sigfox-rsa

maintainer maximevince · 0 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged This PKGBUILD downloads a prebuilt ISO from support.sigfox.com (an official Sigfox support portal, not a random personal host) with sha256sums='SKIP' (no integrity verification), extracts a squashfs filesystem from it, and installs prebuilt binaries and shared libraries directly into the system. The concerns are: (1) no checksum verification means any MITM or server-side substitution would go undetected; (2) prebuilt binaries and shared libraries (including librsvisa.so and radio_signal_analyzer_pb) are extracted from an opaque ISO and installed without any source build — this is a classic supply-chain risk pattern; (3) the download happens inside prepare() using wget rather than the source=() array, bypassing makepkg's integrity checking infrastructure entirely. While support.sigfox.com appears to be a legitimate vendor host, the complete absence of checksums combined with direct installation of extracted proprietary binaries and libraries constitutes a real medium-severity supply-chain concern — any compromise of that URL or a network interception would result in arbitrary code execution on the user's system.

Triggered rules

MEDIUM External download from an untrusted host, not in source=() external_download_not_in_source

curl/wget fetches a URL on a non-allowlisted host that is not part of source=(), so it is not checksum-verified by makepkg.

PKGBUILD:16 wget -c https://support.sigfox.com/files/5e6202f04f6f67c0396574bb -O sigfox_rsa.iso

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 82%): This PKGBUILD downloads a prebuilt ISO from support.sigfox.com (an official Sigfox support portal, not a random personal host) with sha256sums='SKIP' (no integrity verification), extracts a squashfs filesystem from it, and installs prebuilt binaries and shared libraries directly into the system. The concerns are: (1) no checksum verification means any MITM or server-side substitution would go undetected; (2) prebuilt binaries and shared libraries (including librsvisa.so and radio_signal_analyzer_pb) are extracted from an opaque ISO and installed without any source build — this is a classic supply-chain risk pattern; (3) the download happens inside prepare() using wget rather than the source=() array, bypassing makepkg's integrity checking infrastructure entirely. While support.sigfox.com appears to be a legitimate vendor host, the complete absence of checksums combined with direct installation of extracted proprietary binaries and libraries constitutes a real medium-severity supply-chain concern — any compromise of that URL or a network interception would result in arbitrary code execution on the user's system.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Maxime Vincent <maxime.vince@gmail.com>
    
      2
    
      3pkgname=sigfox-rsa
    
      4pkgver=3.0.1
    
      5pkgrel=1
    
      6pkgdesc='Sigfox Radio Signal Analyser for use with Sigfox SDR stick'
    
      7arch=(i686 x86_64)
    
      8license=(GPL)
    
      9depends=('fftw' 'qt5-svg' 'alsa-lib')
    
      10makedepends=('squashfs-tools' 'cdrtools')
    
      11sha256sums=('SKIP')
    
      12
    
      13prepare() {
    
      14    mkdir -p  iso
    
      15    cd iso
    
      16    wget -c https://support.sigfox.com/files/5e6202f04f6f67c0396574bb -O sigfox_rsa.iso
    
      17    isoinfo -i sigfox_rsa.iso --find -name "FILESYSTEM.SQUASHFS*" -print 2>/dev/null | xargs isoinfo -i sigfox_rsa.iso -x > filesystem.squashfs
    
      18}
    
      19
    
      20build() {
    
      21    echo Build
    
      22}
    
      23
    
      24package() {
    
      25    if [ -d "$srcdir"/unsq ]; then
    
      26        echo "Already unsquashed. Skipping unsquashfs"
    
      27    else
    
      28        unsquashfs -d "$srcdir"/unsq iso/filesystem.squashfs
    
      29    fi
    
      30    mkdir -p "$pkgdir"/usr/
    
      31    mkdir -p "$pkgdir"/usr/local
    
      32
    
      33    # Some /usr/local/bin paths are hardcoded in the binary, so we should copy them as well
    
      34    mkdir -p "$pkgdir"/usr/local/bin
    
      35    mkdir -p "$pkgdir"/usr/local/bin/sigfox_verified/
    
      36    cp -r "$srcdir"/unsq/usr/local/bin/sigfox_verified "$pkgdir"/usr/local/bin/
    
      37
    
      38    # Copy from /usr/local to /usr
    
      39    cp -r "$srcdir"/unsq/usr/local/bin "$pkgdir"/usr/
    
      40    cp -r "$srcdir"/unsq/usr/local/lib "$pkgdir"/usr/
    
      41    cp "$srcdir"/unsq/usr/lib/librsvisa.so "$pkgdir"/usr/lib/
    
      42
    
      43    # Re-create symlink
    
      44    rm -rf  "$pkgdir"/usr/bin/radio_signal_analyzer_pb
    
      45    ln -s  /usr/bin/sigfox_verified/radio_signal_analyzer_pb "$pkgdir"/usr/bin/radio_signal_analyzer_pb
    
      46
    
      47
    
      48    # Remove unused directories that got copied
    
      49    rm -rf "$pkgdir"/usr/lib/python2.7/site-packages
    
      50    rm -rf "$pkgdir"/usr/lib/python3.5/dist-packages
    
      51    rm -rf "$pkgdir"/usr/lib/python2.7/dist-packages
    
      52    rm -rf "$pkgdir"/usr/lib/python3.5
    
      53    rm -rf "$pkgdir"/usr/lib/python2.7
    
      54    #rm -rf "$pkgdir"/usr/local
    
      55
    
      56    #cp -r unsq/sigfox_rsa/unsq/usr/etc "$pkgdir"/
    
      57    #install -Dm644 bin/radio_signal_analyzer "$pkgdir"/usr/local/bin/radio_signal_analyzer
    
      58    #install -Dm644 bin/sigfox_verified "$pkgdir"/usr/local/bin/
    
      59    libtool --finish /usr/lib
    
      60}
    
      61
    
      62

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