wyc-bin

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt x86_64 binary ('wyc_linux_64') directly from 'down.xiaomy.net', which is the download subdomain of the project's own domain (xiaomy.net, a Chinese intranet tunneling/NAT traversal service). While this is the vendor's own CDN/download host rather than a completely unrelated third-party host, it is still a prebuilt binary with no source code available, installed directly as an executable. The sha256sum provides integrity checking against tampering in transit, but does not protect against the vendor serving a malicious binary. This is a classic supply-chain risk: a closed-source binary from a single vendor host with no reproducibility. The risk is real but not clearly malicious — this is standard 'bin' package territory in AUR, but the binary nature and single-vendor download host warrant medium severity.

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:10 source=("https://down.xiaomy.net/linux/wyc_linux_64")

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 85%): The PKGBUILD downloads a prebuilt x86_64 binary ('wyc_linux_64') directly from 'down.xiaomy.net', which is the download subdomain of the project's own domain (xiaomy.net, a Chinese intranet tunneling/NAT traversal service). While this is the vendor's own CDN/download host rather than a completely unrelated third-party host, it is still a prebuilt binary with no source code available, installed directly as an executable. The sha256sum provides integrity checking against tampering in transit, but does not protect against the vendor serving a malicious binary. This is a classic supply-chain risk: a closed-source binary from a single vendor host with no reproducibility. The risk is real but not clearly malicious — this is standard 'bin' package territory in AUR, but the binary nature and single-vendor download host warrant medium severity.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: sunflowercx <1527981693@qq.com>
    
      2pkgname=wyc-bin
    
      3pkgver=1.0
    
      4pkgrel=1
    
      5install=${pkgname}.install
    
      6pkgdesc="网云穿内网穿透Linux版本"
    
      7arch=("x86_64")
    
      8url="https://xiaomy.net"
    
      9license=('custom')
    
      10source=("https://down.xiaomy.net/linux/wyc_linux_64")
    
      11sha256sums=('c299049774e59ee7a12645a461f571ace0f1b09dcca1b2707a49475ef0d18694')
    
      12package() {
    
      13	install -Dm755 "${pkgname%-bin}_linux_64" -T "$pkgdir/usr/bin/wyc"
    
      14}
    
      15

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