From ac4af583bd59f6631671ad4abf985799ce4a53d9 Mon Sep 17 00:00:00 2001 From: rguenth Date: Thu, 25 Jul 2019 10:46:54 +0000 Subject: [PATCH 37/39] CVE-2019-14250: Check zero value in simple_object_elf_match 2019-07-25 Richard Biener PR lto/90924 Backport from mainline 2019-07-12 Ren Kimura * simple-object-elf.c (simple_object_elf_match): Check zero value shstrndx. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-9-branch@273793 138bc75d-0d04-0410-961f-82ee72b054a4 Upstream-Status: Backport Affectes: < 9.2 CVE: CVE-2019-14250 Dropped changelog Signed-off-by: Armin Kuster --- libiberty/simple-object-elf.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libiberty/simple-object-elf.c b/libiberty/simple-object-elf.c index 3d49f339631..c00cebdb6c7 100644 --- a/libiberty/simple-object-elf.c +++ b/libiberty/simple-object-elf.c @@ -557,6 +557,14 @@ simple_object_elf_match (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN], return NULL; } + if (eor->shstrndx == 0) + { + *errmsg = "invalid ELF shstrndx == 0"; + *err = 0; + XDELETE (eor); + return NULL; + } + return (void *) eor; } -- 2.25.1