substratumnode

MEDIUM

maintainer microoo 0 votes scanned 2026-09-17 00:27:14.276658

View on AUR

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
2026-09-17 00:27:14	Medium	2
2026-09-16 00:03:17	Medium	2
2026-09-15 00:25:31	Medium	2
2026-09-14 00:27:57	Medium	2
2026-09-13 00:19:54	Medium	2
2026-09-12 00:25:17	Medium	2
2026-09-11 00:19:22	Medium	2
2026-09-10 00:22:44	Medium	2
2026-09-09 00:04:09	Medium	2
2026-09-08 00:18:08	Medium	2
2026-09-07 00:30:15	Medium	2
2026-09-06 00:17:06	Medium	2
2026-09-05 00:16:27	Medium	2
2026-09-04 00:03:13	Medium	2
2026-09-03 00:15:47	Medium	2
2026-09-02 00:02:31	Medium	2
2026-09-01 00:11:19	Medium	2
2026-08-31 00:19:57	Medium	2
2026-08-30 00:04:14	Medium	2
2026-08-29 00:29:17	Medium	2