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A buffer overflow vulnerability exists in GNU Binutils’ objdump utility when processing tekhex format files. The vulnerability occurs in the Binary File Descriptor (BFD) library’s tekhex parser during format identification. Specifically, the issue manifests when attempting to read 8 bytes at an address that precedes the global variable ‘_bfd_std_section’, resulting in an out-of-bounds read. Backport a patch from upstream to fix CVE-2024-53589. Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=e0323071916878e0634a6e24d8250e4faff67e88] (From OE-Core rev: 15635eb807ea1cbf0fd04e0cbe9cf169df107a05) Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
93 lines
2.8 KiB
Diff
93 lines
2.8 KiB
Diff
Author: Alan Modra <amodra@gmail.com>
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Date: Mon Nov 11 10:24:09 2024 +1030
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Re: tekhex object file output fixes
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Commit 8b5a212495 supported *ABS* symbols by allowing "section" to be
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bfd_abs_section, but bfd_abs_section needs to be treated specially.
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In particular, bfd_get_next_section_by_name (.., bfd_abs_section_ptr)
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is invalid.
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PR 32347
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* tekhex.c (first_phase): Guard against modification of
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_bfd_std_section[] entries.
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Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=e0323071916878e0634a6e24d8250e4faff67e88]
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CVE: CVE-2024-53589
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Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
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diff --git a/bfd/tekhex.c b/bfd/tekhex.c
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index aea2ebb23df..b305c1f96f1 100644
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--- a/bfd/tekhex.c
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+++ b/bfd/tekhex.c
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@@ -361,6 +361,7 @@ first_phase (bfd *abfd, int type, char *src, char * src_end)
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{
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asection *section, *alt_section;
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unsigned int len;
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+ bfd_vma addr;
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bfd_vma val;
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char sym[17]; /* A symbol can only be 16chars long. */
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@@ -368,20 +369,16 @@ first_phase (bfd *abfd, int type, char *src, char * src_end)
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{
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case '6':
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/* Data record - read it and store it. */
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- {
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- bfd_vma addr;
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-
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- if (!getvalue (&src, &addr, src_end))
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- return false;
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-
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- while (*src && src < src_end - 1)
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- {
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- insert_byte (abfd, HEX (src), addr);
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- src += 2;
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- addr++;
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- }
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- return true;
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- }
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+ if (!getvalue (&src, &addr, src_end))
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+ return false;
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+
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+ while (*src && src < src_end - 1)
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+ {
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+ insert_byte (abfd, HEX (src), addr);
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+ src += 2;
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+ addr++;
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+ }
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+ return true;
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case '3':
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/* Symbol record, read the segment. */
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@@ -406,13 +403,16 @@ first_phase (bfd *abfd, int type, char *src, char * src_end)
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{
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case '1': /* Section range. */
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src++;
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- if (!getvalue (&src, §ion->vma, src_end))
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+ if (!getvalue (&src, &addr, src_end))
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return false;
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if (!getvalue (&src, &val, src_end))
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return false;
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- if (val < section->vma)
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- val = section->vma;
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- section->size = val - section->vma;
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+ if (bfd_is_const_section (section))
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+ break;
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+ section->vma = addr;
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+ if (val < addr)
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+ val = addr;
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+ section->size = val - addr;
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/* PR 17512: file: objdump-s-endless-loop.tekhex.
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Check for overlarge section sizes. */
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if (section->size & 0x80000000)
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@@ -455,6 +455,8 @@ first_phase (bfd *abfd, int type, char *src, char * src_end)
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new_symbol->symbol.flags = BSF_LOCAL;
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if (stype == '2' || stype == '6')
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new_symbol->symbol.section = bfd_abs_section_ptr;
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+ else if (bfd_is_const_section (section))
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+ ;
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else if (stype == '3' || stype == '7')
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{
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if ((section->flags & SEC_DATA) == 0)
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