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CVE: CVE-2017-6969 [BZ 21156] -- https://sourceware.org/bugzilla/show_bug.cgi?id=21156 PR binutils/21156: Fix illegal memory accesses in readelf when ing a corrupt binary. PR binutils/21156: Fix another memory access error in readelf when parsing a corrupt binary. (From OE-Core rev: 565d4b9432c898e4483f392a91f4b4aaebb4b184) Signed-off-by: Yuanjie Huang <yuanjie.huang@windriver.com> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
From 489246368e2c49a795ad5ecbc8895cbc854292fa Mon Sep 17 00:00:00 2001
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From: Nick Clifton <nickc@redhat.com>
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Date: Fri, 17 Feb 2017 15:59:45 +0000
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Subject: Fix illegal memory accesses in readelf when parsing a corrupt binary.
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PR binutils/21156
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* readelf.c (find_section_in_set): Test for invalid section
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indicies.
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CVE: CVE-2017-6969
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Upstream-Status: Backport [master]
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Signed-off-by: Yuanjie Huang <yuanjie.huang@windriver.com>
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---
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binutils/ChangeLog | 6 ++++++
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binutils/readelf.c | 10 ++++++++--
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2 files changed, 14 insertions(+), 2 deletions(-)
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diff --git a/binutils/ChangeLog b/binutils/ChangeLog
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index a70bdb7a7b..dbf8eb079e 100644
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--- a/binutils/ChangeLog
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+++ b/binutils/ChangeLog
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@@ -1,3 +1,9 @@
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+2017-02-17 Nick Clifton <nickc@redhat.com>
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+
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+ PR binutils/21156
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+ * readelf.c (find_section_in_set): Test for invalid section
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+ indicies.
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+
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2016-08-03 Tristan Gingold <gingold@adacore.com>
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* configure: Regenerate.
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diff --git a/binutils/readelf.c b/binutils/readelf.c
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index d31558c3b4..7f7365dbc5 100644
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--- a/binutils/readelf.c
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+++ b/binutils/readelf.c
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@@ -674,8 +674,14 @@ find_section_in_set (const char * name, unsigned int * set)
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if (set != NULL)
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{
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while ((i = *set++) > 0)
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- if (streq (SECTION_NAME (section_headers + i), name))
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- return section_headers + i;
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+ {
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+ /* See PR 21156 for a reproducer. */
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+ if (i >= elf_header.e_shnum)
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+ continue; /* FIXME: Should we issue an error message ? */
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+
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+ if (streq (SECTION_NAME (section_headers + i), name))
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+ return section_headers + i;
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+ }
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}
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return find_section (name);
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--
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2.11.0
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