libdwarf before 20201201 allows a dwarf_print_lines.c NULL pointer dereference and application crash via a DWARF5 line-table header that has an invalid FORM for a pathname.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libdwarf | Libdwarf_project | * | 2020-12-01 (excluding) |
| Dwarfutils | Ubuntu | bionic | * |
| Dwarfutils | Ubuntu | focal | * |
| Dwarfutils | Ubuntu | trusty | * |
| Dwarfutils | Ubuntu | upstream | * |
| Dwarfutils | Ubuntu | xenial | * |
Potential Mitigations
References
- http://web.archive.org/web/20190601140703/https://sourceforge.net/projects/libdwarf/
- https://bugzilla.redhat.com/show_bug.cgi?id=2026000
- https://github.com/davea42/libdwarf-code/commit/faf99408e3f9f706fc3809dd400e831f989778d3
- https://www.prevanders.net/dwarfbug.html#DW202010-003
- http://web.archive.org/web/20190601140703/https://sourceforge.net/projects/libdwarf/
- https://bugzilla.redhat.com/show_bug.cgi?id=2026000
- https://github.com/davea42/libdwarf-code/commit/faf99408e3f9f706fc3809dd400e831f989778d3
- https://www.prevanders.net/dwarfbug.html#DW202010-003