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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>
52 lines
2.0 KiB
Diff
52 lines
2.0 KiB
Diff
From da5c5336a1eaf519de246f7d9f0f5585e1d4ac59 Mon Sep 17 00:00:00 2001
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From: Mark Wielaard <mark@klomp.org>
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Date: Sun, 20 Jan 2019 23:05:56 +0100
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Subject: [PATCH] libdwfl: Sanity check partial core file dyn data read.
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When reading the dyn data from the core file check if we got everything,
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or just part of the data.
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https://sourceware.org/bugzilla/show_bug.cgi?id=24103
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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Upstream-Status: Backport
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CVE: CVE-2019-7150
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Signed-off-by: Armin Kuster <akuster@mvista.com>
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---
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libdwfl/ChangeLog | 5 +++++
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libdwfl/dwfl_segment_report_module.c | 6 ++++++
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2 files changed, 11 insertions(+)
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Index: elfutils-0.175/libdwfl/dwfl_segment_report_module.c
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===================================================================
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--- elfutils-0.175.orig/libdwfl/dwfl_segment_report_module.c
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+++ elfutils-0.175/libdwfl/dwfl_segment_report_module.c
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@@ -783,6 +783,12 @@ dwfl_segment_report_module (Dwfl *dwfl,
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if (dyn_filesz != 0 && dyn_filesz % dyn_entsize == 0
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&& ! read_portion (&dyn_data, &dyn_data_size, dyn_vaddr, dyn_filesz))
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{
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+ /* dyn_data_size will be zero if we got everything from the initial
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+ buffer, otherwise it will be the size of the new buffer that
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+ could be read. */
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+ if (dyn_data_size != 0)
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+ dyn_filesz = dyn_data_size;
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+
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void *dyns = malloc (dyn_filesz);
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Elf32_Dyn (*d32)[dyn_filesz / sizeof (Elf32_Dyn)] = dyns;
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Elf64_Dyn (*d64)[dyn_filesz / sizeof (Elf64_Dyn)] = dyns;
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Index: elfutils-0.175/libdwfl/ChangeLog
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===================================================================
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--- elfutils-0.175.orig/libdwfl/ChangeLog
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+++ elfutils-0.175/libdwfl/ChangeLog
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@@ -1,3 +1,8 @@
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+2019-01-20 Mark Wielaard <mark@klomp.org>
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+
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+ * dwfl_segment_report_module.c (dwfl_segment_report_module): Check
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+ dyn_filesz vs dyn_data_size after read_portion call.
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+
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2018-10-20 Mark Wielaard <mark@klomp.org>
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* libdwflP.h (__libdw_open_elf): New internal function declaration.
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