[arch-commits] Commit in lib32-elfutils/trunk (CVE-2014-9447.patch PKGBUILD)

[Laurent Carlier]

    Date: Monday, March 2, 2015 @ 22:01:29
  Author: lcarlier
Revision: 128583

upgpkg: lib32-elfutils 0.161-1

fix FS#44019 - CVE-2014-9447

Added:
  lib32-elfutils/trunk/CVE-2014-9447.patch
Modified:
  lib32-elfutils/trunk/PKGBUILD

---------------------+
 CVE-2014-9447.patch |   53 ++++++++++++++++++++++++++++++++++++++++++++++++++
 PKGBUILD            |    7 ++++--
 2 files changed, 58 insertions(+), 2 deletions(-)

Added: CVE-2014-9447.patch
===================================================================
--- CVE-2014-9447.patch	                        (rev 0)
+++ CVE-2014-9447.patch	2015-03-02 21:01:29 UTC (rev 128583)
@@ -0,0 +1,53 @@
+From 147018e729e7c22eeabf15b82d26e4bf68a0d18e Mon Sep 17 00:00:00 2001
+From: Alexander Cherepanov <cherepan at mccme.ru>
+Date: Sun, 28 Dec 2014 19:57:19 +0300
+Subject: libelf: Fix dir traversal vuln in ar extraction.
+
+read_long_names terminates names at the first '/' found but then skips
+one character without checking (it's supposed to be '\n'). Hence the
+next name could start with any character including '/'. This leads to
+a directory traversal vulnerability at the time the contents of the
+archive is extracted.
+
+The danger is mitigated by the fact that only one '/' is possible in a
+resulting filename and only in the leading position. Hence only files
+in the root directory can be written via this vuln and only when ar is
+executed as root.
+
+The fix for the vuln is to not skip any characters while looking
+for '/'.
+
+Signed-off-by: Alexander Cherepanov <cherepan at mccme.ru>
+
+diff --git a/libelf/ChangeLog b/libelf/ChangeLog
+index 3b88d03..447c354 100644
+--- a/libelf/ChangeLog
++++ b/libelf/ChangeLog
+@@ -1,3 +1,8 @@
++2014-12-28  Alexander Cherepanov  <cherepan at mccme.ru>
++
++	* elf_begin.c (read_long_names): Don't miss '/' right after
++	another '/'. Fixes a dir traversal vuln in ar extraction.
++
+ 2014-12-18  Ulrich Drepper  <drepper at gmail.com>
+ 
+ 	* Makefile.am: Suppress output of textrel_check command.
+diff --git a/libelf/elf_begin.c b/libelf/elf_begin.c
+index 30abe0b..cd3756c 100644
+--- a/libelf/elf_begin.c
++++ b/libelf/elf_begin.c
+@@ -749,10 +749,7 @@ read_long_names (Elf *elf)
+ 	    }
+ 
+ 	  /* NUL-terminate the string.  */
+-	  *runp = '\0';
+-
+-	  /* Skip the NUL byte and the \012.  */
+-	  runp += 2;
++	  *runp++ = '\0';
+ 
+ 	  /* A sanity check.  Somebody might have generated invalid
+ 	     archive.  */
+-- 
+cgit v0.10.2
+

Modified: PKGBUILD
===================================================================
--- PKGBUILD	2015-03-02 20:28:31 UTC (rev 128582)
+++ PKGBUILD	2015-03-02 21:01:29 UTC (rev 128583)
@@ -13,11 +13,13 @@
 depends=('lib32-bzip2' 'lib32-zlib' 'elfutils')
 makedepends=('gcc-multilib')
 source=(https://fedorahosted.org/releases/e/l/elfutils/${pkgver}/elfutils-${pkgver}.tar.bz2{,.sig}
-        0001-tests-Make-deleted-and-vdsosyms-testcases-work-with-.patch)
+        0001-tests-Make-deleted-and-vdsosyms-testcases-work-with-.patch
+        CVE-2014-9447.patch)
 options=('staticlibs')
 sha1sums=('85d48e18359c51e843c49b1894b2f54b85e88ae2'
           'SKIP'
-          '86947fb8d0f51a65e19142350925f428ad0c7cb1')
+          '86947fb8d0f51a65e19142350925f428ad0c7cb1'
+          'd3e0e8275695fcc6347b8730bd1eb141a022f756')
 validpgpkeys=('47CC0331081B8BC6D0FD4DA08370665B57816A6A') # Mark J. Wielaard <mark at klomp.org>
 
 prepare() {
@@ -25,6 +27,7 @@
 
   # https://lists.fedorahosted.org/pipermail/elfutils-devel/2015-January/004541.html
   patch -p1 < "$srcdir"/0001-tests-Make-deleted-and-vdsosyms-testcases-work-with-.patch
+  patch -p1 < "$srcdir"/CVE-2014-9447.patch
 }
 
 build() {