paper-desktop-bin

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

MEDIUM

Why flagged This PKGBUILD downloads a prebuilt binary .deb from download.paper.design (the vendor's own download server, not a personal/unofficial host) and installs it directly. The main concerns are: (1) sha256sums=('SKIP') means no integrity verification — if the host is compromised or the URL is hijacked, a malicious binary would be installed silently; (2) the URL 'https://download.paper.design/linux/deb' appears to serve a rolling/latest release rather than a pinned version, so the downloaded binary can change at any time without the PKGBUILD reflecting it; (3) a prebuilt closed-source binary is being executed on the user's system. The host itself (download.paper.design) is the official vendor domain matching the project URL (paper.design), which reduces but does not eliminate supply-chain risk. The combination of an executed binary with no checksum verification is a genuine medium-severity supply-chain concern — not clearly malicious, but a real risk if the CDN or DNS is compromised.

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 source=("${pkgname%-bin}.deb::https://download.paper.design/linux/deb")

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 binary .deb from download.paper.design (the vendor's own download server, not a personal/unofficial host) and installs it directly. The main concerns are: (1) sha256sums=('SKIP') means no integrity verification — if the host is compromised or the URL is hijacked, a malicious binary would be installed silently; (2) the URL 'https://download.paper.design/linux/deb' appears to serve a rolling/latest release rather than a pinned version, so the downloaded binary can change at any time without the PKGBUILD reflecting it; (3) a prebuilt closed-source binary is being executed on the user's system. The host itself (download.paper.design) is the official vendor domain matching the project URL (paper.design), which reduces but does not eliminate supply-chain risk. The combination of an executed binary with no checksum verification is a genuine medium-severity supply-chain concern — not clearly malicious, but a real risk if the CDN or DNS is compromised.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Wei Zhu <yesmeck@gmail.com>
    
      2pkgname=paper-desktop-bin
    
      3pkgver=0.1.10
    
      4pkgrel=1
    
      5pkgdesc="Paper is a modern and powerful design tool that helps you create, share, and ship your best work."
    
      6arch=('x86_64')
    
      7url="https://paper.design"
    
      8license=('custom')
    
      9options=('!debug' '!strip')
    
      10depends=('gtk3' 'webkit2gtk' 'libappindicator-gtk3')
    
      11source=("${pkgname%-bin}.deb::https://download.paper.design/linux/deb")
    
      12sha256sums=('SKIP')
    
      13
    
      14pkgver() {
    
      15  cd "$srcdir"
    
      16  # Extract control info from deb to get version
    
      17  bsdtar -xf "${pkgname%-bin}.deb" control.tar.xz
    
      18  bsdtar -xf control.tar.xz ./control
    
      19  grep -E '^Version:' control | sed 's/Version: //' | cut -d'-' -f1
    
      20}
    
      21
    
      22package() {
    
      23  # Extract the deb package
    
      24  bsdtar -xf "$srcdir/${pkgname%-bin}.deb" -C "$srcdir"
    
      25  bsdtar -xf "$srcdir/data.tar.xz" -C "$pkgdir"
    
      26  
    
      27  # Fix permissions
    
      28  find "$pkgdir" -type d -exec chmod 755 {} \;
    
      29  find "$pkgdir" -type f -exec chmod 644 {} \;
    
      30  
    
      31  # Make binaries executable
    
      32  find "$pkgdir/usr/bin" -type f -exec chmod 755 {} \; 2>/dev/null || true
    
      33  
    
      34  # Make the main binary in /opt executable
    
      35  chmod 755 "$pkgdir/opt/Paper/paper-desktop"
    
      36  
    
      37  # Create symlink to /usr/bin if it doesn't exist
    
      38  install -d "$pkgdir/usr/bin"
    
      39  ln -sf "/opt/Paper/paper-desktop" "$pkgdir/usr/bin/paper-desktop"
    
      40}
    
      41

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