musl-cross-bin

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

MEDIUM

Why flagged This PKGBUILD downloads a prebuilt binary cross-compiler toolchain (containing gcc, binutils, libc, and other executables) from more.musl.cc, which is a subdomain of the known musl.cc project that distributes prebuilt musl-based toolchains. While musl.cc is a legitimate and well-known resource in the Linux embedded/cross-compilation community, two concerns remain: (1) the checksum is set to 'SKIP', meaning there is zero integrity verification — any MITM or server-side substitution would go undetected; (2) the artifact is a prebuilt binary toolchain that gets installed to /opt/cross and will be executed by users, making integrity verification critical. The host itself (more.musl.cc) is not an official distribution channel like a distro mirror or a major forge, and the lack of any hash means the supply-chain risk is real and unmitigated. This is a genuine medium-severity concern: not clearly malicious, but an executed binary from a semi-official host with no checksum verification.

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://more.musl.cc/${pkgver}/x86_64-linux-musl/x86_64-linux-musl-cross.tgz")

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 85%): This PKGBUILD downloads a prebuilt binary cross-compiler toolchain (containing gcc, binutils, libc, and other executables) from more.musl.cc, which is a subdomain of the known musl.cc project that distributes prebuilt musl-based toolchains. While musl.cc is a legitimate and well-known resource in the Linux embedded/cross-compilation community, two concerns remain: (1) the checksum is set to 'SKIP', meaning there is zero integrity verification — any MITM or server-side substitution would go undetected; (2) the artifact is a prebuilt binary toolchain that gets installed to /opt/cross and will be executed by users, making integrity verification critical. The host itself (more.musl.cc) is not an official distribution channel like a distro mirror or a major forge, and the lack of any hash means the supply-chain risk is real and unmitigated. This is a genuine medium-severity concern: not clearly malicious, but an executed binary from a semi-official host with no checksum verification.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: TheOddCell <rayfb.to.1@gmail.com>
    
      2pkgname=musl-cross-bin
    
      3pkgver=11.2.1
    
      4pkgrel=1
    
      5pkgdesc="Prebuilt musl cross compiler toolchain (x86_64-linux-musl) from musl.cc"
    
      6arch=('x86_64')
    
      7url="https://musl.cc"
    
      8license=('MIT')
    
      9makedepends=('coreutils' 'tar' 'gzip')
    
      10depends=()
    
      11provides=('musl-cross')
    
      12conflicts=()
    
      13source=("https://more.musl.cc/${pkgver}/x86_64-linux-musl/x86_64-linux-musl-cross.tgz")
    
      14sha256sums=('SKIP')
    
      15
    
      16package() {
    
      17  install -dm755 "${pkgdir}/opt/cross/x86_64-linux-musl-cross"
    
      18  tar -xzf "${srcdir}/x86_64-linux-musl-cross.tgz" \
    
      19      -C "${pkgdir}/opt/cross/"
    
      20}
    
      21

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