go-runtime: Security fix for CVE-2022-41722

path/filepath: do not Clean("a/../c:/b") into c:\b on Windows

Backport from https://github.com/golang/go/commit/bdf07c2e168baf736e4c057279ca12a4d674f18c

(From OE-Core rev: f60637b3c9045656047d6ffcfaadbef5ad1d3d06)

Signed-off-by: Shubham Kulkarni <skulkarni@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 104 insertions, 0 deletions

diff --git a/meta/recipes-devtools/go/go-1.17.13.inc b/meta/recipes-devtools/go/go-1.17.13.inc
index 23380f04c3..15d19ed124 100644
--- a/meta/recipes-devtools/go/go-1.17.13.inc
+++ b/meta/recipes-devtools/go/go-1.17.13.inc
@@ -26,6 +26,7 @@ SRC_URI += "\
     file://cve-2022-41724.patch \
     file://add_godebug.patch \
     file://cve-2022-41725.patch \
+    file://CVE-2022-41722.patch \
 "
 SRC_URI[main.sha256sum] = "a1a48b23afb206f95e7bbaa9b898d965f90826f6f1d1fc0c1d784ada0cd300fd"
 
diff --git a/meta/recipes-devtools/go/go-1.18/CVE-2022-41722.patch b/meta/recipes-devtools/go/go-1.18/CVE-2022-41722.patch
new file mode 100644
index 0000000000..426a4f925f
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.18/CVE-2022-41722.patch
@@ -0,0 +1,103 @@
+From a826b19625caebed6dd0f3fbd9d0111f6c83737c Mon Sep 17 00:00:00 2001
+From: Damien Neil <dneil@google.com>
+Date: Mon, 12 Dec 2022 16:43:37 -0800
+Subject: [PATCH] path/filepath: do not Clean("a/../c:/b") into c:\b on Windows
+
+Do not permit Clean to convert a relative path into one starting
+with a drive reference. This change causes Clean to insert a .
+path element at the start of a path when the original path does not
+start with a volume name, and the first path element would contain
+a colon.
+
+This may introduce a spurious but harmless . path element under
+some circumstances. For example, Clean("a/../b:/../c") becomes `.\c`.
+
+This reverts CL 401595, since the change here supersedes the one
+in that CL.
+
+Thanks to RyotaK (https://twitter.com/ryotkak) for reporting this issue.
+
+Updates #57274
+Fixes #57276
+Fixes CVE-2022-41722
+
+Change-Id: I837446285a03aa74c79d7642720e01f354c2ca17
+Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1675249
+Reviewed-by: Roland Shoemaker <bracewell@google.com>
+Run-TryBot: Damien Neil <dneil@google.com>
+Reviewed-by: Julie Qiu <julieqiu@google.com>
+TryBot-Result: Security TryBots <security-trybots@go-security-trybots.iam.gserviceaccount.com>
+(cherry picked from commit 8ca37f4813ef2f64600c92b83f17c9f3ca6c03a5)
+Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1728944
+Run-TryBot: Roland Shoemaker <bracewell@google.com>
+Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
+Reviewed-by: Damien Neil <dneil@google.com>
+Reviewed-on: https://go-review.googlesource.com/c/go/+/468119
+Reviewed-by: Than McIntosh <thanm@google.com>
+Run-TryBot: Michael Pratt <mpratt@google.com>
+TryBot-Result: Gopher Robot <gobot@golang.org>
+Auto-Submit: Michael Pratt <mpratt@google.com>
+
+CVE: CVE-2022-41722
+Upstream-Status: Backport from https://github.com/golang/go/commit/bdf07c2e168baf736e4c057279ca12a4d674f18
+Signed-off-by: Shubham Kulkarni <skulkarni@mvista.com>
+---
+ src/path/filepath/path.go | 27 ++++++++++++++-------------
+ 1 file changed, 14 insertions(+), 13 deletions(-)
+
+diff --git a/src/path/filepath/path.go b/src/path/filepath/path.go
+index 8300a32..94621a0 100644
+--- a/src/path/filepath/path.go
++++ b/src/path/filepath/path.go
+@@ -15,6 +15,7 @@ import (
+        "errors"
+        "io/fs"
+        "os"
++       "runtime"
+        "sort"
+        "strings"
+ )
+@@ -117,21 +118,9 @@ func Clean(path string) string {
+                case os.IsPathSeparator(path[r]):
+                        // empty path element
+                        r++
+-               case path[r] == '.' && r+1 == n:
++               case path[r] == '.' && (r+1 == n || os.IsPathSeparator(path[r+1])):
+                        // . element
+                        r++
+-               case path[r] == '.' && os.IsPathSeparator(path[r+1]):
+-                       // ./ element
+-                       r++
+-
+-                       for r < len(path) && os.IsPathSeparator(path[r]) {
+-                               r++
+-                       }
+-                       if out.w == 0 && volumeNameLen(path[r:]) > 0 {
+-                               // When joining prefix "." and an absolute path on Windows,
+-                               // the prefix should not be removed.
+-                               out.append('.')
+-                       }
+                case path[r] == '.' && path[r+1] == '.' && (r+2 == n || os.IsPathSeparator(path[r+2])):
+                        // .. element: remove to last separator
+                        r += 2
+@@ -157,6 +146,18 @@ func Clean(path string) string {
+                        if rooted && out.w != 1 || !rooted && out.w != 0 {
+                                out.append(Separator)
+                        }
++                       // If a ':' appears in the path element at the start of a Windows path,
++                       // insert a .\ at the beginning to avoid converting relative paths
++                       // like a/../c: into c:.
++                       if runtime.GOOS == "windows" && out.w == 0 && out.volLen == 0 && r != 0 {
++                               for i := r; i < n && !os.IsPathSeparator(path[i]); i++ {
++                                       if path[i] == ':' {
++                                               out.append('.')
++                                               out.append(Separator)
++                                               break
++                                       }
++                               }
++                       }
+                        // copy element
+                        for ; r < n && !os.IsPathSeparator(path[r]); r++ {
+                                out.append(path[r])
+--
+2.7.4