From patchwork Wed May 17 07:14:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hitendra Prajapati X-Patchwork-Id: 24068 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 2E1D7C77B7A for ; Wed, 17 May 2023 07:14:48 +0000 (UTC) Received: from mail-pj1-f51.google.com (mail-pj1-f51.google.com [209.85.216.51]) by mx.groups.io with SMTP id smtpd.web11.43849.1684307685063236600 for ; Wed, 17 May 2023 00:14:45 -0700 Authentication-Results: mx.groups.io; dkim=fail reason="signature has expired" header.i=@mvista.com header.s=google header.b=XXKSDUVr; spf=pass (domain: mvista.com, ip: 209.85.216.51, mailfrom: hprajapati@mvista.com) Received: by mail-pj1-f51.google.com with SMTP id 98e67ed59e1d1-24de2954bc5so400586a91.1 for ; Wed, 17 May 2023 00:14:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mvista.com; s=google; t=1684307684; x=1686899684; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=RLGbvRSJQiJ4NjCEQSVl0FP3d+9X2E1IUMLrA6PsySw=; b=XXKSDUVr42XIekVxgYCp/+JM5xnp+PllmPeb2kV6B8+4zqomvJo+yUewaU377QRtVx wBG2THAP7KNeJNdaZMOuoxEw8nJ7S9l9aURvjIOW3HCilWtswA6eSnMABqvRhmXV5le1 Vuxwh1X83fhkBEp1734Iep3K0VCRaTY2M+wOs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684307684; x=1686899684; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=RLGbvRSJQiJ4NjCEQSVl0FP3d+9X2E1IUMLrA6PsySw=; b=KNbBxcTi5Fp8W8btCeUsfEZVcCoHebm+NbdmZ79TasXya7tR+QJYc9CxMiOkExFF4N ZTiFfx1/zYx9ngs1OOZBxPEONnTPojSwZmOq6tWEQOdSExjcnKkPlLITlGRRLI218HZe PCt8S8uJZGQJra4M+yw8cCMfGUVOAwCXTUTijG7ei4gnRp13d3wsM9pkubhgkXMnYW89 Z+THueXok6ZaWrvl1AW4LYmqdx1p8xBzsSlDealbKu69dfN5jyv3Kq1O98wpsHZoZ0Y9 jACD9k/rFEZxwBR/mehJ/sa5eBVigwPBWmGsJ5yfQ+G+RXn5TNN8IkuBGrnzb/37lG+8 zoOg== X-Gm-Message-State: AC+VfDx1kMlQ7bQIuVUbq1WpdLODxWSlOPcRYSxTWPj9nRqYRFKcQOAX ZN4c7TpN42ojyvMeZ4LW7X65aMFtAERdYXmSric= X-Google-Smtp-Source: ACHHUZ7bCOK7xn2JOcSWVb5hSkUYTlG4esxFGQ7tuR/AgINAGST6yXLhuj+4mU5/XeOwx6iiEuPhuA== X-Received: by 2002:a17:90a:8a8d:b0:24e:69e:71f with SMTP id x13-20020a17090a8a8d00b0024e069e071fmr38276734pjn.7.1684307684149; Wed, 17 May 2023 00:14:44 -0700 (PDT) Received: from MVIN00024 ([43.249.234.155]) by smtp.gmail.com with ESMTPSA id 4-20020a170902e9c400b001a673210cf4sm16698555plk.74.2023.05.17.00.14.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 May 2023 00:14:43 -0700 (PDT) Received: by MVIN00024 (sSMTP sendmail emulation); Wed, 17 May 2023 12:44:38 +0530 From: Hitendra Prajapati To: openembedded-core@lists.openembedded.org Cc: Hitendra Prajapati Subject: [dunfell][PATCHv2] git: fix CVE-2023-25652 Date: Wed, 17 May 2023 12:44:37 +0530 Message-Id: <20230517071437.17612-1-hprajapati@mvista.com> X-Mailer: git-send-email 2.25.1 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 ; Wed, 17 May 2023 07:14:48 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/181448 Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, by feeding specially crafted input to `git apply --reject`, a path outside the working tree can be overwritten with partially controlled contents (corresponding to the rejected hunk(s) from the given patch). A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid using `git apply` with `--reject` when applying patches from an untrusted source. Use `git apply --stat` to inspect a patch before applying; avoid applying one that create a conflict where a link corresponding to the `*.rej` file exists. References: https://nvd.nist.gov/vuln/detail/CVE-2023-25652 Upstream-Status: Backport from https://github.com/git/git/commit/9db05711c98efc14f414d4c87135a34c13586e0b Signed-off-by: Hitendra Prajapati --- .../git/files/CVE-2023-25652.patch | 94 +++++++++++++++++++ meta/recipes-devtools/git/git.inc | 1 + 2 files changed, 95 insertions(+) create mode 100644 meta/recipes-devtools/git/files/CVE-2023-25652.patch diff --git a/meta/recipes-devtools/git/files/CVE-2023-25652.patch b/meta/recipes-devtools/git/files/CVE-2023-25652.patch