Problem: runtime(vimball): still path traversal attacks possible
Solution: block Windows driver letter paths (Yasuhiro Matsumoto)
The path traversal check in vimball#Vimball() did not reject file
names starting with a Windows drive letter (e.g. "C:/foo"). Backslashes
are normalized to forward slashes earlier, so UNC paths are caught by
the leading-slash check, but absolute drive-letter paths slipped
through and could write outside of g:vimball_home on Windows.
Add a "^\a:" check next to the existing "^/" check, and cover it with
a new test.
closes: #19989
Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
b076c49282
