mc-tweakeroo-112-liteloader

maintainer eatmyvenom · 1 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD fetches a manifest JSON from masa.dy.fi with sha1sums='SKIP' (no integrity check), then dynamically resolves and downloads a .litemod binary (a JAR-format executed Java archive) from whatever URL the manifest specifies. This is a genuine supply-chain concern: (1) the checksum is skipped entirely, so any MITM or server compromise would deliver an arbitrary binary; (2) the actual binary URL is not known at package definition time — it is resolved at build time from the manifest, meaning the downloaded file is never checksummed against a known-good value; (3) .litemod files are executed by the Minecraft/LiteLoader runtime, so a malicious file would achieve code execution in the JVM. However, masa.dy.fi is the personal/official host of the well-known Minecraft modder 'masa' (Matti Ruohonen), who maintains tweakeroo and several other popular mods, so this is not a random untrusted host — it is the canonical upstream. The risk is real but stems from the lack of checksums and dynamic URL resolution rather than from a clearly malicious actor, placing this squarely in the medium category.

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:14 source=("manifest.json::https://masa.dy.fi/api/games/mods/minecraft/latest/client/")

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 82%): The PKGBUILD fetches a manifest JSON from masa.dy.fi with sha1sums='SKIP' (no integrity check), then dynamically resolves and downloads a .litemod binary (a JAR-format executed Java archive) from whatever URL the manifest specifies. This is a genuine supply-chain concern: (1) the checksum is skipped entirely, so any MITM or server compromise would deliver an arbitrary binary; (2) the actual binary URL is not known at package definition time — it is resolved at build time from the manifest, meaning the downloaded file is never checksummed against a known-good value; (3) .litemod files are executed by the Minecraft/LiteLoader runtime, so a malicious file would achieve code execution in the JVM. However, masa.dy.fi is the personal/official host of the well-known Minecraft modder 'masa' (Matti Ruohonen), who maintains tweakeroo and several other popular mods, so this is not a random untrusted host — it is the canonical upstream. The risk is real but stems from the lack of checksums and dynamic URL resolution rather than from a clearly malicious actor, placing this squarely in the medium category.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: EatMyVenom <eat.my.venomm@gmail.com>
    
      2
    
      3_modname=tweakeroo
    
      4_mcver="1.12.2"
    
      5_modloader="liteloader"
    
      6pkgname=mc-tweakeroo-112-liteloader
    
      7pkgver="0.10.0.dev.20200811.201751"
    
      8pkgrel=1
    
      9pkgdesc="a client-side mod, which adds a whole bunch of various different tweaks to the game."
    
      10arch=('any')
    
      11url="https://masa.dy.fi/mcmods/client_mods/"
    
      12license=('LGPL')
    
      13makedepends=('wget' 'jq')
    
      14source=("manifest.json::https://masa.dy.fi/api/games/mods/minecraft/latest/client/")
    
      15sha1sums=('SKIP')
    
      16
    
      17pkgver() {
    
      18  cd $srcdir
    
      19  cat manifest.json | jq ".[\"mods\"][\"${_mcver}\"][\"${_modloader}\"][\"${_modname}\"][\"version\"]" | sed 's/-/./g;s/+/./g'
    
      20}
    
      21
    
      22build() {
    
      23  wget $(cat manifest.json | jq -r ".[\"mods\"][\"${_mcver}\"][\"${_modloader}\"][\"${_modname}\"][\"url\"]")
    
      24}
    
      25
    
      26package() {
    
      27  install -d -m 755 "${pkgdir}/usr/share/minecraft"
    
      28
    
      29  cp $(cat manifest.json | jq -r ".[\"mods\"][\"${_mcver}\"][\"${_modloader}\"][\"${_modname}\"][\"filename\"]") \
    
      30     "${pkgdir}/usr/share/minecraft/${_modname}-${_mcver}.litemod"
    
      31}
    
      32

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