mrupdater

MEDIUM

maintainer koyuawsmbrtn 0 votes scanned 2026-09-17 00:27:14.276658

View on AUR

Why flagged

The package downloads a prebuilt AppImage (executable binary) from an AWS S3 bucket (s3.us-east-1.amazonaws.com/updates.modretro.com) that is operated by ModRetro, the upstream vendor. The AppImage is then executed during the build phase (chmod +x + run with --appimage-extract) and installed as /usr/bin/mrupdater. A sha256 checksum is present, which mitigates substitution attacks at the point of download, but the host is an S3 bucket rather than a canonical VCS release (e.g. GitHub Releases), meaning the object could be silently replaced by whoever controls the bucket without a tag/release audit trail. The license is listed as 'unknown', and the binary is closed-source with no source build. This is a real supply-chain concern (prebuilt closed-source binary from a cloud storage bucket, executed at install time) but there is no evidence of active malice, making MEDIUM the appropriate rating.

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:11 'mrupdater.zip::https://s3.us-east-1.amazonaws.com/updates.modretro.com/apps/MRUpdater-linux-x86_64.zip'

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 AppImage (executable binary) from an AWS S3 bucket (s3.us-east-1.amazonaws.com/updates.modretro.com) that is operated by ModRetro, the upstream vendor. The AppImage is then executed during the build phase (chmod +x + run with --appimage-extract) and installed as /usr/bin/mrupdater. A sha256 checksum is present, which mitigates substitution attacks at the point of download, but the host is an S3 bucket rather than a canonical VCS release (e.g. GitHub Releases), meaning the object could be silently replaced by whoever controls the bucket without a tag/release audit trail. The license is listed as 'unknown', and the binary is closed-source with no source build. This is a real supply-chain concern (prebuilt closed-source binary from a cloud storage bucket, executed at install time) but there is no evidence of active malice, making MEDIUM the appropriate rating.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Leonie Ain <me@koyu.space>
    
      2pkgname=mrupdater
    
      3pkgver=1.7.0
    
      4pkgrel=2
    
      5pkgdesc="ModRetro's official tool for updating your Chromatic firmware"
    
      6arch=('x86_64')
    
      7url="https://modretro.com"
    
      8license=('unknown')
    
      9depends=('fuse2' 'zlib')
    
      10source=(
    
      11    'mrupdater.zip::https://s3.us-east-1.amazonaws.com/updates.modretro.com/apps/MRUpdater-linux-x86_64.zip'
    
      12    'mrupdater.desktop'
    
      13    '99-modretro.rules'
    
      14)
    
      15sha256sums=('4eaffc24ad54a63ab983ae03278f3cc011c41356f17cb63cc1c6e1d6cc193551'
    
      16            'd9f9ed521e6b1fa7a1ed29706ecd9c82e0fab325d569e0b23bc602da2723c20c'
    
      17            '850c99f36f919d337070a22d8d0b711f85d140d0e7e744cc9545d52d8a51de32')
    
      18options=('!strip')
    
      19
    
      20package() {
    
      21    cd "$srcdir"
    
      22    
    
      23    # Find the AppImage file
    
      24    appimage=$(find . -name "*.AppImage" -type f | head -n 1)
    
      25    
    
      26    if [ -z "$appimage" ]; then
    
      27        error "No AppImage found in the archive"
    
      28        return 1
    
      29    fi
    
      30    
    
      31    # Extract icon from AppImage
    
      32    chmod +x "$appimage"
    
      33    "$appimage" --appimage-extract >/dev/null 2>&1 || true
    
      34    
    
      35    # Find and install icon
    
      36    if [ -d "squashfs-root" ]; then
    
      37        # Look for icon files
    
      38        icon=$(find squashfs-root -name "*.png" -o -name "*.svg" | grep -i icon | head -n 1)
    
      39        if [ -n "$icon" ]; then
    
      40            iconext="${icon##*.}"
    
      41            install -Dm644 "$icon" "$pkgdir/usr/share/pixmaps/mrupdater.$iconext"
    
      42        fi
    
      43    fi
    
      44    
    
      45    # Install the AppImage
    
      46    install -Dm755 "$appimage" "$pkgdir/usr/bin/mrupdater"
    
      47    
    
      48    # Install desktop entry from srcdir
    
      49    install -Dm644 "$srcdir/mrupdater.desktop" "$pkgdir/usr/share/applications/mrupdater.desktop"
    
      50    
    
      51    # Install udev rules
    
      52    install -Dm644 "$srcdir/99-modretro.rules" "$pkgdir/etc/udev/rules.d/99-modretro.rules"
    
      53}
    
      54

Scan history

Scanned at (UTC)	Severity	Rules
2026-09-17 00:27:14	Medium	2
2026-09-16 00:03:17	Medium	2
2026-09-15 00:25:31	Medium	2
2026-09-14 00:27:57	Medium	2
2026-09-13 00:19:54	Medium	2
2026-09-12 00:25:17	Medium	2
2026-09-11 00:19:22	Medium	2
2026-09-10 00:22:44	Medium	2
2026-09-09 00:04:09	Medium	2
2026-09-08 00:18:08	Medium	2
2026-09-07 00:30:15	Medium	2
2026-09-06 00:17:06	Medium	2
2026-09-05 00:16:27	Medium	2
2026-09-04 00:03:13	Medium	2
2026-09-03 00:15:47	Medium	2
2026-09-02 00:02:31	Medium	2
2026-09-01 00:11:19	Medium	2
2026-08-31 00:19:57	Medium	2
2026-08-30 00:04:14	Medium	2
2026-08-29 00:29:17	Medium	2