The hb_buffer_ensure function in hb-buffer.c in HarfBuzz, as used in Pango 1.28.3, Firefox, and other products, does not verify that memory reallocations succeed, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or possibly execute arbitrary code via crafted OpenType font data that triggers use of an incorrect index.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Pango | Gnome | 1.28.3 (including) | 1.28.3 (including) |
| Firefox | Mozilla | * | * |
| Red Hat Enterprise Linux 6 | RedHat | pango-0:1.28.1-3.el6_0.5 | * |
| Pango1.0 | Ubuntu | dapper | * |
| Pango1.0 | Ubuntu | karmic | * |
| Pango1.0 | Ubuntu | lucid | * |
| Pango1.0 | Ubuntu | maverick | * |