The Q.931 dissector in Ethereal before 0.10.0, and Tethereal, allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ethereal | Ethereal | * | 0.10.0 (excluding) |
| Red Hat Enterprise Linux 3 | RedHat | ethereal-0:0.10.0a-0.30E.1 | * |
| Red Hat Linux 9 | RedHat | * |