paper-desktop-bin

MEDIUM

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

View on AUR

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
2026-09-17 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