dudenbib

MEDIUM

maintainer bwrst 1 votes scanned 2026-09-17 00:27:14.276658

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Why flagged

The PKGBUILD downloads a prebuilt proprietary .deb binary from cdn.duden.de (the official Duden CDN, not a personal/unofficial host) and installs it directly. While cdn.duden.de is the vendor's own CDN for Duden software distribution, it is not a standard upstream release host like GitHub releases or a distro mirror, and the package installs a closed-source binary blob without source verification beyond a single MD5 checksum (which is cryptographically weak). The binary is extracted and executed/installed into /opt and /usr, including a postinst script. This constitutes a real supply-chain concern: if the CDN were compromised or the URL redirected, a malicious binary would be installed with 755 permissions. The use of MD5 rather than SHA-256 weakens integrity guarantees. However, cdn.duden.de is the legitimate vendor CDN for this commercial software, so this is closer to a legitimate vendor binary package than a truly unofficial host — the risk is real but not elevated to a clear attack.

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:14 source=("https://cdn.duden.de/downloads/proxy/duden_bibliothek-update-6.5/$FILE")

Medium AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 72%): The PKGBUILD downloads a prebuilt proprietary .deb binary from cdn.duden.de (the official Duden CDN, not a personal/unofficial host) and installs it directly. While cdn.duden.de is the vendor's own CDN for Duden software distribution, it is not a standard upstream release host like GitHub releases or a distro mirror, and the package installs a closed-source binary blob without source verification beyond a single MD5 checksum (which is cryptographically weak). The binary is extracted and executed/installed into /opt and /usr, including a postinst script. This constitutes a real supply-chain concern: if the CDN were compromised or the URL redirected, a malicious binary would be installed with 755 permissions. The use of MD5 rather than SHA-256 weakens integrity guarantees. However, cdn.duden.de is the legitimate vendor CDN for this commercial software, so this is closer to a legitimate vendor binary package than a truly unofficial host — the risk is real but not elevated to a clear attack.

PKGBUILD

1 offending line(s) highlighted

      1# Contributor: Steff <archuserrepository at gmx dot de>
    
      2# Contributor: Felix <flx.bier at googlemail dot com>
    
      3
    
      4pkgname=dudenbib
    
      5pkgver=6.5.2
    
      6pkgrel=2
    
      7arch=('x86_64')
    
      8pkgdesc="Utility to view books from Duden, Brockhaus and some others"
    
      9url="https://www.duden.de/digitales/duden-bibliothek"
    
      10license=('custom:dudenbib')
    
      11install=duden.install
    
      12depends=('libxmu' 'libxft' 'libxcursor' 'libxrandr' 'gcc-libs' 'libxi' 'libxinerama' 'libxcb' 'xcb-util-cursor')
    
      13FILE="dudenbibliothek6_6.5.2.0_amd64.deb"
    
      14source=("https://cdn.duden.de/downloads/proxy/duden_bibliothek-update-6.5/$FILE")
    
      15noextract=("$FILE")
    
      16md5sums=('0086cb9b3e39c40fcb858b542af5a3d4')
    
      17package() {
    
      18  ar -x $FILE data.tar.zst control.tar.zst
    
      19  tar -xf data.tar.zst -C "$pkgdir"
    
      20  tar -xf control.tar.zst
    
      21
    
      22  chmod -R 755 "${pkgdir}/opt"
    
      23  chmod -R 755 "${pkgdir}/usr"
    
      24
    
      25  install -Dm755 "${srcdir}/postinst" "${pkgdir}/usr/share/dudenbib/postinst"
    
      26}
    
      27
    
      28

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