tscdriver

maintainer Thorned_Rose · 3 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged This PKGBUILD installs prebuilt binaries (thermalprinterui, thermalprinterut with SUID bit 4755, brusb, brsocket CUPS backends, rastertobarcodetspl CUPS filter) extracted from a zip archive hosted on fs.tscprinters.com. While tscprinters.com is the official TSC printer vendor website, fs.tscprinters.com is a file-hosting subdomain that is not a well-known, independently verifiable software distribution channel. The binaries are executed directly without any source build, and one binary (thermalprinterut) is installed SUID root (mode 4755), which is a significant privilege escalation vector if the binary is malicious or compromised. A sha256sum is present, which mitigates substitution attacks somewhat, but does not verify the integrity of the original vendor release. The combination of unverified prebuilt binaries from a vendor subdomain plus a SUID binary installation constitutes a real medium-severity supply-chain concern.

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:12 source=("$pkgname-$pkgver.zip::https://fs.tscprinters.com/system/files/linux64_v${pkgver}.zip")

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 72%): This PKGBUILD installs prebuilt binaries (thermalprinterui, thermalprinterut with SUID bit 4755, brusb, brsocket CUPS backends, rastertobarcodetspl CUPS filter) extracted from a zip archive hosted on fs.tscprinters.com. While tscprinters.com is the official TSC printer vendor website, fs.tscprinters.com is a file-hosting subdomain that is not a well-known, independently verifiable software distribution channel. The binaries are executed directly without any source build, and one binary (thermalprinterut) is installed SUID root (mode 4755), which is a significant privilege escalation vector if the binary is malicious or compromised. A sha256sum is present, which mitigates substitution attacks somewhat, but does not verify the integrity of the original vendor release. The combination of unverified prebuilt binaries from a vendor subdomain plus a SUID binary installation constitutes a real medium-severity supply-chain concern.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: rafaelff <rafaelff@gnome.org>
    
      2
    
      3pkgname=tscdriver
    
      4pkgver=1.2.13
    
      5pkgrel=1
    
      6pkgdesc="Drivers for TSC Printers"
    
      7arch=(x86_64)
    
      8url="https://www.tscprinters.com"
    
      9license=('custom:proprietary')
    
      10depends=(gtk2 libusb)
    
      11makedepends=(unzip)
    
      12source=("$pkgname-$pkgver.zip::https://fs.tscprinters.com/system/files/linux64_v${pkgver}.zip")
    
      13sha256sums=('8661fa914b0b07b4c3f32ab9900397a4cb3503e1f1e35aa081e21e6f20c6a2dd')
    
      14
    
      15prepare() {
    
      16  #unzip linux64_v${pkgver}/Linux64_v${pkgver}.zip
    
      17  tar xf Linux64_v${pkgver}/barcodedriver-${pkgver}-x86_64.tar.gz
    
      18}
    
      19
    
      20package() {
    
      21  cd barcodedriver-$pkgver
    
      22
    
      23  install -vdm755 "$pkgdir/usr/bin/"
    
      24  install -vm755 thermalprinterui               "$pkgdir/usr/bin/"
    
      25  install -vm4755 thermalprinterut              "$pkgdir/usr/bin/"
    
      26
    
      27  install -vdm755 "$pkgdir/usr/lib/cups/backend/"
    
      28  install -vm755 backend/brusb                  "$pkgdir/usr/lib/cups/backend/"
    
      29  install -vm755 backend/brsocket               "$pkgdir/usr/lib/cups/backend/"
    
      30
    
      31  install -vdm755 "$pkgdir/usr/lib/cups/filter/"
    
      32  install -vm755 rastertobarcodetspl            "$pkgdir/usr/lib/cups/filter/rastertobarcodetspl"
    
      33
    
      34  install -vdm755 "$pkgdir/usr/share/cups/model/tsc-ppds/"
    
      35  install -vm644 ppd/*.ppd                      "$pkgdir/usr/share/cups/model/tsc-ppds/"
    
      36
    
      37  install -vDm644 thermalprinterui.png          "$pkgdir/usr/share/icons/hicolor/128x128/apps/thermalprinterui.png"
    
      38  install -vDm644 barcodeprintersetting.desktop "$pkgdir/usr/share/applications/barcodeprintersetting.desktop"
    
      39  sed -i "$pkgdir/usr/share/applications/barcodeprintersetting.desktop" \
    
      40    -e 's/Exec=.*/Exec=thermalprinterui/;s/Icon=.*/Icon=thermalprinterui.png/'
    
      41}
    
      42

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