substratumnode

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt binary .deb package from an AWS S3 bucket (substratum-website-downloads) and installs its contents directly. While S3 is a legitimate hosting platform, this is the official Substratum project's own distribution bucket (matching their official domain substratum.net), not a random personal host. The sha256sum is pinned, which mitigates substitution risk. However, the package installs a prebuilt binary blob without source compilation, and S3 buckets can be misconfigured or taken over. The binary is executed/installed directly on the user's system. This is a genuine supply-chain concern (prebuilt binary from a cloud bucket rather than a distro-verified source), but not clearly malicious — consistent with a MEDIUM rating. No piracy or broken flags apply.

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:13 source=("https://s3.us-east-2.amazonaws.com/substratum-website-downloads/v${pkgver}/SubstratumNode-v${pkgver}-Linux64-deb.zip")

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 .deb package from an AWS S3 bucket (substratum-website-downloads) and installs its contents directly. While S3 is a legitimate hosting platform, this is the official Substratum project's own distribution bucket (matching their official domain substratum.net), not a random personal host. The sha256sum is pinned, which mitigates substitution risk. However, the package installs a prebuilt binary blob without source compilation, and S3 buckets can be misconfigured or taken over. The binary is executed/installed directly on the user's system. This is a genuine supply-chain concern (prebuilt binary from a cloud bucket rather than a distro-verified source), but not clearly malicious — consistent with a MEDIUM rating. No piracy or broken flags apply.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Microoo <hu _AT_ m i c r o o o _DOT_ net>
    
      2pkgname=substratumnode
    
      3pkgver=0.4.6
    
      4pkgrel=1
    
      5pkgdesc="SubstratumNode is the foundation of the decentralized SubstratumNetwork. SubstratumNodes work together to relay CORES packages and content on the network."
    
      6arch=('x86_64')
    
      7url="https://substratum.net"
    
      8license=('GPLv3')
    
      9depends=()
    
      10conflicts=('substratumnode-git')
    
      11options=('!strip' '!emptydirs')
    
      12install=${pkgname}.install
    
      13source=("https://s3.us-east-2.amazonaws.com/substratum-website-downloads/v${pkgver}/SubstratumNode-v${pkgver}-Linux64-deb.zip")
    
      14sha256sums=('49e0ace32ba04a8522cd22ec9099f9b23b8717c7f1628bc2e101b7547b48388b')
    
      15
    
      16package(){
    
      17
    
      18    # Extract deb file
    
      19    bsdtar -xf "SubstratumNode_${pkgver}_amd64.deb"
    
      20    
    
      21    # Extract package data
    
      22    tar xf "data.tar.xz" -C "${pkgdir}"
    
      23
    
      24}
    
      25

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