slic3r-dev

maintainer msrd0 · 2 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt binary tarball at build time via wget in prepare() from dl.slic3r.org, using a commit SHA derived from the GitHub API response. This binary is not listed in source=() and has no checksum verification (no sha512sum entry for it). The domain dl.slic3r.org is the official Slic3r download server, not a random personal host, which reduces but does not eliminate risk. However, the core concern is real: (1) the binary is a prebuilt executable installed to /opt and run directly, (2) it is fetched outside of makepkg's integrity-checking framework (no checksum, not in source=), and (3) the SHA used to construct the URL comes from a GitHub API JSON response that is itself only SKIP-verified. If dl.slic3r.org were compromised or the domain expired/hijacked, arbitrary code would execute on the user's system. This is a genuine supply-chain concern — an executed binary from a host with no integrity verification — warranting a medium rating.

Triggered rules

MEDIUM External download from an untrusted host, not in source=() external_download_not_in_source

curl/wget fetches a URL on a non-allowlisted host that is not part of source=(), so it is not checksum-verified by makepkg.

PKGBUILD:32 wget -q --show-progress -O slic3r.tar.bz2 "https://dl.slic3r.org/dev/linux/slic3r-${_pkgver//_/-}-${sha:0:7}-linux-x64.tar.bz2"

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 82%): The PKGBUILD downloads a prebuilt binary tarball at build time via wget in prepare() from dl.slic3r.org, using a commit SHA derived from the GitHub API response. This binary is not listed in source=() and has no checksum verification (no sha512sum entry for it). The domain dl.slic3r.org is the official Slic3r download server, not a random personal host, which reduces but does not eliminate risk. However, the core concern is real: (1) the binary is a prebuilt executable installed to /opt and run directly, (2) it is fetched outside of makepkg's integrity-checking framework (no checksum, not in source=), and (3) the SHA used to construct the URL comes from a GitHub API JSON response that is itself only SKIP-verified. If dl.slic3r.org were compromised or the domain expired/hijacked, arbitrary code would execute on the user's system. This is a genuine supply-chain concern — an executed binary from a host with no integrity verification — warranting a medium rating.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Dominic Meiser git at msrd0 dot de
    
      2
    
      3pkgname=slic3r-dev
    
      4_pkgver=1.3.1_dev
    
      5pkgver=$_pkgver
    
      6pkgrel=4
    
      7pkgdesc="Development build of Slic3r, a 3D Printer Toolpath Generator"
    
      8arch=('x86_64')
    
      9url="https://slic3r.org"
    
      10license=('AGPL3')
    
      11depends=('freeglut' 'glu' 'gtk2' 'perl')
    
      12makedepends=('jq' 'wget')
    
      13conflicts=('slic3r' 'slic3r-git' 'slic3r-bin')
    
      14provides=('slic3r')
    
      15source=("master.json::https://api.github.com/repos/alexrj/slic3r/branches/master"
    
      16        "slic3r.desktop")
    
      17sha512sums=('SKIP'
    
      18            '0a3c840681077cf052fe7335d7275e2967d3f753082036f8a59bc1ab7b704874e481f33764a39ad4c481adc280ee3b9f594a0f3047659ef2c95aa708ead43593')
    
      19
    
      20pkgver()
    
      21{
    
      22	cd $srcdir
    
      23	time=$(date --date=$(jq '.commit.commit.committer.date' master.json | tr -d '"') '+%Y%m%dT%H%M%S')
    
      24	sha=$(jq '.commit.sha' master.json | tr -d '"')
    
      25	echo "${_pkgver}.${time}.${sha:0:7}"
    
      26}
    
      27
    
      28prepare()
    
      29{
    
      30	cd $srcdir
    
      31	sha=$(jq '.commit.sha' master.json | tr -d '"')
    
      32	wget -q --show-progress -O slic3r.tar.bz2 "https://dl.slic3r.org/dev/linux/slic3r-${_pkgver//_/-}-${sha:0:7}-linux-x64.tar.bz2"
    
      33}
    
      34
    
      35package()
    
      36{
    
      37	cd $srcdir
    
      38	
    
      39	install -d "$pkgdir/opt"
    
      40	tar xfj slic3r.tar.bz2 -C "$pkgdir/opt/"
    
      41	sed -i "$pkgdir/opt/Slic3r/Slic3r" -e 's/DIR=.*$/DIR=\/opt\/Slic3r/'
    
      42	sed -i "$pkgdir/opt/Slic3r/Slic3r" -e 's/LD_LIBRARY_PATH=.*$/LD_LIBRARY_PATH=\/opt\/Slic3r\/bin/'
    
      43	
    
      44	install -d "$pkgdir/usr/bin"
    
      45	ln -s "/opt/Slic3r/Slic3r" "$pkgdir/usr/bin/slic3r"
    
      46	
    
      47	install -d "$pkgdir/usr/share/applications"
    
      48	install -m 644 $srcdir/slic3r.desktop "$pkgdir/usr/share/applications/"
    
      49}
    
      50

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