csky-debugserver-bin

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

MEDIUM

Why flagged The PKGBUILD downloads a self-extracting shell installer from Alibaba Cloud OSS (occ-oss-prod.oss-cn-hangzhou.aliyuncs.com), which is the official T-Head/XuanTie distribution channel for RISC-V tooling from Alibaba's chip division. The technique of using `tail -n +285` to strip the shell header and extract an embedded tarball is a standard self-extracting installer pattern. The host is not a random personal bucket — it is the official OCC (Open Chip Community) production OSS bucket used by T-Head Semiconductor for all their toolchain releases, consistent with the upstream URL pointing to xrvm.cn. SHA256 checksums are provided and pinned. However, the binary payload is a prebuilt closed-source ELF debugserver that cannot be independently verified against source code, and the distribution host, while official for this vendor, is not a well-known tier-1 mirror. This is a legitimate medium-risk supply-chain concern (prebuilt binary from a vendor-controlled but non-mainstream host) rather than a clear attack, and the sha256 pinning mitigates substitution risk at the point of download.

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:29 "${pkgname}-${pkgver}.sh.tar.gz::https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource//1732244327178/XuanTie-DebugServer-linux-x86_64-V5.18.3-20241119.sh.tar.gz"

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 self-extracting shell installer from Alibaba Cloud OSS (occ-oss-prod.oss-cn-hangzhou.aliyuncs.com), which is the official T-Head/XuanTie distribution channel for RISC-V tooling from Alibaba's chip division. The technique of using `tail -n +285` to strip the shell header and extract an embedded tarball is a standard self-extracting installer pattern. The host is not a random personal bucket — it is the official OCC (Open Chip Community) production OSS bucket used by T-Head Semiconductor for all their toolchain releases, consistent with the upstream URL pointing to xrvm.cn. SHA256 checksums are provided and pinned. However, the binary payload is a prebuilt closed-source ELF debugserver that cannot be independently verified against source code, and the distribution host, while official for this vendor, is not a well-known tier-1 mirror. This is a legitimate medium-risk supply-chain concern (prebuilt binary from a vendor-controlled but non-mainstream host) rather than a clear attack, and the sha256 pinning mitigates substitution risk at the point of download.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: taotieren <admin@taotieren.com>
    
      2
    
      3pkgname=csky-debugserver-bin
    
      4pkgver=5.18.3
    
      5pkgrel=2
    
      6epoch=
    
      7pkgdesc="C-Sky Debugger Server"
    
      8arch=('x86_64')
    
      9url="https://www.xrvm.cn/community/download?id=4380347564587814912"
    
      10license=('BSD')
    
      11groups=()
    
      12depends=(
    
      13    sh
    
      14    gcc-libs
    
      15    glibc
    
      16    libusb
    
      17)
    
      18makedepends=(libarchive)
    
      19checkdepends=()
    
      20optdepends=()
    
      21provides=()
    
      22conflicts=()
    
      23replaces=()
    
      24backup=()
    
      25options=(!strip !debug)
    
      26install=
    
      27changelog=
    
      28source=(
    
      29    "${pkgname}-${pkgver}.sh.tar.gz::https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource//1732244327178/XuanTie-DebugServer-linux-x86_64-V5.18.3-20241119.sh.tar.gz"
    
      30    "DebugServer User Guide_v5.18.pdf::https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource//1732244783846/Debugger+Server+User+Guide%28ZH-CN%29_20241122.pdf"
    
      31)
    
      32noextract=()
    
      33sha256sums=('7f4de8c22050a8a591677b4cb5d783b47e53c213fd5fd5c2d93952704c578bfc'
    
      34            'e6161264c76f5028b55e34d48cbcaeb21829d73dbe94548cdb7b55f1d87de4b9')
    
      35#validpgpkeys=()
    
      36
    
      37package() {
    
      38    tail -n +285 "${srcdir}"/*${pkgver}*.sh >"${srcdir}/${pkgname}-${pkgver}.tar.gz"
    
      39
    
      40    install -dm0755 "${pkgdir}/opt/t-head/${pkgname%-bin}"
    
      41
    
      42    bsdtar -xf "${srcdir}/${pkgname}-${pkgver}.tar.gz" --no-same-owner --no-same-permissions --strip-components=1 -C "${pkgdir}/opt/t-head/${pkgname%-bin}"
    
      43
    
      44    install -Dm0644 "${srcdir}"/*.pdf -t "${pkgdir}/opt/t-head/${pkgname%-bin}"
    
      45
    
      46    #     install -Dm0644 /dev/stdin "${pkgdir}/etc/profile.d/${pkgname%-bin}.csh" <<EOF
    
      47    # setenv PATH "${PATH}:/opt/t-head/${pkgname%-bin}"
    
      48    # EOF
    
      49
    
      50    install -Dm0755 /dev/stdin "${pkgdir}/usr/bin/${pkgname%-bin}" <<EOF
    
      51#!/bin/env bash
    
      52export PATH=/opt/t-head/${pkgname%-bin}:\$PATH
    
      53cd /opt/t-head/${pkgname%-bin}
    
      54exec DebugServerConsole.elf "\$@"
    
      55EOF
    
      56}
    
      57

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