The print_frame_inst_bytes function in libdwarf before 20160923 allows remote attackers to cause a denial of service (NULL pointer dereference) via an object file with empty bss-like sections.
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 | 1999-12-14 (including) | 2016-09-23 (excluding) |
| Dwarfutils | Ubuntu | artful | * |
| Dwarfutils | Ubuntu | esm-apps/xenial | * |
| Dwarfutils | Ubuntu | precise | * |
| Dwarfutils | Ubuntu | trusty | * |
| Dwarfutils | Ubuntu | wily | * |
| Dwarfutils | Ubuntu | xenial | * |
| Dwarfutils | Ubuntu | yakkety | * |
| Dwarfutils | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.openwall.com/lists/oss-security/2016/05/24/1
- http://www.openwall.com/lists/oss-security/2016/05/25/1
- https://www.prevanders.net/dwarfbug.html
- http://www.openwall.com/lists/oss-security/2016/05/24/1
- http://www.openwall.com/lists/oss-security/2016/05/25/1
- https://www.prevanders.net/dwarfbug.html