Missing authorization in illumos ipmgmtd allows local users to change persistent IPMP group membership

Summary

A missing authorization check in the illumos IP management daemon (ipmgmtd) allows a local user to change the persistent IP multipathing (IPMP) configuration. The ipmgmtd door dispatch table in usr/src/cmd/cmd-inet/lib/ipmgmtd/ipmgmt_door.c does not require the solaris.network.interface.config authorization for the IPMGMT_CMD_IPMP_UPDATE command, although its handler, ipmgmt_ipmp_update_handler(), writes to the persistent ipadm configuration when the IPMGMT_PERSIST flag is set. An unprivileged local user can therefore add interfaces to, or remove them from, existing IPMP groups in the stored configuration. The running configuration is not changed; the modification takes effect when the stored configuration is next applied, such as at boot, and may disrupt network connectivity. The flaw has existed since 2021 (illumos-gate commit a73be61a), and affects any illumos distribution prior to illumos-gate commit e8d3efa1.

Timeline

1. Oct 9, 2026, 2:15 PM UTCCVE published
2. Oct 9, 2026, 4:15 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 9, 2026, 4:45 PM UTCRecord last updated

Affected versions

• SUNWcs

  From a73be61a80f7331c35adfa540bcf8f1546ff1e33 · fixed in e8d3efa1c56e5f2b5368600a2baeb7b1d54a07f8

• OmniOS OmniOS

  From r151042 · fixed in r151054; From r151058 · fixed in r151058w; From r151056 · fixed in r151056aw; From r151054 · fixed in r151054bw

References 3