easyconnect-sdu

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt binary (EasyConnect_x64.deb) from download.sangfor.com.cn, which is Sangfor's official vendor download host for their SSL VPN client. While this is the legitimate vendor, the binary is a closed-source executable installed directly onto the system, and the source URL uses plain HTTP (not HTTPS), meaning the download is not transport-protected. The md5sum check provides weak integrity verification (MD5 is cryptographically broken). The package also compiles pango 1.42.4 from source (from the official GNOME FTP mirror) and installs it into a private path to satisfy the old binary's library dependencies. The core concern is a prebuilt closed-source binary from a vendor host over unencrypted HTTP with only MD5 integrity checking — this is a genuine supply-chain risk (silent substitution or MITM possible), though not evidence of active malice. The PKGBUILD also has a functional issue: it calls 'tar xzf data.tar.gz' without first extracting data.tar.gz from the .deb, which would likely fail, but this is a packaging bug rather than a security issue. Overall: medium severity due to executed prebuilt binary over HTTP with weak integrity verification.

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:12 source=("http://download.sangfor.com.cn/download/product/sslvpn/pkg/linux_01/EasyConnect_x64.deb"
PKGBUILD:13 "http://ftp.acc.umu.se/pub/GNOME/sources/pango/1.42/pango-1.42.4.tar.xz")

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 (EasyConnect_x64.deb) from download.sangfor.com.cn, which is Sangfor's official vendor download host for their SSL VPN client. While this is the legitimate vendor, the binary is a closed-source executable installed directly onto the system, and the source URL uses plain HTTP (not HTTPS), meaning the download is not transport-protected. The md5sum check provides weak integrity verification (MD5 is cryptographically broken). The package also compiles pango 1.42.4 from source (from the official GNOME FTP mirror) and installs it into a private path to satisfy the old binary's library dependencies. The core concern is a prebuilt closed-source binary from a vendor host over unencrypted HTTP with only MD5 integrity checking — this is a genuine supply-chain risk (silent substitution or MITM possible), though not evidence of active malice. The PKGBUILD also has a functional issue: it calls 'tar xzf data.tar.gz' without first extracting data.tar.gz from the .deb, which would likely fail, but this is a packaging bug rather than a security issue. Overall: medium severity due to executed prebuilt binary over HTTP with weak integrity verification.

PKGBUILD

2 offending line(s) highlighted

      1# Maintainer: Chen Cui <chentsuei@gmail.com>
    
      2
    
      3pkgname=easyconnect-sdu
    
      4pkgver=7.6.3.0.86415
    
      5pkgrel=1
    
      6pkgdesc="Accessing SDU's network resources over vpn connection."
    
      7arch=('x86_64')
    
      8url="https://vpn.sdu.edu.cn/com/installClient.html"
    
      9license=('custom')
    
      10conflicts=('easyconnect')
    
      11install=${pkgname}.install
    
      12source=("http://download.sangfor.com.cn/download/product/sslvpn/pkg/linux_01/EasyConnect_x64.deb"
    
      13        "http://ftp.acc.umu.se/pub/GNOME/sources/pango/1.42/pango-1.42.4.tar.xz")
    
      14md5sums=('6ed6273f7754454f19835a456ee263e3'
    
      15         'deb171a31a3ad76342d5195a1b5bbc7c')
    
      16package(){
    
      17        tar xzf data.tar.gz -C "${pkgdir}"
    
      18        tar xf ${srcdir}/pango-1.42.4.tar.xz 
    
      19        cd pango-1.42.4
    
      20        ./configure --prefix=/usr
    
      21        make -j4 && make DESTDIR=${pkgdir}"/usr/share/sangfor/EasyConnect/oldlib/pango" install
    
      22        cd ${pkgdir}
    
      23        sed -i 's/Exec=/Exec=env LD_LIBRARY_PATH=\/usr\/share\/sangfor\/EasyConnect\/oldlib\/pango\/usr\/lib /g' "${pkgdir}/usr/share/applications/EasyConnect.desktop"
    
      24        install -D -m644 "${pkgdir}/usr/share/sangfor/EasyConnect/LICENSES.chromium.html" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
    
      25}
    
      26
    
      27

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