restream-chat

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt AppImage binary (an Electron/Chromium-based executable) directly from chat-client.restream.io, which is the official Restream.io subdomain for their chat client distribution. This is the vendor's own CDN/distribution host, not a personal or third-party mirror, so the risk is lower than a truly unofficial host. However, it is still a prebuilt binary blob (not built from source), and there is no GPG signature verification — only a sha512sum. The sha512sum does pin the exact binary, which mitigates silent substitution as long as the checksum itself is trustworthy. The binary is extracted and installed as an executable. This is a standard pattern for AppImage-based AUR packages (similar to many other commercial app packages in AUR like Slack, Discord, etc.). The concern is real but typical for this class of package: if the vendor's host is compromised and the PKGBUILD's checksum is not updated, users would be protected; but if the PKGBUILD itself is updated with a new checksum pointing to a malicious binary, there is no independent verification. This is a genuine but routine supply-chain concern for prebuilt binary packages, not an active attack. Rating remains medium.

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:41 "https://chat-client.restream.io/${_pkgname}"

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 AppImage binary (an Electron/Chromium-based executable) directly from chat-client.restream.io, which is the official Restream.io subdomain for their chat client distribution. This is the vendor's own CDN/distribution host, not a personal or third-party mirror, so the risk is lower than a truly unofficial host. However, it is still a prebuilt binary blob (not built from source), and there is no GPG signature verification — only a sha512sum. The sha512sum does pin the exact binary, which mitigates silent substitution as long as the checksum itself is trustworthy. The binary is extracted and installed as an executable. This is a standard pattern for AppImage-based AUR packages (similar to many other commercial app packages in AUR like Slack, Discord, etc.). The concern is real but typical for this class of package: if the vendor's host is compromised and the PKGBUILD's checksum is not updated, users would be protected; but if the PKGBUILD itself is updated with a new checksum pointing to a malicious binary, there is no independent verification. This is a genuine but routine supply-chain concern for prebuilt binary packages, not an active attack. Rating remains medium.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Trustin Lee <t@motd.kr>
    
      2# Former Maintainer: Arnaud Dovi <mr.dovi@gmail.com>
    
      3
    
      4pkgname=restream-chat
    
      5pkgver=2.5.4
    
      6pkgrel=2
    
      7pkgdesc='Keep your streaming chats in one place by Restream.io'
    
      8arch=('x86_64')
    
      9url='https://restream.io/chat'
    
      10license=()
    
      11provides=(
    
      12  'restream-chat'
    
      13)
    
      14conflicts=(
    
      15  'restream-chat'
    
      16)
    
      17depends=(
    
      18  # [FIXME?] libffpmeg.so is not an official library, is it necessary to bring it to AUR ? (currently only lib32-libffpmeg exists in the AUR...)
    
      19  'alsa-lib'
    
      20  'avahi'
    
      21  'gmp'
    
      22  'gnutls'
    
      23  'gtk3'
    
      24  'krb5'
    
      25  'libglvnd'
    
      26  'libnotify'
    
      27  'libxau'
    
      28  'libxdmcp'
    
      29  'libxss'
    
      30  'nss'
    
      31)
    
      32optdepends=(
    
      33  'libappindicator-gtk2' # libappindicator is shipped in the original AppImage but I'm unsure if it is necessary.
    
      34)
    
      35makedepends=(
    
      36  'coreutils'
    
      37)
    
      38_srcname="squashfs-root"
    
      39_pkgname="Restream+Chat-${pkgver}-beta.AppImage"
    
      40source=(
    
      41  "https://chat-client.restream.io/${_pkgname}"
    
      42)
    
      43sha512sums=(
    
      44  '0bab803e1904c38758816f28e4cf1146a6dd9b4344f972cf88aa537d5ca3b7d9e90e8349804b5c3d411d23c88e82c7b376eb926be163ebb0cbb8fa367b6bd594'
    
      45)
    
      46_stop='\e[m'
    
      47_color="\e[33m"
    
      48_bold='\e[1m'
    
      49_prefix=" ${_bold}${_color}==>${_stop} "
    
      50
    
      51prepare() {
    
      52  #cd "$_srcname" || return
    
      53  echo -e "${_prefix}Extracting the official AppImage file"
    
      54  chmod +x "$_pkgname"
    
      55  ./"$_pkgname" --appimage-extract
    
      56}
    
      57
    
      58package() {
    
      59  cd "$_srcname" || return
    
      60
    
      61  echo -e "${_prefix}Creating the package base"
    
      62  install -d "$pkgdir"/{opt/"${pkgname}",usr/bin,usr/share/pixmaps}
    
      63  install -d "$pkgdir/opt/${pkgname}"/{locales,resources}
    
      64
    
      65  echo -e "${_prefix}Copying the package files"
    
      66  install -Dm 644 locales/* -t "$pkgdir"/opt/"${pkgname}"/locales
    
      67  cp -r resources/* -t "$pkgdir"/opt/"${pkgname}"/resources
    
      68  install -Dm 644 icudtl.dat -t "$pkgdir"/opt/"${pkgname}"
    
      69  install -Dm 644 snapshot_blob.bin -t "$pkgdir"/opt/"${pkgname}"
    
      70  install -Dm 644 v8_context_snapshot.bin -t "$pkgdir"/opt/"${pkgname}"
    
      71  install -Dm 644 natives_blob.bin -t "$pkgdir"/opt/"${pkgname}"
    
      72  install -Dm 644 chrome_100_percent.pak -t "$pkgdir"/opt/"${pkgname}"
    
      73  install -Dm 644 chrome_200_percent.pak -t "$pkgdir"/opt/"${pkgname}"
    
      74  install -Dm 644 resources.pak -t "$pkgdir"/opt/"${pkgname}"
    
      75  # [FIXME?] libffpmeg.so is not an official library, is it necessary to bring it to AUR ? (currently only lib32-libffpmeg exists in the AUR...)
    
      76  install -Dm 644 libffmpeg.so -t "$pkgdir"/opt/"${pkgname}"
    
      77
    
      78  echo -e "${_prefix}Copying the package binaries"
    
      79  install -Dm 755 chrome-sandbox -t "$pkgdir"/opt/"${pkgname}"
    
      80  install -Dm 755 restream-chat -t "$pkgdir"/opt/"${pkgname}"
    
      81
    
      82  echo -e "${_prefix}Setting up /usr/bin launcher"
    
      83  ln -s /opt/"${pkgname}"/restream-chat "$pkgdir"/usr/bin/restream-chat
    
      84
    
      85  echo -e "${_prefix}Setting up desktop icon"
    
      86  cp restream-chat.png "$pkgdir"/usr/share/pixmaps/restream-chat.png
    
      87
    
      88  echo -e "${_prefix}Setting up desktop shortcuts"
    
      89  sed -e "s|Exec=AppRun|Exec=restream-chat --no-sandbox|" -i restream-chat.desktop
    
      90  install -Dm 644 restream-chat.desktop -t "$pkgdir"/usr/share/applications
    
      91}
    
      92

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