Sync from SUSE:SLFO:Main buildah revision f6fbf7726e04b6f8bd12a68ed0d2c668

This commit is contained in:
Adrian Schröter 2024-10-18 15:37:29 +02:00
parent 9df1ac9980
commit ca1eaa3cba
5 changed files with 133 additions and 6 deletions

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@ -1,7 +1,7 @@
From 222f80a6a2ab4efce95bb7c8da3606b5ad4a3170 Mon Sep 17 00:00:00 2001
From: Nalin Dahyabhai <nalin@redhat.com>
Date: Tue, 1 Oct 2024 11:01:45 -0400
Subject: [PATCH 1/2] CVE-2024-9407: validate "bind-propagation" flag settings
Subject: [PATCH 1/3] CVE-2024-9407: validate "bind-propagation" flag settings
CVE-2024-9407: validate that the value for the "bind-propagation" flag
when handling "bind" and "cache" mounts in `buildah run` or in RUN
@ -10,12 +10,13 @@ instructions is one of the values that we would accept without the
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
(cherry picked from commit 732f77064830bb91062d475407b761ade2e4fe6b)
Signed-off-by: Danish Prakash <contact@danishpraka.sh>
---
internal/volumes/volumes.go | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/internal/volumes/volumes.go b/internal/volumes/volumes.go
index 515f846f3..da6b768fd 100644
index 515f846f3499..da6b768fdc21 100644
--- a/internal/volumes/volumes.go
+++ b/internal/volumes/volumes.go
@@ -105,6 +105,12 @@ func GetBindMount(ctx *types.SystemContext, args []string, contextDir string, st
@ -45,5 +46,5 @@ index 515f846f3..da6b768fd 100644
case "id":
if !hasArgValue {
--
2.46.2
2.46.0

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@ -1,7 +1,7 @@
From 290dbe53fdc8c31aa51f0851c57bda0f195fc1a6 Mon Sep 17 00:00:00 2001
From: Paul Holzinger <pholzing@redhat.com>
Date: Wed, 2 Oct 2024 12:15:15 +0200
Subject: [PATCH 2/2] [conmon] pkg/subscriptions: use securejoin for the
Subject: [PATCH 2/3] [conmon] pkg/subscriptions: use securejoin for the
container path
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
@ -17,12 +17,13 @@ https://github.com/containers/common/commit/5a550b6fe26068dd1d5d2616c8595edf10b4
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Signed-off-by: Dan Čermák <dcermak@suse.com>
Signed-off-by: Danish Prakash <contact@danishpraka.sh>
---
.../containers/common/pkg/subscriptions/subscriptions.go | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/vendor/github.com/containers/common/pkg/subscriptions/subscriptions.go b/vendor/github.com/containers/common/pkg/subscriptions/subscriptions.go
index 6845914aa..71ee68a59 100644
index 6845914aa285..71ee68a5909c 100644
--- a/vendor/github.com/containers/common/pkg/subscriptions/subscriptions.go
+++ b/vendor/github.com/containers/common/pkg/subscriptions/subscriptions.go
@@ -10,6 +10,7 @@ import (
@ -47,5 +48,5 @@ index 6845914aa..71ee68a59 100644
if errors.Is(err, os.ErrNotExist) {
return nil
--
2.46.2
2.46.0

