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cd7f7bf385
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>
53 lines
1.6 KiB
Diff
53 lines
1.6 KiB
Diff
From 012018907ca05eb0ab51d424a596ef38fc87cae1 Mon Sep 17 00:00:00 2001
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From: Mark Wielaard <mark@klomp.org>
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Date: Wed, 16 Jan 2019 11:57:35 +0100
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Subject: [PATCH] libebl: Check GNU property note pr_datasz fits inside note
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description.
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Before printing the data values, make sure pr_datasz doesn't go beyond
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the end of the note description data.
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https://sourceware.org/bugzilla/show_bug.cgi?id=24075
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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-2019-7146 patch #1
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Signed-off-by: Armin Kuster <akuster@mvista.com>
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---
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libebl/ChangeLog | 4 ++++
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libebl/eblobjnote.c | 7 +++++++
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2 files changed, 11 insertions(+)
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Index: elfutils-0.175/libebl/eblobjnote.c
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===================================================================
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--- elfutils-0.175.orig/libebl/eblobjnote.c
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+++ elfutils-0.175/libebl/eblobjnote.c
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@@ -350,6 +350,13 @@ ebl_object_note (Ebl *ebl, uint32_t name
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desc += 8;
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descsz -= 8;
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+ if (prop.pr_datasz > descsz)
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+ {
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+ printf ("BAD property datasz: %" PRId32 "\n",
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+ prop.pr_datasz);
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+ return;
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+ }
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+
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int elfclass = gelf_getclass (ebl->elf);
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char *elfident = elf_getident (ebl->elf, NULL);
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GElf_Ehdr ehdr;
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Index: elfutils-0.175/libebl/ChangeLog
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===================================================================
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--- elfutils-0.175.orig/libebl/ChangeLog
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+++ elfutils-0.175/libebl/ChangeLog
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@@ -1,3 +1,7 @@
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+2019-01-16 Mark Wielaard <mark@klomp.org>
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+
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+ * eblobjnte.c (ebl_object_note): Check pr_datasz isn't too large.
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+
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2018-11-15 Mark Wielaard <mark@klomp.org>
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* eblobjnotetypename.c (ebl_object_note_type_name): Don't update
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