binutils: fix CVE-2017-7209 in readelf
CVE: CVE-2017-7209 [BZ 21135] -- https://sourceware.org/bugzilla/show_bug.cgi?id=21135 PR binutils/21135: Fix invalid read of section contents whilst processing a corrupt binary. (From OE-Core rev: 2df642ca0a1e4a4e6616729018cf32d2108cabb2) (From OE-Core rev: b262000162cb4e18421dd85bf5216c9fa3bdbf15) Signed-off-by: Yuanjie Huang <yuanjie.huang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -41,6 +41,7 @@ SRC_URI = "\
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file://0018-PR-21409-segfault-in-_bfd_dwarf2_find_nearest_line.patch \
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file://CVE-2017-6969.patch \
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file://CVE-2017-6969_2.patch \
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file://CVE-2017-7209.patch \
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"
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S = "${WORKDIR}/git"
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@ -0,0 +1,62 @@
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From b2706ceadac7239e7b02d43f05100fc6538b0d65 Mon Sep 17 00:00:00 2001
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From: Nick Clifton <nickc@redhat.com>
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Date: Mon, 13 Feb 2017 15:04:37 +0000
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Subject: Fix invalid read of section contents whilst processing a corrupt binary.
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PR binutils/21135
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* readelf.c (dump_section_as_bytes): Handle the case where
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uncompress_section_contents returns false.
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CVE: CVE-2017-7209
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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 | 16 ++++++++++++----
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2 files changed, 18 insertions(+), 4 deletions(-)
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diff --git a/binutils/ChangeLog b/binutils/ChangeLog
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index 53352c1801..cf92744c12 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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+2017-02-13 Nick Clifton <nickc@redhat.com>
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+
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+ PR binutils/21135
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+ * readelf.c (dump_section_as_bytes): Handle the case where
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+ uncompress_section_contents returns false.
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+
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2017-02-20 Nick Clifton <nickc@redhat.com>
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PR binutils/21156
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diff --git a/binutils/readelf.c b/binutils/readelf.c
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index 4960491c5c..f0e7b080e8 100644
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--- a/binutils/readelf.c
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+++ b/binutils/readelf.c
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@@ -12803,10 +12803,18 @@ dump_section_as_bytes (Elf_Internal_Shdr * section,
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new_size -= 12;
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}
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- if (uncompressed_size
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- && uncompress_section_contents (& start, uncompressed_size,
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- & new_size))
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- section_size = new_size;
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+ if (uncompressed_size)
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+ {
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+ if (uncompress_section_contents (& start, uncompressed_size,
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+ & new_size))
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+ section_size = new_size;
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+ else
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+ {
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+ error (_("Unable to decompress section %s\n"),
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+ printable_section_name (section));
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+ return;
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+ }
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+ }
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}
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if (relocate)
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--
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2.11.0
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