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@ -0,0 +1,115 @@
From b48b2e689270ee7cc8c13464cbae1b5405fcb901 Mon Sep 17 00:00:00 2001
From: Matt Heon <mheon@redhat.com>
Date: Wed, 9 Oct 2024 15:23:03 -0400
Subject: [PATCH 3/3] Properly validate cache IDs and sources
The `--mount type=cache` argument to the `RUN` instruction in
Dockerfiles was using `filepath.Join` on user input, allowing
crafted paths to be used to gain access to paths on the host,
when the command should normally be limited only to Buildah;s own
cache and context directories. Switch to `filepath.SecureJoin` to
resolve the issue.
Fixes CVE-2024-9675
Signed-off-by: Matt Heon <mheon@redhat.com>
Signed-off-by: Danish Prakash <contact@danishpraka.sh>
---
internal/volumes/volumes.go | 22 +++++++++++++++-------
tests/bud.bats | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/internal/volumes/volumes.go b/internal/volumes/volumes.go
index da6b768fdc21..2dd04d9c32a4 100644
--- a/internal/volumes/volumes.go
+++ b/internal/volumes/volumes.go
@@ -23,6 +23,7 @@ import (
"github.com/containers/storage/pkg/idtools"
"github.com/containers/storage/pkg/lockfile"
"github.com/containers/storage/pkg/unshare"
+ digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/runtime-spec/specs-go"
selinux "github.com/opencontainers/selinux/go-selinux"
)
@@ -374,10 +375,13 @@ func GetCacheMount(args []string, store storage.Store, imageMountLabel string, a
return newMount, nil, fmt.Errorf("no stage found with name %s", fromStage)
}
// path should be /contextDir/specified path
- newMount.Source = filepath.Join(mountPoint, filepath.Clean(string(filepath.Separator)+newMount.Source))
+ evaluated, err := copier.Eval(mountPoint, string(filepath.Separator)+newMount.Source, copier.EvalOptions{})
+ if err != nil {
+ return newMount, nil, err
+ }
+ newMount.Source = evaluated
} else {
- // we need to create cache on host if no image is being used
-
+ // we need to create the cache directory on the host if no image is being used
// since type is cache and cache can be reused by consecutive builds
// create a common cache directory, which persists on hosts within temp lifecycle
// add subdirectory if specified
@@ -391,11 +395,15 @@ func GetCacheMount(args []string, store storage.Store, imageMountLabel string, a
}
if id != "" {
- newMount.Source = filepath.Join(cacheParent, filepath.Clean(id))
- buildahLockFilesDir = filepath.Join(BuildahCacheLockfileDir, filepath.Clean(id))
+ // Don't let the user control where we place the directory.
+ dirID := digest.FromString(id).Encoded()[:16]
+ newMount.Source = filepath.Join(cacheParent, dirID)
+ buildahLockFilesDir = filepath.Join(BuildahCacheLockfileDir, dirID)
} else {
- newMount.Source = filepath.Join(cacheParent, filepath.Clean(newMount.Destination))
- buildahLockFilesDir = filepath.Join(BuildahCacheLockfileDir, filepath.Clean(newMount.Destination))
+ // Don't let the user control where we place the directory.
+ dirID := digest.FromString(newMount.Destination).Encoded()[:16]
+ newMount.Source = filepath.Join(cacheParent, dirID)
+ buildahLockFilesDir = filepath.Join(BuildahCacheLockfileDir, dirID)
}
idPair := idtools.IDPair{
UID: uid,
diff --git a/tests/bud.bats b/tests/bud.bats
index b6982bbc0ee4..e28fc3dd8add 100644
--- a/tests/bud.bats
+++ b/tests/bud.bats
@@ -6659,3 +6659,37 @@ _EOF
assert "$status" -eq 2 "exit code from ls"
expect_output --substring "No such file or directory"
}
+
+@test "build-check-cve-2024-9675" {
+ _prefetch alpine
+
+ touch ${TEST_SCRATCH_DIR}/file.txt
+
+ cat > ${TEST_SCRATCH_DIR}/Containerfile <<EOF
+FROM alpine
+RUN --mount=type=cache,id=../../../../../../../../../../../$TEST_SCRATCH_DIR,target=/var/tmp \
+ls -l /var/tmp && cat /var/tmp/file.txt
+EOF
+
+ run_buildah 1 build --no-cache ${TEST_SCRATCH_DIR}
+ expect_output --substring "cat: can't open '/var/tmp/file.txt': No such file or directory"
+
+ cat > ${TEST_SCRATCH_DIR}/Containerfile <<EOF
+FROM alpine
+RUN --mount=type=cache,source=../../../../../../../../../../../$TEST_SCRATCH_DIR,target=/var/tmp \
+ls -l /var/tmp && cat /var/tmp/file.txt
+EOF
+
+ run_buildah 1 build --no-cache ${TEST_SCRATCH_DIR}
+ expect_output --substring "cat: can't open '/var/tmp/file.txt': No such file or directory"
+
+ mkdir ${TEST_SCRATCH_DIR}/cve20249675
+ cat > ${TEST_SCRATCH_DIR}/cve20249675/Containerfile <<EOF
+FROM alpine
+RUN --mount=type=cache,from=testbuild,source=../,target=/var/tmp \
+ls -l /var/tmp && cat /var/tmp/file.txt
+EOF
+
+ run_buildah 1 build --security-opt label=disable --build-context testbuild=${TEST_SCRATCH_DIR}/cve20249675/ --no-cache ${TEST_SCRATCH_DIR}/cve20249675/
+ expect_output --substring "cat: can't open '/var/tmp/file.txt': No such file or directory"
+}
--
2.46.0

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@ -1,3 +1,12 @@
-------------------------------------------------------------------
Wed Oct 16 06:53:35 UTC 2024 - Danish Prakash <danish.prakash@suse.com>
- Add patch for CVE-2024-9675 (bsc#1231499):
* 0003-Properly-validate-cache-IDs-and-sources.patch
- Rebase patches:
* 0001-CVE-2024-9407-validate-bind-propagation-flag-setting.patch
* 0002-conmon-pkg-subscriptions-use-securejoin-for-the-cont.patch
-------------------------------------------------------------------
Wed Oct 2 10:24:41 UTC 2024 - Dan Čermák <dcermak@suse.com>

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@ -29,6 +29,7 @@ Source0: %{name}-%{version}.tar.xz
Source1: %{name}-rpmlintrc
Patch0: 0001-CVE-2024-9407-validate-bind-propagation-flag-setting.patch
Patch1: 0002-conmon-pkg-subscriptions-use-securejoin-for-the-cont.patch
Patch2: 0003-Properly-validate-cache-IDs-and-sources.patch
BuildRequires: bash-completion
BuildRequires: device-mapper-devel
BuildRequires: fdupes