patch: fix CVE-2019-13638

(From OE-Core rev: b59b1222b3f73f982286222a583de09c661dc781)

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 45 insertions, 0 deletions

diff --git a/meta/recipes-devtools/patch/patch/0001-Invoke-ed-directly-instead-of-using-the-shell.patch b/meta/recipes-devtools/patch/patch/0001-Invoke-ed-directly-instead-of-using-the-shell.patch
new file mode 100644
index 0000000000..f60dfe879a
--- /dev/null
+++ b/meta/recipes-devtools/patch/patch/0001-Invoke-ed-directly-instead-of-using-the-shell.patch
@@ -0,0 +1,44 @@
+From 3fcd042d26d70856e826a42b5f93dc4854d80bf0 Mon Sep 17 00:00:00 2001
+From: Andreas Gruenbacher <agruen@gnu.org>
+Date: Fri, 6 Apr 2018 19:36:15 +0200
+Subject: [PATCH] Invoke ed directly instead of using the shell
+
+* src/pch.c (do_ed_script): Invoke ed directly instead of using a shell
+command to avoid quoting vulnerabilities.
+
+CVE: CVE-2019-13638
+Upstream-Status: Backport[https://git.savannah.gnu.org/cgit/patch.git/patch/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0]
+Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
+
+---
+ src/pch.c | 6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+
+diff --git a/src/pch.c b/src/pch.c
+index 4fd5a05..16e001a 100644
+--- a/src/pch.c
++++ b/src/pch.c
+@@ -2459,9 +2459,6 @@ do_ed_script (char const *inname, char const *outname,
+            *outname_needs_removal = true;
+            copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
+          }
+-       sprintf (buf, "%s %s%s", editor_program,
+-                verbosity == VERBOSE ? "" : "- ",
+-                outname);
+        fflush (stdout);
+ 
+        pid = fork();
+@@ -2470,7 +2467,8 @@ do_ed_script (char const *inname, char const *outname,
+        else if (pid == 0)
+          {
+            dup2 (tmpfd, 0);
+-           execl ("/bin/sh", "sh", "-c", buf, (char *) 0);
++           assert (outname[0] != '!' && outname[0] != '-');
++           execlp (editor_program, editor_program, "-", outname, (char  *) NULL);
+            _exit (2);
+          }
+        else
+-- 
+2.7.4
+
diff --git a/meta/recipes-devtools/patch/patch_2.7.6.bb b/meta/recipes-devtools/patch/patch_2.7.6.bb
index 8cf20a3597..8908910f74 100644
--- a/meta/recipes-devtools/patch/patch_2.7.6.bb
+++ b/meta/recipes-devtools/patch/patch_2.7.6.bb
@@ -7,6 +7,7 @@ SRC_URI += "file://0001-Unset-need_charset_alias-when-building-for-musl.patch \
             file://0004-Fix-arbitrary-command-execution-in-ed-style-patches-.patch \
             file://0001-Fix-swapping-fake-lines-in-pch_swap.patch \
             file://CVE-2019-13636.patch \
+            file://0001-Invoke-ed-directly-instead-of-using-the-shell.patch \
 "
 
 SRC_URI[md5sum] = "4c68cee989d83c87b00a3860bcd05600"