withings-scale-pairing-wizard

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

MEDIUM

Why flagged The PKGBUILD downloads prebuilt x86/x86_64 ELF binaries directly from fw.withings.net over plain HTTP (no TLS), installs them as executable files under /opt, and verifies them only with MD5 (cryptographically broken, trivially collisable). fw.withings.net is plausibly Withings' own firmware/CDN host, but: (1) HTTP means no transport-layer integrity; (2) MD5 provides no meaningful collision resistance against a motivated attacker; (3) there is no GPG signature or SHA-256/512 checksum. The combination of an executed binary from a non-standard host over unencrypted HTTP with only MD5 verification is a genuine supply-chain concern — a MITM or a compromised CDN host could substitute a malicious binary that would be installed and run as the user. This is a textbook medium-severity supply-chain risk, not a false positive.

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_i686=("${_pkgname}::http://fw.withings.net/pairingwizard_Linux_x86")

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 prebuilt x86/x86_64 ELF binaries directly from fw.withings.net over plain HTTP (no TLS), installs them as executable files under /opt, and verifies them only with MD5 (cryptographically broken, trivially collisable). fw.withings.net is plausibly Withings' own firmware/CDN host, but: (1) HTTP means no transport-layer integrity; (2) MD5 provides no meaningful collision resistance against a motivated attacker; (3) there is no GPG signature or SHA-256/512 checksum. The combination of an executed binary from a non-standard host over unencrypted HTTP with only MD5 verification is a genuine supply-chain concern — a MITM or a compromised CDN host could substitute a malicious binary that would be installed and run as the user. This is a textbook medium-severity supply-chain risk, not a false positive.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Richard Gibert <richard@gibert.ca>
    
      2_pkgname=withings-scale-pairing-wizard
    
      3pkgname=$_pkgname
    
      4pkgver=1.0
    
      5pkgrel=0
    
      6pkgdesc="Pairing wizard for Withings Scales"
    
      7arch=('i686'
    
      8      'x86_64')
    
      9license=('custom')
    
      10url="https://support.withings.com/hc/en-us/articles/115009772968-Installing-my-Wi-Fi-Body-Scale-WBS01-"
    
      11provides=(${_pkgname})
    
      12
    
      13source_i686=("${_pkgname}::http://fw.withings.net/pairingwizard_Linux_x86")
    
      14md5sums_i686=("21b9067a8a5317827e37b92bf971ee1f")
    
      15
    
      16source_x86_64=("${_pkgname}::http://fw.withings.net/pairingwizard_Linux_x86_64")
    
      17md5sums_x86_64=("97064fc63f19f08711382e01fd76b94d")
    
      18
    
      19package() {
    
      20  install -dm755 "${pkgdir}/opt/${_pkgname}"
    
      21  cp -rp "${srcdir}/${_pkgname}" "${pkgdir}/opt/${_pkgname}/${_pkgname}"
    
      22  chmod 750 "${pkgdir}/opt/${_pkgname}/${_pkgname}"
    
      23}
    
      24

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