kibo-appimage

maintainer Cleboost · 1 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD installs a prebuilt AppImage binary from apk.kiboanime.app, which is a project-controlled but non-standard subdomain host. The AppImage is an executable binary that runs directly on the user's system (via fuse2), making it a full code-execution artifact. While sha256sums are present and verified, they only protect against transit corruption/substitution — if the upstream host (apk.kiboanime.app) were compromised or the maintainer pushed a new version without updating checksums, users would receive unvetted executable code. The domain is not a well-known, audited distribution channel (like GitHub releases or a major distro mirror). The .desktop file is pulled from a personal GitHub repo (Cleboost/missing-aur) rather than the upstream project itself, adding another trust boundary. This is a classic medium-severity supply-chain concern: not clearly malicious, but a prebuilt binary from an unofficial/project-owned subdomain with no source build path.

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:12 "${pkgname}-${pkgver}.AppImage::https://apk.kiboanime.app/downloadpc/Kibo-${pkgver}.AppImage"
PKGBUILD:13 "kibo.svg::https://www.kiboanime.app/group-2.svg"

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 installs a prebuilt AppImage binary from apk.kiboanime.app, which is a project-controlled but non-standard subdomain host. The AppImage is an executable binary that runs directly on the user's system (via fuse2), making it a full code-execution artifact. While sha256sums are present and verified, they only protect against transit corruption/substitution — if the upstream host (apk.kiboanime.app) were compromised or the maintainer pushed a new version without updating checksums, users would receive unvetted executable code. The domain is not a well-known, audited distribution channel (like GitHub releases or a major distro mirror). The .desktop file is pulled from a personal GitHub repo (Cleboost/missing-aur) rather than the upstream project itself, adding another trust boundary. This is a classic medium-severity supply-chain concern: not clearly malicious, but a prebuilt binary from an unofficial/project-owned subdomain with no source build path.

PKGBUILD

2 offending line(s) highlighted

      1pkgname=kibo-appimage
    
      2pkgver=1.1.7
    
      3pkgrel=2
    
      4pkgdesc="Kibo Anime AppImage - Application for watching anime"
    
      5arch=('x86_64')
    
      6url="https://kiboanime.app"
    
      7license=('custom')
    
      8depends=('fuse2')
    
      9options=(!strip)
    
      10
    
      11source=(
    
      12  "${pkgname}-${pkgver}.AppImage::https://apk.kiboanime.app/downloadpc/Kibo-${pkgver}.AppImage"
    
      13  "kibo.svg::https://www.kiboanime.app/group-2.svg"
    
      14  "kibo.desktop::https://raw.githubusercontent.com/Cleboost/missing-aur/main/kibo/kibo.desktop"
    
      15)
    
      16
    
      17sha256sums=('389bde34622f5b8469ad72ca7d26ff0de60012981bf9876a80cfa2c57a0a5b7d'
    
      18            'bbe7aef71d090ed5eabc7b2933431990ce8e5253ea3123d3695cd2264434bbd6'
    
      19            '3f3472b09fa34c77f238efa75ea8da528c969ef67e7ec062699f97f5c90533aa')
    
      20
    
      21prepare() {
    
      22  chmod +x "${srcdir}/${pkgname}-${pkgver}.AppImage"
    
      23}
    
      24
    
      25package() {
    
      26  install -Dm755 \
    
      27    "${srcdir}/${pkgname}-${pkgver}.AppImage" \
    
      28    "${pkgdir}/opt/${pkgname}/kibo.AppImage"
    
      29
    
      30  install -dm755 "${pkgdir}/usr/bin"
    
      31  ln -sf "/opt/${pkgname}/kibo.AppImage" "${pkgdir}/usr/bin/kibo"
    
      32
    
      33  install -Dm644 \
    
      34    "${srcdir}/kibo.svg" \
    
      35    "${pkgdir}/usr/share/icons/hicolor/scalable/apps/kibo.svg"
    
      36
    
      37  install -Dm644 \
    
      38    "${srcdir}/kibo.desktop" \
    
      39    "${pkgdir}/usr/share/applications/kibo.desktop"
    
      40
    
      41  install -Dm644 /dev/stdin \
    
      42    "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE" <<'EOF'
    
      43This package redistributes the Kibo Anime AppImage.
    
      44
    
      45Upstream project:
    
      46https://kiboanime.app
    
      47
    
      48License terms and conditions are provided by the upstream project.
    
      49EOF
    
      50}
    
      51

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