com.xylink.linuxclient

maintainer isbest · 1 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt binary .deb package from devcdn.ainemo.com, which is a CDN host associated with Ainemo (爱奈末), not the official xylink.com domain. The package installs and executes binaries (XYWinQTPri, launch.sh) extracted from this .deb. While devcdn.ainemo.com appears to be a legitimate CDN used by Chinese software vendors (Ainemo provides packaging/distribution services), it is not the official upstream host (xylink.com), creating a supply-chain dependency on a third-party CDN. The sha256sum is pinned, which mitigates substitution risk for the specific version, but the host itself is unofficial. This is a real medium-severity concern: prebuilt executables from a non-official host that get installed and run on the user's system. Not clearly malicious, but the trust chain is indirect.

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_x86_64=(https://devcdn.ainemo.com/private_cloud/xinchuangclient/xinchuang3.3/signed_com.xylink.linuxclient_"$pkgver"-20220823_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%): The PKGBUILD downloads a prebuilt binary .deb package from devcdn.ainemo.com, which is a CDN host associated with Ainemo (爱奈末), not the official xylink.com domain. The package installs and executes binaries (XYWinQTPri, launch.sh) extracted from this .deb. While devcdn.ainemo.com appears to be a legitimate CDN used by Chinese software vendors (Ainemo provides packaging/distribution services), it is not the official upstream host (xylink.com), creating a supply-chain dependency on a third-party CDN. The sha256sum is pinned, which mitigates substitution risk for the specific version, but the host itself is unofficial. This is a real medium-severity concern: prebuilt executables from a non-official host that get installed and run on the user's system. Not clearly malicious, but the trust chain is indirect.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: isbest <icoderdev@outlook.com>
    
      2
    
      3pkgname=com.xylink.linuxclient
    
      4pkgver=3.3.0.7571
    
      5pkgrel=2
    
      6pkgdesc="Xylink Video Conferencing linux client."
    
      7arch=('x86_64')
    
      8url="https://www.xylink.com"
    
      9license=('custom:xylink')
    
      10options=('!strip' '!emptydirs')
    
      11source_x86_64=(https://devcdn.ainemo.com/private_cloud/xinchuangclient/xinchuang3.3/signed_com.xylink.linuxclient_"$pkgver"-20220823_amd64.deb)
    
      12sha256sums_x86_64=('01952278f2910101ee00d745dc8964de691698a497e66c861cfaf5bbb596f2df')
    
      13
    
      14package(){
    
      15	echo "-> Extracting the data.tar.xz..."
    
      16	bsdtar -xf data.tar.xz -C "$pkgdir/"
    
      17
    
      18	echo "-> Remove redundant files..."
    
      19	rm -rf "$pkgdir"/com.xylink.linuxclient_"$pkgver"-20220823_amd64.deb
    
      20
    
      21	# License
    
      22	install -D -m644 "$pkgdir"/opt/apps/com.xylink.linuxclient/files/share/doc/nvidia-graphics-driver/copyright \
    
      23	"$pkgdir"/usr/share/licenses/"$pkgname"/LICENSE
    
      24
    
      25	echo "-> Fix file system permission..."
    
      26	chmod 755 "$pkgdir"/usr/share/icons/hicolor/scalable
    
      27	chmod 755 "$pkgdir"/usr/share/icons/hicolor/scalable/apps
    
      28
    
      29	chmod +x "$pkgdir"/opt/apps/com.xylink.linuxclient/files/bin/XYWinQTPri
    
      30	chmod +x "$pkgdir"/opt/apps/com.xylink.linuxclient/files/launch.sh
    
      31}
    
      32

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