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| author | Alan Modra <amodra@gmail.com> | 2018-09-20 18:23:17 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2018-09-20 20:20:03 +0930 |
| commit | cf93e9c2cf8f8b2566f8fc86e961592b51b5980d (patch) | |
| tree | 470549e70e4179473b9c479d7b8c42fe58923618 /bfd/peXXigen.c | |
| parent | 4206c05ea1542c413a4a361c29cbbd206861946c (diff) | |
| download | gdb-cf93e9c2cf8f8b2566f8fc86e961592b51b5980d.zip gdb-cf93e9c2cf8f8b2566f8fc86e961592b51b5980d.tar.gz gdb-cf93e9c2cf8f8b2566f8fc86e961592b51b5980d.tar.bz2 | |
PR23685, buffer overflow
PR 23685
* peXXigen.c (pe_print_edata): Correct export address table
overflow checks. Check dataoff against section size too.
Diffstat (limited to 'bfd/peXXigen.c')
| -rw-r--r-- | bfd/peXXigen.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c index 598f2ca..1645ef4 100644 --- a/bfd/peXXigen.c +++ b/bfd/peXXigen.c @@ -1661,7 +1661,8 @@ pe_print_edata (bfd * abfd, void * vfile) dataoff = addr - section->vma; datasize = extra->DataDirectory[PE_EXPORT_TABLE].Size; - if (datasize > section->size - dataoff) + if (dataoff > section->size + || datasize > section->size - dataoff) { fprintf (file, _("\nThere is an export table in %s, but it does not fit into that section\n"), @@ -1778,11 +1779,11 @@ pe_print_edata (bfd * abfd, void * vfile) edt.base); /* PR 17512: Handle corrupt PE binaries. */ - if (edt.eat_addr + (edt.num_functions * 4) - adj >= datasize + /* PR 17512 file: 140-165018-0.004. */ + if (edt.eat_addr - adj >= datasize /* PR 17512: file: 092b1829 */ - || (edt.num_functions * 4) < edt.num_functions - /* PR 17512 file: 140-165018-0.004. */ - || data + edt.eat_addr - adj < data) + || (edt.num_functions + 1) * 4 < edt.num_functions + || edt.eat_addr - adj + (edt.num_functions + 1) * 4 > datasize) fprintf (file, _("\tInvalid Export Address Table rva (0x%lx) or entry count (0x%lx)\n"), (long) edt.eat_addr, (long) edt.num_functions); |