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| author | David Kalnischkies <david@kalnischkies.de> | 2016-11-09 19:15:01 +0100 |
|---|---|---|
| committer | David Kalnischkies <david@kalnischkies.de> | 2016-11-09 19:33:33 +0100 |
| commit | 34b491e735ad47c4805e63f3b83a659b8d10262b (patch) | |
| tree | 733fb32936d1fb4a2ec7230c54addb4bcb58e95f /apt-pkg | |
| parent | 2c30cf43f1c4ab96f3eca849d7eb4923ffed40b1 (diff) | |
reset HOME, USER(NAME), TMPDIR & SHELL in DropPrivileges
We can't cleanup the environment like e.g. sudo would do as you usually
want the environment to "leak" into these helpers, but some variables
like HOME should really not have still the value of the root user – it
could confuse the helpers (USER) and HOME isn't accessible anyhow.
Closes: 842877
Diffstat (limited to 'apt-pkg')
| -rw-r--r-- | apt-pkg/contrib/fileutl.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index 6c43bed90..d52e9b360 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -3051,6 +3051,26 @@ bool DropPrivileges() /*{{{*/ return _error->Error("Could restore a uid to root, privilege dropping did not work"); } + if (_config->FindB("APT::Sandbox::ResetEnvironment", true)) + { + setenv("HOME", pw->pw_dir, 1); + setenv("USER", pw->pw_name, 1); + setenv("USERNAME", pw->pw_name, 1); + setenv("LOGNAME", pw->pw_name, 1); + auto const shell = flNotDir(pw->pw_shell); + if (shell == "false" || shell == "nologin") + setenv("SHELL", "/bin/sh", 1); + else + setenv("SHELL", pw->pw_shell, 1); + auto const tmpdir = getenv("TMPDIR"); + if (tmpdir != nullptr) + { + auto const ourtmpdir = GetTempDir(); + if (ourtmpdir != tmpdir) + setenv("TMPDIR", ourtmpdir.c_str(), 1); + } + } + return true; } /*}}}*/ |