duckclient

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt binary ZIP from duckclient.com (the official project website, matching the url= field) and installs it directly to /opt. This is a prebuilt Electron/NW.js application bundle (MUCK/MUSH client) installed as executable code. While the host matches the stated upstream URL and an md5sum is provided, md5 is cryptographically weak and the binary is not reproducibly built from source. The main concern is that a prebuilt binary from a small personal/project host is installed and executed directly — if the host were compromised or the binary swapped, users would run arbitrary code. This is a classic AUR prebuilt-binary supply-chain concern (medium severity), not an active attack. The source host is the official project domain, which slightly mitigates risk compared to a random personal host, but the pattern of installing unverified prebuilt binaries with only MD5 checksums remains a genuine medium-level 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:8 source=("http://duckclient.com/downloads/DuckClient-$pkgver-linux-x64.zip"

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 binary ZIP from duckclient.com (the official project website, matching the url= field) and installs it directly to /opt. This is a prebuilt Electron/NW.js application bundle (MUCK/MUSH client) installed as executable code. While the host matches the stated upstream URL and an md5sum is provided, md5 is cryptographically weak and the binary is not reproducibly built from source. The main concern is that a prebuilt binary from a small personal/project host is installed and executed directly — if the host were compromised or the binary swapped, users would run arbitrary code. This is a classic AUR prebuilt-binary supply-chain concern (medium severity), not an active attack. The source host is the official project domain, which slightly mitigates risk compared to a random personal host, but the pattern of installing unverified prebuilt binaries with only MD5 checksums remains a genuine medium-level concern.

PKGBUILD

1 offending line(s) highlighted

      1pkgname=duckclient
    
      2pkgver=5.7.0
    
      3pkgrel=1
    
      4pkgdesc="Standalone version of the MUCK/MUSH/MUX/MOO client for chrome."
    
      5arch=('x86_64')
    
      6url="www.duckclient.com"
    
      7license=('custom')
    
      8source=("http://duckclient.com/downloads/DuckClient-$pkgver-linux-x64.zip"
    
      9	"$pkgname"
    
      10	"$pkgname.desktop")
    
      11md5sums=('e7ec4a23284f7a1db2113c4d56505364'
    
      12         'eaaa57848431e81987b34baccc678d10'
    
      13         '28f409026d5b12f0f947e1b690642156')
    
      14package() {
    
      15	cd "$srcdir/DuckClient-$pkgver-linux-x64"
    
      16	install -d "$pkgdir/opt/duckclient"
    
      17	cp -a . "$pkgdir/opt/$pkgname"
    
      18	chmod -R 755 "$pkgdir/opt/$pkgname"
    
      19	install -Dm755 "$srcdir/$pkgname" "$pkgdir/usr/bin/$pkgname"
    
      20	install -Dm644 "$srcdir/$pkgname.desktop" "$pkgdir/usr/share/applications/$pkgname.desktop"
    
      21	install -Dm644 "duckclient-16.png" "$pkgdir/usr/share/pixmaps/duckclient.png"
    
      22	install -Dm644 "license.html" "$pkgdir/usr/share/licenses/$pkgname/license.html"
    
      23}
    
      24

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