Your Name
44 lines
1.3 KiB
Diff
44 lines
1.3 KiB
Diff
From c22d38baefc5a7a1e1f5cdc9dbb556b1f0ec5c57 Mon Sep 17 00:00:00 2001
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From: Nick Clifton <nickc@redhat.com>
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Date: Thu, 30 Mar 2023 10:10:09 +0100
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Subject: [PATCH] Fix an illegal memory access when an accessing a
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zer0-lengthverdef table.
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PR 30285
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* elf.c (_bfd_elf_slurp_version_tables): Fail if no version definitions are allocated.
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CVE: CVE-2023-1972
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Upstream-Status: Backport
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Signed-off-by: Ross Burton <ross.burton@arm.com>
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---
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bfd/ChangeLog | 6 ++++++
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bfd/elf.c | 5 +++++
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2 files changed, 11 insertions(+)
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diff --git a/bfd/elf.c b/bfd/elf.c
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index 027d0143735..185028cbd97 100644
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--- a/bfd/elf.c
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+++ b/bfd/elf.c
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@@ -9030,6 +9030,9 @@ _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver)
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bfd_set_error (bfd_error_file_too_big);
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goto error_return_verdef;
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}
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+
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+ if (amt == 0)
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+ goto error_return_verdef;
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elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
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if (elf_tdata (abfd)->verdef == NULL)
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goto error_return_verdef;
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@@ -9133,6 +9136,8 @@ _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver)
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bfd_set_error (bfd_error_file_too_big);
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goto error_return;
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}
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+ if (amt == 0)
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+ goto error_return;
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elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
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if (elf_tdata (abfd)->verdef == NULL)
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goto error_return;
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--
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2.34.1
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