fcast-receiver-bin

maintainer LA-MJ · 3 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt Electron .deb binary from dl.fcast.org, which is a subdomain of fcast.org — the project's own distribution domain (FCast is a FUTO project). This is not a random personal host; it appears to be the official release CDN for the FCast receiver. However, it is still a prebuilt binary (Electron app) pulled from a non-forge host rather than being built from source or pulled from the GitLab releases page directly. The sha256sum is pinned, which mitigates substitution risk. The concern is real but mild: if dl.fcast.org were compromised, a malicious binary would be installed. This is the standard risk profile for any -bin AUR package pulling from a vendor CDN rather than a forge release attachment. The cheaper model's MEDIUM rating is defensible but arguably a false positive for a vendor-operated CDN with a pinned checksum — this is standard -bin package practice. Keeping MEDIUM due to the prebuilt binary nature and the fact that dl.fcast.org is a separate infrastructure from the GitLab forge, but confidence is moderate.

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:38 source=("${pkgname}.deb::https://dl.fcast.org/electron/${pkgver}/deb/x64/fcast-receiver-${pkgver}-linux-x64.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 Electron .deb binary from dl.fcast.org, which is a subdomain of fcast.org — the project's own distribution domain (FCast is a FUTO project). This is not a random personal host; it appears to be the official release CDN for the FCast receiver. However, it is still a prebuilt binary (Electron app) pulled from a non-forge host rather than being built from source or pulled from the GitLab releases page directly. The sha256sum is pinned, which mitigates substitution risk. The concern is real but mild: if dl.fcast.org were compromised, a malicious binary would be installed. This is the standard risk profile for any -bin AUR package pulling from a vendor CDN rather than a forge release attachment. The cheaper model's MEDIUM rating is defensible but arguably a false positive for a vendor-operated CDN with a pinned checksum — this is standard -bin package practice. Keeping MEDIUM due to the prebuilt binary nature and the fact that dl.fcast.org is a separate infrastructure from the GitLab forge, but confidence is moderate.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer LA-MJ [ 4mr.minj at google-mail , com ]
    
      2pkgname=fcast-receiver-bin
    
      3epoch=1
    
      4pkgver=2.2.4
    
      5pkgrel=1
    
      6pkgdesc="Binary releases of Fcast"
    
      7arch=('x86_64')
    
      8conflicts=("fcast-receiver-bin" "fcast-receiver-git" "fcast-receiver")
    
      9provides=("fcast-receiver")
    
      10url="https://gitlab.futo.org/videostreaming/fcast"
    
      11license=('MIT')
    
      12depends=(
    
      13'alsa-lib'
    
      14'at-spi2-core'
    
      15'cairo'
    
      16'dbus'
    
      17'expat'
    
      18'gcc-libs'
    
      19'glib2'
    
      20'glibc'
    
      21'gtk3'
    
      22'libcups'
    
      23'libdrm'
    
      24'libudev.so=1'
    
      25'libx11'
    
      26'libxcb'
    
      27'libxcomposite'
    
      28'libxdamage'
    
      29'libxext'
    
      30'libxfixes'
    
      31'libxkbcommon'
    
      32'libxrandr'
    
      33'mesa'
    
      34'nspr'
    
      35'nss'
    
      36'pango'
    
      37)
    
      38source=("${pkgname}.deb::https://dl.fcast.org/electron/${pkgver}/deb/x64/fcast-receiver-${pkgver}-linux-x64.deb")
    
      39sha256sums=('f89953b60eda63aaf73d64c70ea7d55205a9a22a0b2da80ff829eaa73f64a4dd')
    
      40
    
      41package() {
    
      42    bsdtar -xf data.tar.xz -C "$pkgdir/"
    
      43    install -Dm644 "${pkgdir}/usr/share/doc/fcast-receiver/copyright" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
    
      44    rm -r "${pkgdir}/usr/share/doc" "${pkgdir}/usr/share/lintian"
    
      45}
    
      46

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