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fix traversal vulnerability GHSA-pxfv-7rr3-2qjg:

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the /.cpr endpoint allowed full access to server filesystem,
unless mitigated by prisonparty
This commit is contained in:
ed 2023-07-14 15:55:49 +00:00
parent 8f59afb159
commit 043e3c7dd6
1 changed files with 9 additions and 1 deletions
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10
copyparty/httpcli.py
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@ -42,6 +42,7 @@ from .util import (
Pebkac,
UnrecvEOF,
alltrace,
absreal,
atomic_move,
exclude_dotfiles,
fsenc,
@ -779,7 +780,14 @@ class HttpCli(object):
self.reply(b"", 301, headers=h)
return True
static_path = os.path.join(self.E.mod, "web/", self.vpath[5:])
path_base = os.path.join(self.E.mod, "web")
static_path = absreal(os.path.join(path_base, self.vpath[5:]))
if not static_path.startswith(path_base):
t = "attempted path traversal [{}] => [{}]"
self.log(t.format(self.vpath, static_path), 1)
self.tx_404()
return False
return self.tx_file(static_path)
if "cf_challenge" in self.uparam: