cajviewer

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

MEDIUM

Why flagged This PKGBUILD downloads a prebuilt binary .deb from download.cnki.net, which is the official CNKI (China National Knowledge Infrastructure) distribution server for their CAJViewer software. The host is the vendor's own download server, not a random personal or unofficial host. However, the package installs a closed-source, prebuilt binary blob (a proprietary document viewer from a Chinese state-affiliated academic platform) directly into /opt, including shared libraries and a QtWebEngine-based browser component. The sha256sums are pinned, which mitigates MITM risk. The concern is that this is an opaque, unauditable binary from a non-Western vendor with no source code available, executing with full user privileges. This is a legitimate medium-severity supply-chain concern: not clearly malicious, but the binary is executed code from a proprietary, closed-source vendor whose infrastructure cannot be independently verified. The cheaper model's characterization of download.cnki.net as 'non-standard' is partially correct in that it is not a widely-known Western distribution endpoint, but it is the official vendor host. The risk is real but not elevated beyond medium.

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:25 source_x86_64=("https://download.cnki.net/${pkgname}_${pkgver}_amd64.deb")

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 downloads a prebuilt binary .deb from download.cnki.net, which is the official CNKI (China National Knowledge Infrastructure) distribution server for their CAJViewer software. The host is the vendor's own download server, not a random personal or unofficial host. However, the package installs a closed-source, prebuilt binary blob (a proprietary document viewer from a Chinese state-affiliated academic platform) directly into /opt, including shared libraries and a QtWebEngine-based browser component. The sha256sums are pinned, which mitigates MITM risk. The concern is that this is an opaque, unauditable binary from a non-Western vendor with no source code available, executing with full user privileges. This is a legitimate medium-severity supply-chain concern: not clearly malicious, but the binary is executed code from a proprietary, closed-source vendor whose infrastructure cannot be independently verified. The cheaper model's characterization of download.cnki.net as 'non-standard' is partially correct in that it is not a widely-known Western distribution endpoint, but it is the official vendor host. The risk is real but not elevated beyond medium.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: yjun <jerrysteve1101 at gmail dot com>
    
      2# Contributor: swordfeng <swordfeng123@gmail.com>
    
      3# Contributor: TheGoliath <hidden>
    
      4
    
      5pkgname=cajviewer
    
      6pkgver=9.0
    
      7pkgrel=3
    
      8pkgdesc="CAJViewer for Linux. Document Viewer for TEB, CAJ, NH, KDH and PDF format"
    
      9arch=('x86_64')
    
      10url="http://cajviewer.cnki.net/"
    
      11license=('custom')
    
      12depends=(
    
      13        'glibc'
    
      14        'gcc-libs'
    
      15        'bash'
    
      16        'hicolor-icon-theme'
    
      17        'libxml2-legacy'
    
      18#        'qt5-base'
    
      19#        'libcups'
    
      20#        'openssl-1.1'
    
      21#        'qt5-webchannel'
    
      22#        'qt5-webengine'
    
      23)
    
      24source=("cajviewer.sh")
    
      25source_x86_64=("https://download.cnki.net/${pkgname}_${pkgver}_amd64.deb")
    
      26
    
      27# strip will cause cajviewer core dumped 
    
      28options=('!strip')
    
      29sha256sums=('a85c0526d3cdbbc33808c34f8c149050790134f8127b86cbb0bd53786bfeb88b')
    
      30sha256sums_x86_64=('3142c633d74dcf34ebaca9b7653f88ad3619f0b7a6cb689487b6cc583ec926d3')
    
      31
    
      32_install() {
    
      33  find ${@: 2} -type f,l -exec install -Dm$1 {} ${pkgdir}/{} \;
    
      34}
    
      35
    
      36prepare() {
    
      37  cd ${srcdir}
    
      38
    
      39  install -dm755 build
    
      40  tar -xf data.* -C build
    
      41}
    
      42
    
      43package() {
    
      44  cd "$srcdir/build"
    
      45  
    
      46  _install 644 opt/${pkgname}/bin
    
      47  _install 644 opt/${pkgname}/doc/
    
      48  # _install 644 opt/${pkgname}/lib -name "libreaderex_x64.so"
    
      49  _install 644 opt/${pkgname}/lib/
    
      50  _install 644 opt/${pkgname}/libexec/
    
      51  _install 644 opt/${pkgname}/plugins/
    
      52  _install 644 opt/${pkgname}/resources/
    
      53  _install 644 opt/${pkgname}/translations/
    
      54  _install 644 opt/${pkgname}/${pkgname}.png
    
      55  _install 644 opt/${pkgname}/VERSION
    
      56  
    
      57  for _exe in backgroundprocess CAJViewer start.sh
    
      58  do
    
      59    chmod 0755 ${pkgdir}/opt/${pkgname}/bin/${_exe}
    
      60  done
    
      61  chmod 0755 ${pkgdir}/opt/${pkgname}/libexec/QtWebEngineProcess
    
      62
    
      63  # install -dm755 ${pkgdir}/usr/bin/
    
      64  # ln -s /opt/${pkgname}/bin/start.sh ${pkgdir}/usr/bin/${pkgname}
    
      65  install -Dm755 ${srcdir}/cajviewer.sh -t ${pkgdir}/usr/bin
    
      66
    
      67  # mime
    
      68  _install 644 usr/share/mime/
    
      69  _install 644 usr/share/icons/
    
      70  _install 644 usr/share/applications/
    
      71}
    
      72
    
      73# vim: set sw=2 ts=2 et:
    
      74

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