katawa-shoujo-bin

maintainer snit · 2 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The package downloads a prebuilt binary archive (containing a Ren'Py engine binary and Python libraries that are executed at runtime) from cdn.fhs.sh, which is not the official upstream host (katawa-shoujo.com). The official KS Linux download is distributed directly from the Four Leaf Studios site or mirrors like itch.io/lemmasoft, not cdn.fhs.sh. This is a personal/unofficial CDN operated by the maintainer or a third party, meaning the binary could be substituted without upstream's knowledge. A sha256 checksum is present, which mitigates tampering after the fact but does not establish trust in the source host itself — if the CDN is compromised or the maintainer rotates the file, the checksum would need to be updated. The installed content includes a native Linux x86_64 binary (the Ren'Py launcher) and Python libraries, all of which are executed on the user's system. This is a genuine supply-chain concern: executed binaries from an unofficial host. The piracy flag does not apply since Katawa Shoujo is a free, legally distributed game under CC-BY-NC-ND-3.0.

Triggered rules

MEDIUM source=() URL on a non-standard host source_untrusted_domain

One or more source=() URLs point to a host outside the trusted allowlist (github.com, gitlab.com, codeberg.org, pypi.org, …).

PKGBUILD:20 "ks.tar.zst::https://cdn.fhs.sh/ks/bin/${pkgver}/%5B4ls%5D_katawa_shoujo_${pkgver}-%5Blinux-x86%5D%5BBA993979%5D.tar.zst"

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 72%): The package downloads a prebuilt binary archive (containing a Ren'Py engine binary and Python libraries that are executed at runtime) from cdn.fhs.sh, which is not the official upstream host (katawa-shoujo.com). The official KS Linux download is distributed directly from the Four Leaf Studios site or mirrors like itch.io/lemmasoft, not cdn.fhs.sh. This is a personal/unofficial CDN operated by the maintainer or a third party, meaning the binary could be substituted without upstream's knowledge. A sha256 checksum is present, which mitigates tampering after the fact but does not establish trust in the source host itself — if the CDN is compromised or the maintainer rotates the file, the checksum would need to be updated. The installed content includes a native Linux x86_64 binary (the Ren'Py launcher) and Python libraries, all of which are executed on the user's system. This is a genuine supply-chain concern: executed binaries from an unofficial host. The piracy flag does not apply since Katawa Shoujo is a free, legally distributed game under CC-BY-NC-ND-3.0.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: snit <snit@cock.li>
    
      2# Contributor: Alice Jenkinson <virtual.aur at zero-x dot nz>
    
      3
    
      4_pkgname="katawa-shoujo"
    
      5pkgname="$_pkgname-bin"
    
      6pkgver=1.3.2
    
      7pkgrel=1
    
      8pkgdesc="A bishoujo-style visual novel by Four Leaf Studios"
    
      9url="https://www.katawa-shoujo.com"
    
      10license=("CC-BY-NC-ND-3.0")
    
      11arch=("x86_64")
    
      12
    
      13provides=("$_pkgname=$pkgver")
    
      14conflicts=("$_pkgname")
    
      15
    
      16options=("!strip")
    
      17
    
      18_pkgsrc="Katawa Shoujo-$pkgver-linux"
    
      19source=(
    
      20  "ks.tar.zst::https://cdn.fhs.sh/ks/bin/${pkgver}/%5B4ls%5D_katawa_shoujo_${pkgver}-%5Blinux-x86%5D%5BBA993979%5D.tar.zst"
    
      21  "katawa-shoujo.png"
    
      22)
    
      23
    
      24sha256sums=(
    
      25  'c76b644b9d7582b20c50d0a984e426b6a85d8c564325e73ad29637210e31e0af'
    
      26  'dcd08ef958f785ac52b88a255680e385051d6b6a9626e57f00acb44021d7c0ee'
    
      27)
    
      28
    
      29package() {
    
      30  cd "$_pkgsrc"
    
      31
    
      32  # main files
    
      33  install -dm755 "$pkgdir/usr/share/$_pkgname"
    
      34  cp --reflink=auto -a game renpy "Katawa Shoujo.py" "$pkgdir/usr/share/$_pkgname/"
    
      35
    
      36  install -dm755 "$pkgdir/usr/share/$_pkgname/lib"
    
      37  cp --reflink=auto -a lib/linux-x86_64 lib/pythonlib2.7 "$pkgdir/usr/share/$_pkgname/lib/"
    
      38
    
      39  # script
    
      40  install -Dm755 /dev/stdin "$pkgdir/usr/bin/$_pkgname" << END
    
      41#!/bin/sh
    
      42BASE="/usr/share/katawa-shoujo"
    
      43LIB="\$BASE/lib/linux-x86_64"
    
      44BASEFILE="Katawa Shoujo"
    
      45
    
      46exec "\$LIB/\$BASEFILE" \$RENPY_PYARGS -EO "\$BASE/\$BASEFILE.py" "\$@"
    
      47END
    
      48
    
      49  install -Dm644 /dev/stdin "$pkgdir/usr/share/applications/$_pkgname.desktop" << END
    
      50[Desktop Entry]
    
      51Name=Katawa Shoujo
    
      52Comment=$pkgdesc
    
      53Exec=$_pkgname
    
      54Icon=$_pkgname
    
      55Type=Application
    
      56Categories=Game;
    
      57END
    
      58
    
      59  # icon
    
      60  install -Dm644 "$srcdir/$_pkgname.png" -t "$pkgdir/usr/share/pixmaps/"
    
      61
    
      62  # license
    
      63  install -Dm644 LICENSE.txt "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
    
      64
    
      65  # manual
    
      66  install -Dm644 'Game Manual.pdf' "$pkgdir/usr/share/doc/$pkgname/gamemanual.pdf"
    
      67}
    
      68

Scan history

Scanned at (UTC)	Severity	Rules
2026-08-03 00:08:14	MEDIUM	2
2026-08-02 00:16:08	MEDIUM	2
2026-08-01 00:11:18	MEDIUM	2
2026-07-31 00:14:10	MEDIUM	2
2026-07-30 00:17:23	MEDIUM	2
2026-07-29 00:25:53	MEDIUM	2
2026-07-28 00:07:28	MEDIUM	2
2026-07-27 00:24:32	MEDIUM	2
2026-07-26 00:07:32	MEDIUM	2
2026-07-25 00:13:44	MEDIUM	2
2026-07-24 00:02:28	MEDIUM	2
2026-07-23 00:14:47	MEDIUM	2
2026-07-22 00:29:32	MEDIUM	2
2026-07-21 00:24:15	MEDIUM	2
2026-07-20 00:19:49	MEDIUM	2
2026-07-19 00:17:08	MEDIUM	2
2026-07-18 00:14:48	MEDIUM	2
2026-07-17 00:06:16	MEDIUM	2
2026-07-16 00:05:41	MEDIUM	2
2026-07-15 00:09:25	MEDIUM	2