The rtsol(8) and rtsold(8) programs do not validate the domain search list options provided in router advertisement messages; the option body is passed to resolvconf(8) unmodified.
resolvconf(8) is a shell script which does not validate its input. A lack of quoting meant that shell commands pass as input to resolvconf(8) may be executed.
Exploitability
AV:NAC:LPR:HUI:NScope
S:UImpact
C:HI:HA:H7.2/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HInput Validation