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Local storage should not store files as executable (#22162) (#22163)

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Backport #22162

The PR #21198 introduced a probable security vulnerability which
resulted in making all storage files be marked as executable.

This PR ensures that these are forcibly marked as non-executable.

Fix #22161

Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath
2022-12-18 23:12:25 +00:00
committed by GitHub
parent e88218f4be
commit 56bded9d8d
1 changed files with 2 additions and 1 deletions
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3
modules/storage/local.go
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@@ -103,7 +103,8 @@ func (l *LocalStorage) Save(path string, r io.Reader, size int64) (int64, error)
return 0, err
}
// Golang's tmp file (os.CreateTemp) always have 0o600 mode, so we need to change the file to follow the umask (as what Create/MkDir does)
if err := util.ApplyUmask(p, os.ModePerm); err != nil {
// but we don't want to make these files executable - so ensure that we mask out the executable bits
if err := util.ApplyUmask(p, os.ModePerm&0o666); err != nil {
return 0, err
}