new file mode 100644 index 0000000000..d6b17a2b8a --- /dev/null +++ b/meta/recipes-devtools/git/files/CVE-2023-25652.patch @@ -0,0 +1,94 @@ +From 9db05711c98efc14f414d4c87135a34c13586e0b Mon Sep 17 00:00:00 2001 +From: Johannes Schindelin +Date: Thu, 9 Mar 2023 16:02:54 +0100 +Subject: [PATCH] apply --reject: overwrite existing `.rej` symlink if it + exists + +The `git apply --reject` is expected to write out `.rej` files in case +one or more hunks fail to apply cleanly. Historically, the command +overwrites any existing `.rej` files. The idea being that +apply/reject/edit cycles are relatively common, and the generated `.rej` +files are not considered precious. + +But the command does not overwrite existing `.rej` symbolic links, and +instead follows them. This is unsafe because the same patch could +potentially create such a symbolic link and point at arbitrary paths +outside the current worktree, and `git apply` would write the contents +of the `.rej` file into that location. + +Therefore, let's make sure that any existing `.rej` file or symbolic +link is removed before writing it. + +Reported-by: RyotaK +Helped-by: Taylor Blau +Helped-by: Junio C Hamano +Helped-by: Linus Torvalds +Signed-off-by: Johannes Schindelin + +Upstream-Status: Backport [https://github.com/git/git/commit/9db05711c98efc14f414d4c87135a34c13586e0b] +CVE: CVE-2023-25652 +Signed-off-by: Hitendra Prajapati +--- + apply.c | 14 ++++++++++++-- + t/t4115-apply-symlink.sh | 15 +++++++++++++++ + 2 files changed, 27 insertions(+), 2 deletions(-) + +diff --git a/apply.c b/apply.c +index 4f303bf..aa7111d 100644 +--- a/apply.c ++++ b/apply.c +@@ -4531,7 +4531,7 @@ static int write_out_one_reject(struct apply_state *state, struct patch *patch) + FILE *rej; + char namebuf[PATH_MAX]; + struct fragment *frag; +- int cnt = 0; ++ int fd, cnt = 0; + struct strbuf sb = STRBUF_INIT; + + for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) { +@@ -4571,7 +4571,17 @@ static int write_out_one_reject(struct apply_state *state, struct patch *patch) + memcpy(namebuf, patch->new_name, cnt); + memcpy(namebuf + cnt, ".rej", 5); + +- rej = fopen(namebuf, "w"); ++ fd = open(namebuf, O_CREAT | O_EXCL | O_WRONLY, 0666); ++ if (fd < 0) { ++ if (errno != EEXIST) ++ return error_errno(_("cannot open %s"), namebuf); ++ if (unlink(namebuf)) ++ return error_errno(_("cannot unlink '%s'"), namebuf); ++ fd = open(namebuf, O_CREAT | O_EXCL | O_WRONLY, 0666); ++ if (fd < 0) ++ return error_errno(_("cannot open %s"), namebuf); ++ } ++ rej = fdopen(fd, "w"); + if (!rej) + return error_errno(_("cannot open %s"), namebuf); + +diff --git a/t/t4115-apply-symlink.sh b/t/t4115-apply-symlink.sh +index 1acb7b2..2b034ff 100755 +--- a/t/t4115-apply-symlink.sh ++++ b/t/t4115-apply-symlink.sh +@@ -125,4 +125,19 @@ test_expect_success SYMLINKS 'symlink escape when deleting file' ' + test_path_is_file .git/delete-me + ' + ++test_expect_success SYMLINKS '--reject removes .rej symlink if it exists' ' ++ test_when_finished "git reset --hard && git clean -dfx" && ++ ++ test_commit file && ++ echo modified >file.t && ++ git diff -- file.t >patch && ++ echo modified-again >file.t && ++ ++ ln -s foo file.t.rej && ++ test_must_fail git apply patch --reject 2>err && ++ test_i18ngrep "Rejected hunk" err && ++ test_path_is_missing foo && ++ test_path_is_file file.t.rej ++' ++ + test_done +-- +2.25.1 + diff --git a/meta/recipes-devtools/git/git.inc b/meta/recipes-devtools/git/git.inc index 8b864053eb..e64472ea28 100644 --- a/meta/recipes-devtools/git/git.inc +++ b/meta/recipes-devtools/git/git.inc @@ -29,6 +29,7 @@ SRC_URI = "${KERNELORG_MIRROR}/software/scm/git/git-${PV}.tar.gz;name=tarball \ file://CVE-2023-22490-3.patch \ file://CVE-2023-23946.patch \ file://CVE-2023-29007.patch \ + file://CVE-2023-25652.patch \ " S = "${WORKDIR}/git-${PV}"