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```release-note:security | ||
security: Fixed a bug in client FS API where the check to prevent reads from the secrets dir could be bypassed on case-insensitive file systems | ||
``` |
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// Copyright (c) HashiCorp, Inc. | ||
// SPDX-License-Identifier: BUSL-1.1 | ||
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//go:build !linux | ||
// +build !linux | ||
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package allocdir | ||
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import ( | ||
"os" | ||
"path/filepath" | ||
"testing" | ||
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"github.com/hashicorp/nomad/ci" | ||
"github.com/hashicorp/nomad/helper/testlog" | ||
"github.com/hashicorp/nomad/nomad/structs" | ||
"github.com/hashicorp/nomad/plugins/drivers/fsisolation" | ||
"github.com/shoenig/test/must" | ||
) | ||
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func TestAllocDir_ReadAt_CaseInsensitiveSecretDir(t *testing.T) { | ||
ci.Parallel(t) | ||
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// On macOS, os.TempDir returns a symlinked path under /var which | ||
// is outside of the directories shared into the VM used for Docker. | ||
// Expand the symlink to get the real path in /private, which is ok. | ||
tmp, err := filepath.EvalSymlinks(t.TempDir()) | ||
must.NoError(t, err) | ||
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d := NewAllocDir(testlog.HCLogger(t), tmp, tmp, "test") | ||
must.NoError(t, d.Build()) | ||
defer func() { _ = d.Destroy() }() | ||
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td := d.NewTaskDir(t1Windows) | ||
must.NoError(t, td.Build(fsisolation.None, nil, "nobody")) | ||
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target := filepath.Join(t1Windows.Name, TaskSecrets, "test_file") | ||
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full := filepath.Join(d.AllocDir, target) | ||
must.NoError(t, os.WriteFile(full, []byte("hi"), 0o600)) | ||
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targetCaseInsensitive := filepath.Join(t1Windows.Name, "sEcReTs", "test_file") | ||
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_, err = d.ReadAt(targetCaseInsensitive, 0) | ||
must.EqError(t, err, "Reading secret file prohibited: "+targetCaseInsensitive) | ||
} | ||
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var ( | ||
t1Windows = &structs.Task{ | ||
Name: "web", | ||
Driver: "exec", | ||
Config: map[string]interface{}{ | ||
"command": "/bin/date", | ||
"args": "+%s", | ||
}, | ||
Resources: &structs.Resources{ | ||
DiskMB: 1, | ||
}, | ||
} | ||
) |
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