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luci-base: sys: prevent path traversal via sys.init routines

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Filter the init script name parameter through fs.basename() to avoid
invoking paths outside of /etc/init.d/.

Reported-by: Graham R <gr348@cam.ac.uk>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2022-01-19 16:32:52 +01:00
parent 35df2adaf8
commit 8752701b0d
1 changed files with 2 additions and 0 deletions
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2
modules/luci-base/luasrc/sys.lua
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@ -566,6 +566,7 @@ function init.names()
end
function init.index(name)
name = fs.basename(name)
if fs.access(init.dir..name) then
return call("env -i sh -c 'source %s%s enabled; exit ${START:-255}' >/dev/null"
%{ init.dir, name })
@ -573,6 +574,7 @@ function init.index(name)
end
local function init_action(action, name)
name = fs.basename(name)
if fs.access(init.dir..name) then
return call("env -i %s%s %s >/dev/null" %{ init.dir, name, action })
end