bittly

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

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt AppImage (an executable binary) from res.bittly.sigechen.com, which is a subdomain of the project's own domain (bittly.sigechen.com). This is a personal/small-vendor host rather than a major forge like GitHub releases, meaning there is no independent verification of the artifact's provenance. A sha256sum is provided, which mitigates substitution attacks at build time, but does not help if the upstream host was compromised before the checksum was recorded. AppImages are self-contained executables that run arbitrary code, so the impact of a compromised artifact is full RCE. The host appears to be the official project distribution server (same domain as the project URL), which reduces but does not eliminate the concern — it is not a clearly unofficial or personal third-party host. Overall this is a genuine medium-risk pattern: an executed binary from a small, unauditable vendor host with no independent mirror or reproducible build.

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 "${pkgname}-${pkgver}.AppImage"::"https://res.bittly.sigechen.com/download/${pkgver}/bittly-${pkgver}-x64.AppImage"

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 prebuilt AppImage (an executable binary) from res.bittly.sigechen.com, which is a subdomain of the project's own domain (bittly.sigechen.com). This is a personal/small-vendor host rather than a major forge like GitHub releases, meaning there is no independent verification of the artifact's provenance. A sha256sum is provided, which mitigates substitution attacks at build time, but does not help if the upstream host was compromised before the checksum was recorded. AppImages are self-contained executables that run arbitrary code, so the impact of a compromised artifact is full RCE. The host appears to be the official project distribution server (same domain as the project URL), which reduces but does not eliminate the concern — it is not a clearly unofficial or personal third-party host. Overall this is a genuine medium-risk pattern: an executed binary from a small, unauditable vendor host with no independent mirror or reproducible build.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: icepie <icepie.dev@gmail.com>
    
      2pkgname=bittly
    
      3pkgver=0.19.1
    
      4pkgrel=1
    
      5pkgdesc="不止是一个串口调试助手 (～￣▽￣)～"
    
      6arch=("x86_64")
    
      7url="https://bittly.sigechen.com"
    
      8license=('custom')
    
      9depends=('c-ares' 'ffmpeg' 'gtk3' 'libevent' 'libxslt' 'minizip' 'nss' 're2' 'snappy' 'fuse2')
    
      10source=(
    
      11	"${pkgname}-${pkgver}.AppImage"::"https://res.bittly.sigechen.com/download/${pkgver}/bittly-${pkgver}-x64.AppImage"
    
      12	"bittly.desktop"
    
      13	"bittly.svg")
    
      14sha256sums=(
    
      15	'4608abc2da4cb74223391faae3b9b3aa3c0715c41fd06c7eb47b4cd1f316c274'
    
      16	'0b9dbfae82faceb33c027d0686a21d14a3c50b04065458799d2ebe9df87edd03'
    
      17	'a39dfb8e7dc3466c184cc564c3c8d341c5f38065fe46533d1c59620c4273ccd9')
    
      18options=(!strip)
    
      19
    
      20package() {
    
      21	install -Dm755 "${srcdir}/bittly-${pkgver}.AppImage" "${pkgdir}/opt/bittly/bittly.AppImage"
    
      22	install -Dm644 "${srcdir}/bittly.desktop" "${pkgdir}/usr/share/applications/bittly.desktop"
    
      23	# install -Dm644 "${srcdir}/bittly.svg" "${pkgdir}/usr/share/icons/bittly.svg"
    
      24	install -Dm644 "${srcdir}/bittly.svg" "${pkgdir}/usr/share/icons/hicolor/scalable/apps/bittly.svg"
    
      25	
    
      26	mkdir -p "${pkgdir}/usr/bin"
    
      27	ln -sf "${pkgdir}/opt/bittly/bittly.AppImage" "${pkgdir}/usr/bin"
    
      28}
    
      29

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