An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.
2018-09-11T13:29:00.840
2024-11-21T02:57:23.837
Modified
CVSSv3.0: 5.9 (MEDIUM)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9