handle_ipDefaultTTL in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.8 through 5.9.3 has a NULL Pointer Exception bug that can be used by a remote attacker (who has write access) to cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Net-snmp | Net-snmp | 5.8 (including) | 5.9.3 (including) |
| Red Hat Enterprise Linux 8 | RedHat | net-snmp-1:5.8-27.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | net-snmp-1:5.8-27.el8 | * |
| Red Hat Enterprise Linux 9 | RedHat | net-snmp-1:5.9.1-9.el9 | * |
| Net-snmp | Ubuntu | bionic | * |
| Net-snmp | Ubuntu | esm-infra-legacy/trusty | * |
| Net-snmp | Ubuntu | esm-infra/bionic | * |
| Net-snmp | Ubuntu | esm-infra/focal | * |
| Net-snmp | Ubuntu | esm-infra/xenial | * |
| Net-snmp | Ubuntu | focal | * |
| Net-snmp | Ubuntu | jammy | * |
| Net-snmp | Ubuntu | kinetic | * |
| Net-snmp | Ubuntu | lunar | * |
| Net-snmp | Ubuntu | trusty | * |
| Net-snmp | Ubuntu | trusty/esm | * |
| Net-snmp | Ubuntu | xenial | * |
Potential Mitigations
References
- https://gist.github.com/menglong2234/b7bc13ae1a144f47cc3c95a7ea062428
- https://github.com/net-snmp/net-snmp/issues/474
- https://lists.debian.org/debian-lts-announce/2023/01/msg00010.html
- https://security.netapp.com/advisory/ntap-20230223-0011/
- https://gist.github.com/menglong2234/b7bc13ae1a144f47cc3c95a7ea062428
- https://github.com/net-snmp/net-snmp/issues/474
- https://lists.debian.org/debian-lts-announce/2023/01/msg00010.html
- https://security.netapp.com/advisory/ntap-20230223-0011/