100 lines
3.4 KiB
Diff
100 lines
3.4 KiB
Diff
From 19599883ffb6a450d2884f081f8ecf68edbed7ee Mon Sep 17 00:00:00 2001
|
|
From: Jean Delvare <jdelvare@suse.de>
|
|
Date: Thu, 3 May 2018 14:31:55 +0200
|
|
Subject: [PATCH] Don't leak temporary file on failed ed-style patch
|
|
|
|
Now that we write ed-style patches to a temporary file before we
|
|
apply them, we need to ensure that the temporary file is removed
|
|
before we leave, even on fatal error.
|
|
|
|
* src/pch.c (do_ed_script): Use global TMPEDNAME instead of local
|
|
tmpname. Don't unlink the file directly, instead tag it for removal
|
|
at exit time.
|
|
* src/patch.c (cleanup): Unlink TMPEDNAME at exit.
|
|
|
|
This closes bug #53820:
|
|
https://savannah.gnu.org/bugs/index.php?53820
|
|
|
|
Fixes: 123eaff0d5d1 ("Fix arbitrary command execution in ed-style patches (CVE-2018-1000156)")
|
|
---
|
|
src/common.h | 2 ++
|
|
src/patch.c | 1 +
|
|
src/pch.c | 11 +++++------
|
|
3 files changed, 8 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/src/common.h b/src/common.h
|
|
index 904a3f8..53c5e32 100644
|
|
--- a/src/common.h
|
|
+++ b/src/common.h
|
|
@@ -94,10 +94,12 @@ XTERN char const *origsuff;
|
|
XTERN char const * TMPINNAME;
|
|
XTERN char const * TMPOUTNAME;
|
|
XTERN char const * TMPPATNAME;
|
|
+XTERN char const * TMPEDNAME;
|
|
|
|
XTERN bool TMPINNAME_needs_removal;
|
|
XTERN bool TMPOUTNAME_needs_removal;
|
|
XTERN bool TMPPATNAME_needs_removal;
|
|
+XTERN bool TMPEDNAME_needs_removal;
|
|
|
|
#ifdef DEBUGGING
|
|
XTERN int debug;
|
|
diff --git a/src/patch.c b/src/patch.c
|
|
index 3fcaec5..9146597 100644
|
|
--- a/src/patch.c
|
|
+++ b/src/patch.c
|
|
@@ -1999,6 +1999,7 @@ cleanup (void)
|
|
remove_if_needed (TMPINNAME, &TMPINNAME_needs_removal);
|
|
remove_if_needed (TMPOUTNAME, &TMPOUTNAME_needs_removal);
|
|
remove_if_needed (TMPPATNAME, &TMPPATNAME_needs_removal);
|
|
+ remove_if_needed (TMPEDNAME, &TMPEDNAME_needs_removal);
|
|
remove_if_needed (TMPREJNAME, &TMPREJNAME_needs_removal);
|
|
output_files (NULL);
|
|
}
|
|
diff --git a/src/pch.c b/src/pch.c
|
|
index 79a3c99..1bb3153 100644
|
|
--- a/src/pch.c
|
|
+++ b/src/pch.c
|
|
@@ -2396,7 +2396,6 @@ do_ed_script (char const *inname, char const *outname,
|
|
file_offset beginning_of_this_line;
|
|
size_t chars_read;
|
|
FILE *tmpfp = 0;
|
|
- char const *tmpname;
|
|
int tmpfd;
|
|
pid_t pid;
|
|
|
|
@@ -2411,12 +2410,13 @@ do_ed_script (char const *inname, char const *outname,
|
|
invalid commands and treats the next line as a new command, which
|
|
can lead to arbitrary command execution. */
|
|
|
|
- tmpfd = make_tempfile (&tmpname, 'e', NULL, O_RDWR | O_BINARY, 0);
|
|
+ tmpfd = make_tempfile (&TMPEDNAME, 'e', NULL, O_RDWR | O_BINARY, 0);
|
|
if (tmpfd == -1)
|
|
- pfatal ("Can't create temporary file %s", quotearg (tmpname));
|
|
+ pfatal ("Can't create temporary file %s", quotearg (TMPEDNAME));
|
|
+ TMPEDNAME_needs_removal = true;
|
|
tmpfp = fdopen (tmpfd, "w+b");
|
|
if (! tmpfp)
|
|
- pfatal ("Can't open stream for file %s", quotearg (tmpname));
|
|
+ pfatal ("Can't open stream for file %s", quotearg (TMPEDNAME));
|
|
}
|
|
|
|
for (;;) {
|
|
@@ -2457,7 +2457,7 @@ do_ed_script (char const *inname, char const *outname,
|
|
write_fatal ();
|
|
|
|
if (lseek (tmpfd, 0, SEEK_SET) == -1)
|
|
- pfatal ("Can't rewind to the beginning of file %s", quotearg (tmpname));
|
|
+ pfatal ("Can't rewind to the beginning of file %s", quotearg (TMPEDNAME));
|
|
|
|
if (inerrno != ENOENT)
|
|
{
|
|
@@ -2484,7 +2484,6 @@ do_ed_script (char const *inname, char const *outname,
|
|
pfatal ("Failed to duplicate standard input");
|
|
|
|
fclose (tmpfp);
|
|
- safe_unlink (tmpname);
|
|
|
|
if (ofp)
|
|
{
|