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Source: binutils-gbd.git MR: 72742 Type: Security Fix Disposition: Backport from git://sourceware.org/binutils-gdb.git ChangeID: 280f36838862ea67fdcd65b162c1a4835cf924dc Description: Affects: <= 2.28 (From OE-Core rev: 9d5c9ad603947136e23325b123bc37c4b939d783) Signed-off-by: Armin Kuster <akuster@mvista.com> Reviewed-by Jeremy Puhlman <jpuhlman@mvista.com> Signed-off-by: Armin Kuster <akuster@mvista.com> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
73 lines
2.2 KiB
Diff
73 lines
2.2 KiB
Diff
From 75ec1fdbb797a389e4fe4aaf2e15358a070dcc19 Mon Sep 17 00:00:00 2001
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From: Nick Clifton <nickc@redhat.com>
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Date: Mon, 3 Apr 2017 11:13:21 +0100
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Subject: [PATCH] Fix runtime seg-fault in readelf when parsing a corrupt MIPS
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binary.
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PR binutils/21344
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* readelf.c (process_mips_specific): Check for an out of range GOT
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entry before reading the module pointer.
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Upstream-Status: Backport
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CVE: CVE-2017-9039 supporting patch
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VER: <= 2.28
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Signed-off-by: Armin kuster <akuster@mvista.com>
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---
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binutils/ChangeLog | 6 ++++++
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binutils/readelf.c | 26 ++++++++++++++++++--------
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2 files changed, 24 insertions(+), 8 deletions(-)
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Index: git/binutils/readelf.c
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===================================================================
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--- git.orig/binutils/readelf.c
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+++ git/binutils/readelf.c
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@@ -14987,14 +14987,24 @@ process_mips_specific (FILE * file)
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printf (_(" Lazy resolver\n"));
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if (ent == (bfd_vma) -1)
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goto got_print_fail;
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- if (data
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- && (byte_get (data + ent - pltgot, addr_size)
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- >> (addr_size * 8 - 1)) != 0)
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+
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+ if (data)
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{
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- ent = print_mips_got_entry (data, pltgot, ent, data_end);
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- printf (_(" Module pointer (GNU extension)\n"));
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- if (ent == (bfd_vma) -1)
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- goto got_print_fail;
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+ /* PR 21344 */
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+ if (data + ent - pltgot > data_end - addr_size)
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+ {
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+ error (_("Invalid got entry - %#lx - overflows GOT table\n"), ent);
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+ goto got_print_fail;
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+ }
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+
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+ if (byte_get (data + ent - pltgot, addr_size)
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+ >> (addr_size * 8 - 1) != 0)
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+ {
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+ ent = print_mips_got_entry (data, pltgot, ent, data_end);
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+ printf (_(" Module pointer (GNU extension)\n"));
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+ if (ent == (bfd_vma) -1)
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+ goto got_print_fail;
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+ }
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}
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printf ("\n");
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Index: git/bfd/ChangeLog
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===================================================================
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--- git.orig/bfd/ChangeLog
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+++ git/bfd/ChangeLog
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@@ -1,5 +1,11 @@
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2017-04-03 Nick Clifton <nickc@redhat.com>
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+ PR binutils/21344
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+ * readelf.c (process_mips_specific): Check for an out of range GOT
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+ entry before reading the module pointer.
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+
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+2017-04-03 Nick Clifton <nickc@redhat.com>
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+
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PR binutils/21343
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* readelf.c (get_unwind_section_word): Fix snafu checking for
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invalid word offsets in ARM unwind information.
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