Browse Source

patch: apply upstream patch for CVE-2019-13638

GNU patch through 2.7.6 is vulnerable to OS shell command injection that
can be exploited by opening a crafted patch file that contains an ed style
diff payload with shell metacharacters. The ed editor does not need to be
present on the vulnerable system. This is different from CVE-2018-1000156.

https://nvd.nist.gov/vuln/detail/CVE-2019-13638

Signed-off-by: Russell Senior <russell@personaltelco.net>
lilik-openwrt-22.03
Russell Senior 5 years ago
parent
commit
b82198ff47
2 changed files with 39 additions and 1 deletions
  1. +1
    -1
      devel/patch/Makefile
  2. +38
    -0
      devel/patch/patches/060-CVE-2019-13638.patch

+ 1
- 1
devel/patch/Makefile View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=patch
PKG_VERSION:=2.7.6
PKG_RELEASE:=4
PKG_RELEASE:=5
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=@GNU/patch


+ 38
- 0
devel/patch/patches/060-CVE-2019-13638.patch View File

@ -0,0 +1,38 @@
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: 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.
---
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
--
cgit v1.0-41-gc330

Loading…
Cancel
Save