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Accepting request 230407 from home:jones_tony:branches:Base:System

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OBS-URL: https://build.opensuse.org/request/show/230407
OBS-URL: https://build.opensuse.org/package/show/Base:System/elfutils?expand=0&rev=58
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Tony Jones 2014-04-16 22:27:28 +00:00 committed by Git OBS Bridge
parent 5875dc3fad
commit 43787a2593
3 changed files with 45 additions and 1 deletions
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38
elfutils-check-for-overflow-before-calling-malloc-to-uncompress-data.patch Normal file
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@ -0,0 +1,38 @@
From: Mark Wielaard <mjw@redhat.com>
Subject: Check for overflow before calling malloc to uncompress data.
Date: Wed Apr 9 11:33:23 2014 +0200
Git-commit: 7f1eec317db79627b473c5b149a22a1b20d1f68f
References: CVE-2014-0172, bnc#872785
Signed-off-by: Tony Jones <tonyj@suse.de>
CVE-2014-0172 Check for overflow before calling malloc to uncompress data.
https://bugzilla.redhat.com/show_bug.cgi?id=1085663
Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/libdw/dwarf_begin_elf.c b/libdw/dwarf_begin_elf.c
index 79daeac..34ea373 100644
--- a/libdw/dwarf_begin_elf.c
+++ b/libdw/dwarf_begin_elf.c
@@ -1,5 +1,5 @@
/* Create descriptor from ELF descriptor for processing file.
- Copyright (C) 2002-2011 Red Hat, Inc.
+ Copyright (C) 2002-2011, 2014 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -282,6 +282,12 @@ check_section (Dwarf *result, GElf_Ehdr *ehdr, Elf_Scn *scn, bool inscngrp)
memcpy (&size, data->d_buf + 4, sizeof size);
size = be64toh (size);
+ /* Check for unsigned overflow so malloc always allocated
+ enough memory for both the Elf_Data header and the
+ uncompressed section data. */
+ if (unlikely (sizeof (Elf_Data) + size < size))
+ break;
+
Elf_Data *zdata = malloc (sizeof (Elf_Data) + size);
if (unlikely (zdata == NULL))
break;

5
elfutils.changes
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@ -1,3 +1,8 @@
-------------------------------------------------------------------
Tue Apr 15 18:56:25 UTC 2014 - tonyj@suse.com
- Fix integer overflow in check_section (CVE-2014-0172, bnc#872785)
-------------------------------------------------------------------
Sat Mar 22 17:19:48 UTC 2014 - jengelh@inai.de

3
elfutils.spec
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@ -34,6 +34,7 @@ Patch5: elfutils-uninitialized.diff
Patch6: elfutils-0.137-dwarf-header-check-fix.diff
Patch7: elfutils-0.148-dont-crash.diff
Patch8: elfutils-revert-portability-scanf.patch
Patch9: elfutils-check-for-overflow-before-calling-malloc-to-uncompress-data.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-build
BuildRequires: bison
BuildRequires: flex
@ -144,6 +145,7 @@ to develop applications that require these.
%patch6 -p1
%patch7 -p1
%patch8 -p1 -R
%patch9 -p1
%build
# Change DATE/TIME macros to use last change time of elfutils.changes
@ -213,7 +215,6 @@ ls -lR $RPM_BUILD_ROOT%{_libdir}/libelf*
%defattr(-,root,root)
%{_libdir}/libelf.so
%{_libdir}/libelf.a
#%{_libdir}/libelf_pic.a
%{_includedir}/libelf.h
%{_includedir}/gelf.h
%{_includedir}/nlist.h