Version bump and libelf directory traversal fix from upstream #534000 by Agostino Sarubbo.

(Portage version: 2.2.15/cvs/Linux x86_64, signed Manifest commit with key D2E96200)

1 files changed, 51 insertions, 0 deletions

diff --git a/dev-libs/elfutils/files/elfutils-0.161-libelf-dir-traversal.patch b/dev-libs/elfutils/files/elfutils-0.161-libelf-dir-traversal.patch
new file mode 100644
index 000000000000..84a28c71d234
--- /dev/null
+++ b/dev-libs/elfutils/files/elfutils-0.161-libelf-dir-traversal.patch
@@ -0,0 +1,51 @@
+https://bugs.gentoo.org/534000
+
+From 147018e729e7c22eeabf15b82d26e4bf68a0d18e Mon Sep 17 00:00:00 2001
+From: Alexander Cherepanov <cherepan@mccme.ru>
+Date: Sun, 28 Dec 2014 19:57:19 +0300
+Subject: [PATCH] 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@mccme.ru>
+---
+ libelf/ChangeLog   | 5 +++++
+ libelf/elf_begin.c | 5 +----
+ 2 files changed, 6 insertions(+), 4 deletions(-)
+
+2014-12-28  Alexander Cherepanov  <cherepan@mccme.ru>
+
+	* elf_begin.c (read_long_names): Don't miss '/' right after
+	another '/'. Fixes a dir traversal vuln in ar extraction.
+
+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.  */
+-- 
+2.2.1
+