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951aea1f7b
Source: git://sourceware.org/git/binutils-gdb.git
MR: 74192
Type: Security Fix
Disposition: Backport from binutils-2_28-branch
ChangeID: 9a4c249becded1b479c0b9e9f175aebb80294317
Description:
Fix seg-fault in strip when copying a corrupt binary.
PR binutils/20931
* elf.c (copy_special_section_fields): Check for an invalid
sh_link field before attempting to follow it.
Affects: <= 2.28
Author: Nick Clifton <nickc@redhat.com>
(From OE-Core rev: fcadfc35ebe90d3f0f3aa0db8caeddb5c07c3120)
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Reviewed-by: Armin Kuster <akuster@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>
54 lines
1.8 KiB
Diff
54 lines
1.8 KiB
Diff
commit 4f3ca05b487e9755018b4c9a053a2e6c35d8a7df
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Author: Nick Clifton <nickc@redhat.com>
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Date: Tue Dec 6 16:53:57 2016 +0000
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Fix seg-fault in strip when copying a corrupt binary.
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PR binutils/20931
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* elf.c (copy_special_section_fields): Check for an invalid
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sh_link field before attempting to follow it.
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Upstream-Status: Backport
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CVE: CVE-2017-7304
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Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
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Index: git/bfd/ChangeLog
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===================================================================
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--- git.orig/bfd/ChangeLog 2017-09-04 16:13:03.512095249 +0530
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+++ git/bfd/ChangeLog 2017-09-04 16:16:25.173745111 +0530
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@@ -114,6 +114,12 @@
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(bfd_elf_final_link): Only initialize the extended symbol index
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section if there are extended symbol tables to list.
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+ 2016-12-06 Nick Clifton <nickc@redhat.com>
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+
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+ PR binutils/20931
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+ * elf.c (copy_special_section_fields): Check for an invalid
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+ sh_link field before attempting to follow it.
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+
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2016-12-05 Nick Clifton <nickc@redhat.com>
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PR binutils/20905
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Index: git/bfd/elf.c
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===================================================================
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--- git.orig/bfd/elf.c 2017-09-04 16:13:03.512095249 +0530
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+++ git/bfd/elf.c 2017-09-04 16:15:38.257359045 +0530
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@@ -1324,6 +1324,16 @@
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in the input bfd. */
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if (iheader->sh_link != SHN_UNDEF)
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{
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+ /* See PR 20931 for a reproducer. */
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+ if (iheader->sh_link >= elf_numsections (ibfd))
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+ {
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+ (* _bfd_error_handler)
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+ /* xgettext:c-format */
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+ (_("%B: Invalid sh_link field (%d) in section number %d"),
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+ ibfd, iheader->sh_link, secnum);
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+ return FALSE;
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+ }
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+
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sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
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if (sh_link != SHN_UNDEF)
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{
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