read_formatted_entries in dwarf2.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29, does not properly validate the format count, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted ELF file, related to concat_filename.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Binutils | Gnu | 2.29 (including) | 2.29 (including) |
| Binutils | Ubuntu | artful | * |
| Binutils | Ubuntu | trusty | * |
| Binutils | Ubuntu | upstream | * |
| Binutils | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.securityfocus.com/bid/101611
- https://blogs.gentoo.org/ago/2017/10/03/binutils-null-pointer-dereference-in-concat_filename-dwarf2-c/
- https://security.gentoo.org/glsa/201801-01
- https://sourceware.org/bugzilla/show_bug.cgi?id=22200
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git%3Bh=c361faae8d964db951b7100cada4dcdc983df1bf
- http://www.securityfocus.com/bid/101611
- https://blogs.gentoo.org/ago/2017/10/03/binutils-null-pointer-dereference-in-concat_filename-dwarf2-c/
- https://security.gentoo.org/glsa/201801-01
- https://sourceware.org/bugzilla/show_bug.cgi?id=22200
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git%3Bh=c361faae8d964db951b7100cada4dcdc983df1bf