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commit daae68f4f372e0618d6b9c64ec0f1f74eae6ab3d
Author: Nick Clifton <nickc@redhat.com>
Date: Mon Dec 5 12:25:34 2016 +0000
Fix seg-fault in linker parsing a corrupt input file.
PR ld/20924
(aout_link_add_symbols): Fix off by one error checking for
overflow of string offset.
Upstream-Status: Backport
CVE: CVE-2017-7301
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Index: git/bfd/ChangeLog
===================================================================
--- git.orig/bfd/ChangeLog 2017-09-04 15:42:15.244812577 +0530
+++ git/bfd/ChangeLog 2017-09-04 15:51:36.573466525 +0530
@@ -120,6 +120,10 @@
* peicode.h (pe_ILF_object_p): Use strnlen to avoid running over
the end of the string buffer.
+ PR ld/20924
+ (aout_link_add_symbols): Fix off by one error checking for
+ overflow of string offset.
+
2016-12-01 Nick Clifton <nickc@redhat.com>
PR binutils/20891
Index: git/bfd/aoutx.h
===================================================================
--- git.orig/bfd/aoutx.h 2017-09-04 15:42:15.244812577 +0530
+++ git/bfd/aoutx.h 2017-09-04 15:49:36.500479341 +0530
@@ -3091,7 +3091,7 @@
BFD_ASSERT (p + 1 < pend);
++p;
/* PR 19629: Corrupt binaries can contain illegal string offsets. */
- if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
+ if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
return FALSE;
string = strings + GET_WORD (abfd, p->e_strx);
section = bfd_ind_section_ptr;
@@ -3127,7 +3127,7 @@
++p;
string = name;
/* PR 19629: Corrupt binaries can contain illegal string offsets. */
- if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
+ if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
return FALSE;
name = strings + GET_WORD (abfd, p->e_strx);
section = bfd_und_section_ptr;
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