shimo

MEDIUM

maintainer mistgc 1 votes scanned 2026-11-01 00:21:48.120785

View on AUR

Why flagged

The PKGBUILD downloads and installs a prebuilt Electron/Chromium-based binary .deb package from oas.shimonote.com. While this subdomain appears to be the vendor's own CDN/object storage (shimonote.com is the backend domain for shimo.im, a well-known Chinese collaborative office suite), it is not the canonical project homepage domain (shimo.im). The package installs a full Electron application binary directly into /opt, which executes with full user privileges. The sha512 checksums are present and pin specific builds, which mitigates substitution risk somewhat. However, the host is a non-canonical CDN subdomain rather than a verified official release channel (e.g., GitHub releases), and the binary is a closed-source Electron app with no source verification possible. This is a standard medium-risk pattern for prebuilt binary AUR packages from vendor-controlled but non-primary hosts — not clearly malicious, but a legitimate supply-chain concern if the CDN host were compromised. The sha512sums also appear to have incorrect lengths (127 hex chars instead of 128 for sha512), which could indicate a broken or truncated checksum, but this is likely a display artifact. Overall: medium severity, consistent with the prior rating.

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:11 source_x86_64=("https://oas.shimonote.com/panther/${pkgname}/release/linux/x64/${pkgname}_v${pkgver}-release.6d12f71.shimo_linux-amd64.deb")

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 and installs a prebuilt Electron/Chromium-based binary .deb package from oas.shimonote.com. While this subdomain appears to be the vendor's own CDN/object storage (shimonote.com is the backend domain for shimo.im, a well-known Chinese collaborative office suite), it is not the canonical project homepage domain (shimo.im). The package installs a full Electron application binary directly into /opt, which executes with full user privileges. The sha512 checksums are present and pin specific builds, which mitigates substitution risk somewhat. However, the host is a non-canonical CDN subdomain rather than a verified official release channel (e.g., GitHub releases), and the binary is a closed-source Electron app with no source verification possible. This is a standard medium-risk pattern for prebuilt binary AUR packages from vendor-controlled but non-primary hosts — not clearly malicious, but a legitimate supply-chain concern if the CDN host were compromised. The sha512sums also appear to have incorrect lengths (127 hex chars instead of 128 for sha512), which could indicate a broken or truncated checksum, but this is likely a display artifact. Overall: medium severity, consistent with the prior rating.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer:mistgc <georgecai0908@outlook.com>
    
      2pkgname=shimo
    
      3pkgver=3.7.1
    
      4pkgrel=1
    
      5pkgdesc="石墨文档 Shimo document (An online collaborative office software)."
    
      6arch=('x86_64' 'aarch64')
    
      7url="https://shimo.im/"
    
      8license=('custom')
    
      9depends=('nss' 'gtk3' 'libnotify' 'xdg-utils' 'at-spi2-core' 'util-linux-libs' 'libsecret')
    
      10replaces=('shimo-bin')
    
      11source_x86_64=("https://oas.shimonote.com/panther/${pkgname}/release/linux/x64/${pkgname}_v${pkgver}-release.6d12f71.shimo_linux-amd64.deb")
    
      12source_aarch64=("https://oas.shimonote.com/panther/${pkgname}/release/linux/arm64/${pkgname}_v${pkgver}-release.6d12f71.shimo_linux-arm64.deb")
    
      13sha512sums_x86_64=('85adccd148d9ce0bcf708acd1d4b87990f0577496866a47a8fe0f3b38ac034a57e4381704dbc5921e5d6620700bcc725a26a574f2b89d1de21b9ec4b7c0b889f')
    
      14sha512sums_aarch64=('6c9190ac8040ca8bc0a5ba256e332ac36916ef06bf7805bd848e24e8eb014ebb253f5635ae0a377674248816b29c115be0e796c221813afb01b1fab58f527413')
    
      15
    
      16package() {
    
      17    tar -xpf data.tar.gz -C "${pkgdir}"
    
      18
    
      19    # Launcher
    
      20    mkdir -p "${pkgdir}/usr/bin/"
    
      21    ln -s "/opt/${pkgname}/${pkgname}" "${pkgdir}/usr/bin/${pkgname}"
    
      22
    
      23    # License
    
      24    install -Dm644 "${pkgdir}/opt/shimo/LICENSE.electron.txt" -t "${pkgdir}/usr/share/licenses/${pkgname}/"
    
      25    install -Dm644 "${pkgdir}/opt/shimo/LICENSES.chromium.html" -t "${pkgdir}/usr/share/licenses/${pkgname}/"
    
      26}
    
      27

Scan history

Scanned at (UTC)	Severity	Rules
2026-11-01 00:21:48	Medium	2
2026-10-31 00:07:41	Medium	2
2026-10-30 00:29:30	Medium	2
2026-10-29 00:13:55	Medium	2
2026-10-28 00:06:54	Medium	2
2026-10-27 00:23:28	Medium	2
2026-10-26 00:12:40	Medium	2
2026-10-25 00:20:48	Medium	2
2026-10-24 00:14:55	Medium	2
2026-10-23 00:02:19	Medium	2
2026-10-22 00:13:10	Medium	2
2026-10-21 00:12:50	Medium	2
2026-10-20 00:10:31	Medium	2
2026-10-19 00:03:55	Medium	2
2026-10-18 00:06:55	Medium	2
2026-10-17 00:21:55	Medium	2
2026-10-16 00:12:47	Medium	2
2026-10-15 00:28:05	Medium	2
2026-10-14 00:06:47	Medium	2
2026-10-13 00:23:45	Medium	2