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Fix a potential NULL pointer derefence when parsing corrupt ELF symbol version information. (#2243769)

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This commit is contained in:
Nick Clifton 2023-10-13 12:44:52 +01:00
parent d294fe2ca4
commit c2d4243912
2 changed files with 38 additions and 1 deletions
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29
binutils-handle-corrupt-version-info.patch Normal file
View File

@ -0,0 +1,29 @@
--- binutils.orig/bfd/elf.c 2023-10-13 11:38:25.159530287 +0100
+++ binutils-2.41/bfd/elf.c 2023-10-13 11:41:23.290898228 +0100
@@ -9479,6 +9479,8 @@ _bfd_elf_slurp_version_tables (bfd *abfd
if (elf_use_dt_symtab_p (abfd))
iverneed->vn_filename
= elf_tdata (abfd)->dt_strtab + iverneed->vn_file;
+ else if (hdr == NULL)
+ goto error_return_bad_verref;
else
iverneed->vn_filename
= bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
@@ -9516,6 +9518,8 @@ _bfd_elf_slurp_version_tables (bfd *abfd
if (elf_use_dt_symtab_p (abfd))
ivernaux->vna_nodename
= elf_tdata (abfd)->dt_strtab + ivernaux->vna_name;
+ else if (hdr == NULL)
+ goto error_return_bad_verref;
else
ivernaux->vna_nodename
= bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
@@ -9546,7 +9550,7 @@ _bfd_elf_slurp_version_tables (bfd *abfd
iverneed->vn_nextref = NULL;
if (iverneed->vn_next == 0)
break;
- if (i + 1 < hdr->sh_info)
+ if (hdr != NULL && (i + 1 < hdr->sh_info))
iverneed->vn_nextref = iverneed + 1;
if (iverneed->vn_next

10
binutils.spec
View File

@ -2,7 +2,7 @@
Summary: A GNU collection of binary utilities
Name: binutils%{?_with_debug:-debug}
Version: 2.41
Release: 6%{?dist}
Release: 7%{?dist}
License: GPL-3.0-or-later AND (GPL-3.0-or-later WITH Bison-exception-2.2) AND (LGPL-2.0-or-later WITH GCC-exception-2.0) AND BSD-3-Clause AND GFDL-1.3-or-later AND GPL-2.0-or-later LGPL-2.1-or-later AND LGPL-2.0-or-later
URL: https://sourceware.org/binutils
@ -256,6 +256,11 @@ Patch17: binutils-riscv-testsuite-fixes.patch
# Lifetime: Fixed in 2.42
Patch18: binutils-gold-powerpc.patch
# Purpose: Fix a potential NULL pointer dereference when parsing corrupt
# ELF symbol version information.
# Lifetime: Fixed in 2.42
Patch19: binutils-handle-corrupt-version-info.patch
#----------------------------------------------------------------------------
Provides: bundled(libiberty)
@ -1255,6 +1260,9 @@ exit 0
#----------------------------------------------------------------------------
%changelog
* Fri Oct 13 2023 Nick Clifton <nickc@redhat.com> - 2.41-7
- Fix a potential NULL pointer derefence when parsing corrupt ELF symbol version information. (#2243769)
* Thu Oct 12 2023 Nick Clifton <nickc@redhat.com> - 2.41-6
- Enable warnings about executable stacks by default.