In Wireshark 2.6.0, 2.4.0 to 2.4.6, and 2.2.0 to 2.2.14, the DNS dissector could crash. This was addressed in epan/dissectors/packet-dns.c by avoiding a NULL pointer dereference for an empty name in an SRV record.
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 |
|---|---|---|---|
| Wireshark | Wireshark | 2.2.0 (including) | 2.2.14 (including) |
| Wireshark | Wireshark | 2.4.0 (including) | 2.4.6 (including) |
| Wireshark | Wireshark | 2.6.0 (including) | 2.6.0 (including) |
| Wireshark | Ubuntu | artful | * |
| Wireshark | Ubuntu | bionic | * |
| Wireshark | Ubuntu | trusty | * |
| Wireshark | Ubuntu | xenial | * |