184 ++++++++++++++++++ meta/recipes-core/glibc/glibc_2.34.bb | 1 + 2 files changed, 185 insertions(+) create mode 100644 meta/recipes-core/glibc/glibc/CVE-2021-43396.patch diff --git a/meta/recipes-core/glibc/glibc/CVE-2021-43396.patch b/meta/recipes-core/glibc/glibc/CVE-2021-43396.patch new file mode 100644 index 0000000000..ebea5efd34 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/CVE-2021-43396.patch @@ -0,0 +1,184 @@ +From ff012870b2c02a62598c04daa1e54632e020fd7d Mon Sep 17 00:00:00 2001 +From: Nikita Popov +Date: Tue, 2 Nov 2021 13:21:42 +0500 +Subject: [PATCH] gconv: Do not emit spurious NUL character in ISO-2022-JP-3 + (bug 28524) + +Bugfix 27256 has introduced another issue: +In conversion from ISO-2022-JP-3 encoding, it is possible +to force iconv to emit extra NUL character on internal state reset. +To do this, it is sufficient to feed iconv with escape sequence +which switches active character set. +The simplified check 'data->__statep->__count != ASCII_set' +introduced by the aforementioned bugfix picks that case and +behaves as if '\0' character has been queued thus emitting it. + +To eliminate this issue, these steps are taken: +* Restore original condition +'(data->__statep->__count & ~7) != ASCII_set'. +It is necessary since bits 0-2 may contain +number of buffered input characters. +* Check that queued character is not NUL. +Similar step is taken for main conversion loop. + +Bundled test case follows following logic: +* Try to convert ISO-2022-JP-3 escape sequence +switching active character set +* Reset internal state by providing NULL as input buffer +* Ensure that nothing has been converted. + +Signed-off-by: Nikita Popov + +CVE: CVE-2021-43396 +Upstream-Status: Backport [ff012870b2c02a62598c04daa1e54632e020fd7d] +--- + iconvdata/Makefile | 5 +++- + iconvdata/bug-iconv15.c | 60 +++++++++++++++++++++++++++++++++++++++ + iconvdata/iso-2022-jp-3.c | 28 ++++++++++++------ + 3 files changed, 84 insertions(+), 9 deletions(-) + create mode 100644 iconvdata/bug-iconv15.c + +Index: git/iconvdata/Makefile +=================================================================== +--- git.orig/iconvdata/Makefile ++++ git/iconvdata/Makefile +@@ -1,4 +1,5 @@ + # Copyright (C) 1997-2021 Free Software Foundation, Inc. ++# Copyright (C) The GNU Toolchain Authors. + # This file is part of the GNU C Library. + + # The GNU C Library is free software; you can redistribute it and/or +@@ -74,7 +75,7 @@ ifeq (yes,$(build-shared)) + tests = bug-iconv1 bug-iconv2 tst-loading tst-e2big tst-iconv4 bug-iconv4 \ + tst-iconv6 bug-iconv5 bug-iconv6 tst-iconv7 bug-iconv8 bug-iconv9 \ + bug-iconv10 bug-iconv11 bug-iconv12 tst-iconv-big5-hkscs-to-2ucs4 \ +- bug-iconv13 bug-iconv14 ++ bug-iconv13 bug-iconv14 bug-iconv15 + ifeq ($(have-thread-library),yes) + tests += bug-iconv3 + endif +@@ -327,6 +328,8 @@ $(objpfx)bug-iconv12.out: $(addprefix $( + $(addprefix $(objpfx),$(modules.so)) + $(objpfx)bug-iconv14.out: $(addprefix $(objpfx), $(gconv-modules)) \ + $(addprefix $(objpfx),$(modules.so)) ++$(objpfx)bug-iconv15.out: $(addprefix $(objpfx), $(gconv-modules)) \ ++ $(addprefix $(objpfx),$(modules.so)) + + $(objpfx)iconv-test.out: run-iconv-test.sh \ + $(addprefix $(objpfx), $(gconv-modules)) \ +Index: git/iconvdata/bug-iconv15.c +=================================================================== +--- /dev/null ++++ git/iconvdata/bug-iconv15.c +@@ -0,0 +1,60 @@ ++/* Bug 28524: Conversion from ISO-2022-JP-3 with iconv ++ may emit spurious NUL character on state reset. ++ Copyright (C) The GNU Toolchain Authors. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ . */ ++ ++#include ++#include ++#include ++ ++static int ++do_test (void) ++{ ++ char in[] = "\x1b(I"; ++ char *inbuf = in; ++ size_t inleft = sizeof (in) - 1; ++ char out[1]; ++ char *outbuf = out; ++ size_t outleft = sizeof (out); ++ iconv_t cd; ++ ++ cd = iconv_open ("UTF8", "ISO-2022-JP-3"); ++ TEST_VERIFY_EXIT (cd != (iconv_t) -1); ++ ++ /* First call to iconv should alter internal state. ++ Now, JISX0201_Kana_set is selected and ++ state value != ASCII_set. */ ++ TEST_VERIFY (iconv (cd, &inbuf, &inleft, &outbuf, &outleft) != (size_t) -1); ++ ++ /* No bytes should have been added to ++ the output buffer at this point. */ ++ TEST_VERIFY (outbuf == out); ++ TEST_VERIFY (outleft == sizeof (out)); ++ ++ /* Second call shall emit spurious NUL character in unpatched glibc. */ ++ TEST_VERIFY (iconv (cd, NULL, NULL, &outbuf, &outleft) != (size_t) -1); ++ ++ /* No characters are expected to be produced. */ ++ TEST_VERIFY (outbuf == out); ++ TEST_VERIFY (outleft == sizeof (out)); ++ ++ TEST_VERIFY_EXIT (iconv_close (cd) != -1); ++ ++ return 0; ++} ++ ++#include +Index: git/iconvdata/iso-2022-jp-3.c +=================================================================== +--- git.orig/iconvdata/iso-2022-jp-3.c ++++ git/iconvdata/iso-2022-jp-3.c +@@ -1,5 +1,6 @@ + /* Conversion module for ISO-2022-JP-3. + Copyright (C) 1998-2021 Free Software Foundation, Inc. ++ Copyright (C) The GNU Toolchain Authors. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1998, + and Bruno Haible , 2002. +@@ -81,20 +82,31 @@ enum + the output state to the initial state. This has to be done during the + flushing. */ + #define EMIT_SHIFT_TO_INIT \ +- if (data->__statep->__count != ASCII_set) \ ++ if ((data->__statep->__count & ~7) != ASCII_set) \ + { \ + if (FROM_DIRECTION) \ + { \ +- if (__glibc_likely (outbuf + 4 <= outend)) \ ++ uint32_t ch = data->__statep->__count >> 6; \ ++ \ ++ if (__glibc_unlikely (ch != 0)) \ + { \ +- /* Write out the last character. */ \ +- *((uint32_t *) outbuf) = data->__statep->__count >> 6; \ +- outbuf += sizeof (uint32_t); \ +- data->__statep->__count = ASCII_set; \ ++ if (__glibc_likely (outbuf + 4 <= outend)) \ ++ { \ ++ /* Write out the last character. */ \ ++ put32u (outbuf, ch); \ ++ outbuf += 4; \ ++ data->__statep->__count &= 7; \ ++ data->__statep->__count |= ASCII_set; \ ++ } \ ++ else \ ++ /* We don't have enough room in the output buffer. */ \ ++ status = __GCONV_FULL_OUTPUT; \ + } \ + else \ +- /* We don't have enough room in the output buffer. */ \ +- status = __GCONV_FULL_OUTPUT; \ ++ { \ ++ data->__statep->__count &= 7; \ ++ data->__statep->__count |= ASCII_set; \ ++ } \ + } \ + else \ + { \ diff --git a/meta/recipes-core/glibc/glibc_2.34.bb b/meta/recipes-core/glibc/glibc_2.34.bb index 6dc315c349..7206477278 100644 --- a/meta/recipes-core/glibc/glibc_2.34.bb +++ b/meta/recipes-core/glibc/glibc_2.34.bb @@ -58,6 +58,7 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \ file://0001-CVE-2021-38604.patch \ file://0002-CVE-2021-38604.patch \ file://0001-fix-create-thread-failed-in-unprivileged-process-BZ-.patch \ + file://CVE-2021-43396.patch \ " S = "${WORKDIR}/git" B = "${WORKDIR}/build-${TARGET_SYS}"