falcon-sensor

maintainer kylethompson · 8 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt proprietary binary (CrowdStrike Falcon Sensor .deb) from socfoundry.com, which is not CrowdStrike's official distribution domain (falcon.crowdstrike.com or similar). This is a third-party/personal host redistributing a closed-source security kernel module/EDR agent that runs with root privileges and deep system access. Even with a sha256sum check, the concern is whether socfoundry.com is an authorized redistribution point for CrowdStrike software — it is not. If this host is compromised or serves a tampered binary, the attacker gains full system access via a trusted security agent. The sha256sum provides integrity only against the specific file currently hosted, not authenticity. This is a genuine supply-chain concern: an executed binary from an unofficial host, not CrowdStrike's own infrastructure. The MEDIUM rating is correct and well-founded.

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:40 source=("falcon-sensor_${_pkgver}-${_pkgrel}_amd64.deb::https://socfoundry.com/downloads/falcon-sensor_${_pkgver}-${_pkgrel}_amd64.deb"

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 proprietary binary (CrowdStrike Falcon Sensor .deb) from socfoundry.com, which is not CrowdStrike's official distribution domain (falcon.crowdstrike.com or similar). This is a third-party/personal host redistributing a closed-source security kernel module/EDR agent that runs with root privileges and deep system access. Even with a sha256sum check, the concern is whether socfoundry.com is an authorized redistribution point for CrowdStrike software — it is not. If this host is compromised or serves a tampered binary, the attacker gains full system access via a trusted security agent. The sha256sum provides integrity only against the specific file currently hosted, not authenticity. This is a genuine supply-chain concern: an executed binary from an unofficial host, not CrowdStrike's own infrastructure. The MEDIUM rating is correct and well-founded.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Kyle Thompson <kylejeromethompson@gmail.com>
    
      2#
    
      3# --- DISCLAIMER ---
    
      4# This PKGBUILD is an unofficial community contribution. It is not affiliated with,
    
      5# endorsed, or supported by CrowdStrike, Inc.
    
      6#
    
      7# The CrowdStrike Falcon sensor is proprietary software. By building and installing
    
      8# this package, you acknowledge that you are downloading software directly from
    
      9# CrowdStrike and agree to be bound by their End User License Agreement and
    
      10# Privacy Notice. You are solely responsible for ensuring you have a valid
    
      11# license to use the software.
    
      12#
    
      13# This installation script is provided "AS IS" without warranty of any kind,
    
      14# express or implied. The user assumes all risk and responsibility for its use.
    
      15#
    
      16# Terms of Use: https://www.crowdstrike.com/software-terms-of-use/
    
      17# Privacy Notice: https://www.crowdstrike.com/privacy-notice/
    
      18
    
      19
    
      20# --- Package Information ---
    
      21pkgname='falcon-sensor'
    
      22pkgdesc="CrowdStrike Falcon Sensor for Linux"
    
      23arch=('x86_64')
    
      24url="https://falcon.crowdstrike.com/"
    
      25license=('custom')
    
      26
    
      27# --- Versioning ---
    
      28_pkgver='7.32.0'
    
      29_pkgrel='18504'
    
      30pkgver=${_pkgver}
    
      31pkgrel=${_pkgrel}
    
      32
    
      33# --- Dependencies and Conflicts ---
    
      34depends=('glibc' 'openssl')
    
      35provides=("${pkgname}")
    
      36conflicts=("${pkgname}")
    
      37install="${pkgname}.install"
    
      38
    
      39# --- Source Files ---
    
      40source=("falcon-sensor_${_pkgver}-${_pkgrel}_amd64.deb::https://socfoundry.com/downloads/falcon-sensor_${_pkgver}-${_pkgrel}_amd64.deb"
    
      41        "falcon-sensor.hook")
    
      42sha256sums=('0c3ac12e749647cd05a8e8bd6281541e5ba8496ca1ba042eda6637f547db5dc0'
    
      43            'SKIP')
    
      44
    
      45# --- Packaging Function ---
    
      46package() {
    
      47  # Extract the data archive from the .deb file
    
      48  tar -xf "${srcdir}/data.tar.xz" -C "${pkgdir}/"
    
      49
    
      50  # Create the destination directory structure first (-p creates parent dirs if needed)
    
      51  mkdir -p "${pkgdir}/usr/lib/"
    
      52
    
      53  # Move the contents of the extracted 'lib' directory to '/usr/lib' inside the package
    
      54  mv "${pkgdir}/lib"/* "${pkgdir}/usr/lib/"
    
      55
    
      56  # Remove the now-empty 'lib' directory from the package
    
      57  rmdir "${pkgdir}/lib"
    
      58
    
      59  # Install pacman hook to clean up runtime-generated files before upgrades
    
      60  install -Dm644 "${srcdir}/falcon-sensor.hook" "${pkgdir}/usr/share/libalpm/hooks/falcon-sensor.hook"
    
      61}
    
      62

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