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Jamie Tanna
b017c7548a
When executing commands for `binarySource=docker`, we have two areas
that a command could have shell expansion/injection:
- on the host (when constructing the `bash -l -c`)
- in the container (when running a manager-specific command)
When constructing the host's command, we previously would escape the
`"`, which allows Bash syntax for `${VAR}` and `$(...)` syntax inside
it.
While managers use `quote()` to make the inputs safer, the use of `"`
around that would not provide any protection, and lead to cases where
the `quote()` could be expanded on the host, before `docker run`
executes.
After recent changes to each manager - and removal of `shell: true` -
this doesn't seem to be exploitable, but this hardens it further.
Additionally, we never escaped `\`, so a value containing `\"` produces
a command that `shlex.split` rejects, and the update fails rather than
running.
Instead, we can quote the whole `-c` argument with `quote()`, which
round-trips through both `shlex.split` - the default, no-shell path - and
a real shell.
This removes the `lgtm [js/incomplete-sanitization]` suppression as
we're now correctly sanitising this.
Note this doesn't remove the need for the managers to quote their own
values, as the second area above is still a real shell.
Co-authored-by: Claude Opus 5 <jamie.tanna+claude-code@mend.io>