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a3f41fb422* sec(server): sanitize user-controlled filenames in Content-Disposition
Playlist export, Subsonic download and public share download built the
Content-Disposition header by interpolating a user-controlled name into a
quoted-string with fmt.Sprintf. A name containing a double quote closes the
string early and the rest is parsed as additional parameters, so a playlist
named `party"; filename="evil.html` yielded
attachment; filename="party"; filename="evil.html.m3u"
letting whoever chose the name decide what the browser saves the download as.
The names come from playlists, album/artist names and media file tags.
Go's net/http already rewrites CR and LF in header values to spaces, so
response splitting was not reachable; parameter injection was.
Add str.ContentDispositionAttachment, which emits a sanitized ASCII-only
quoted `filename` plus an RFC 5987 `filename*` carrying the original UTF-8
name, and use it at all four call sites. The `filename*` parameter also fixes
non-ASCII names, which previously went out raw or were mangled by sanitizing.
Signed-off-by: zapisanchez <zapisanchez@gmail.com>
* fix(server): keep download names intact and sanitize filename*
Rework ContentDispositionAttachment after review. Names with no ASCII
letters now fall back to download.<ext> instead of a bare extension
(東京.mp3 gave filename="mp3"). filename* is built from the same
sanitized name as the ASCII fallback, so path separators, reserved
characters, control and bidi characters, and invalid UTF-8 no longer
reach it. The ASCII fallback transliterates accents and typographic
punctuation (Legião -> Legiao, She’s -> She's) through the existing
sanitize.Accents and str.Clear helpers, keeps leading dots, and only
trims trailing ones. Names are capped at 255 bytes, keeping the
extension.
Pure ASCII names now get only the quoted filename parameter, so the
header for them matches the previous output byte for byte. filename*
is encoded with mime.FormatMediaType instead of a hand-written RFC 5987
encoder. Adds tests for the M3U export and Subsonic download headers.
* fix(server): handle dot-only names and long fake extensions
A name made only of dots trimmed down to an empty filename. It now
falls back to download, like an empty stem does.
path.Ext treats anything after the last dot as the extension, so a long
suffix with no real extension was kept whole and replaced the stem with
download, going past the 255-byte cap. Suffixes longer than 16 bytes
are now treated as part of the stem and truncated with it.
Neither case is reachable from the current call sites, which always
append a short extension.
---------
Signed-off-by: zapisanchez <zapisanchez@gmail.com>
Co-authored-by: Deluan <deluan@navidrome.org>
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| .. | ||
| backgrounds | ||
| events | ||
| filter | ||
| imghttp | ||
| jellyfin | ||
| nativeapi | ||
| public | ||
| subsonic | ||
| testdata | ||
| auth.go | ||
| auth_test.go | ||
| initial_setup.go | ||
| initial_setup_test.go | ||
| middlewares.go | ||
| middlewares_test.go | ||
| serve_index.go | ||
| serve_index_test.go | ||
| server.go | ||
| server_suite_test.go | ||
| server_test.go | ||
| throttle_backlog.go | ||
| throttle_backlog_test.go | ||