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elfutils: Security fixes CVE-2019-7146,7149,7150

Browse Source 
Source: http://sourceware.org/git/elfutils.git
MR: 97563, 97568, 97558
Type: Security Fix
Disposition: Backport from http://sourceware.org/git/elfutils.git
ChangeID: 6183c2a25d5e32eec1846a428dd165e1de659f24
Description:

Affects <= 0.175

Fixes:
CVE-2019-7146
CVE-2019-7149
CVE-2019-7150

(From OE-Core rev: ac5dca7dc68519b36aa976dfd25d8efa76af74ec)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Armin Kuster
2019-05-28 16:11:08 -07:00
committed by Richard Purdie
parent 2c225a199d
commit cd7f7bf385
5 changed files with 320 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/elfutils/files/CVE-2019-7150.patch
+51
View File
@@ -0,0 +1,51 @@
From da5c5336a1eaf519de246f7d9f0f5585e1d4ac59 Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mark@klomp.org>
Date: Sun, 20 Jan 2019 23:05:56 +0100
Subject: [PATCH] libdwfl: Sanity check partial core file dyn data read.
When reading the dyn data from the core file check if we got everything,
or just part of the data.
https://sourceware.org/bugzilla/show_bug.cgi?id=24103
Signed-off-by: Mark Wielaard <mark@klomp.org>
Upstream-Status: Backport
CVE: CVE-2019-7150
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
libdwfl/ChangeLog | 5 +++++
libdwfl/dwfl_segment_report_module.c | 6 ++++++
2 files changed, 11 insertions(+)
Index: elfutils-0.175/libdwfl/dwfl_segment_report_module.c
===================================================================
--- elfutils-0.175.orig/libdwfl/dwfl_segment_report_module.c
+++ elfutils-0.175/libdwfl/dwfl_segment_report_module.c
@@ -783,6 +783,12 @@ dwfl_segment_report_module (Dwfl *dwfl,
if (dyn_filesz != 0 && dyn_filesz % dyn_entsize == 0
&& ! read_portion (&dyn_data, &dyn_data_size, dyn_vaddr, dyn_filesz))
{
+ /* dyn_data_size will be zero if we got everything from the initial
+ buffer, otherwise it will be the size of the new buffer that
+ could be read. */
+ if (dyn_data_size != 0)
+ dyn_filesz = dyn_data_size;
+
void *dyns = malloc (dyn_filesz);
Elf32_Dyn (*d32)[dyn_filesz / sizeof (Elf32_Dyn)] = dyns;
Elf64_Dyn (*d64)[dyn_filesz / sizeof (Elf64_Dyn)] = dyns;
Index: elfutils-0.175/libdwfl/ChangeLog
===================================================================
--- elfutils-0.175.orig/libdwfl/ChangeLog
+++ elfutils-0.175/libdwfl/ChangeLog
@@ -1,3 +1,8 @@
+2019-01-20 Mark Wielaard <mark@klomp.org>
+
+ * dwfl_segment_report_module.c (dwfl_segment_report_module): Check
+ dyn_filesz vs dyn_data_size after read_portion call.
+
2018-10-20 Mark Wielaard <mark@klomp.org>
* libdwflP.h (__libdw_open_elf): New internal function declaration.