xlibre-server-xephyr-bin

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

MEDIUM

Why flagged This PKGBUILD downloads a prebuilt binary package (a compiled X server component) from x11libre.net, which is not an established, widely-trusted infrastructure host like GitHub releases, GitLab, or a major Linux distribution mirror. XLibre is a real fork of X.Org (announced in 2025 as a response to X.Org governance concerns), and x11libre.net appears to be its official project website, so this is not a random personal host. However, the package installs a prebuilt binary directly extracted from a .pkg.tar.zst archive into the system, bypassing normal build-from-source verification. The sha256sum is present but cannot be independently verified against a separate upstream manifest or signature. The risk is real but not clearly malicious: if x11libre.net were compromised or the maintainer of this AUR package substituted a different binary, it would result in execution of arbitrary code with X server privileges. This fits the medium category — an executed binary from a non-mainstream host with no additional integrity verification (e.g., PGP signature check).

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:28 source=(https://x11libre.net/repo/arch_based/x86_64/xlibre-xserver-xephyr-25.0.0.21-1-x86_64.pkg.tar.zst)

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 72%): This PKGBUILD downloads a prebuilt binary package (a compiled X server component) from x11libre.net, which is not an established, widely-trusted infrastructure host like GitHub releases, GitLab, or a major Linux distribution mirror. XLibre is a real fork of X.Org (announced in 2025 as a response to X.Org governance concerns), and x11libre.net appears to be its official project website, so this is not a random personal host. However, the package installs a prebuilt binary directly extracted from a .pkg.tar.zst archive into the system, bypassing normal build-from-source verification. The sha256sum is present but cannot be independently verified against a separate upstream manifest or signature. The risk is real but not clearly malicious: if x11libre.net were compromised or the maintainer of this AUR package substituted a different binary, it would result in execution of arbitrary code with X server privileges. This fits the medium category — an executed binary from a non-mainstream host with no additional integrity verification (e.g., PGP signature check).

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: artist for Xlibre
    
      2
    
      3_pkgname=xlibre-server-xephyr
    
      4_orgpkgname=xlibre-xserver-xephyr
    
      5pkgname=$_pkgname-bin
    
      6pkgver=25.0.0.21
    
      7pkgrel=1
    
      8pkgdesc="XLibre Official Easy Install Drop in Replacement fork of X.Org nested X server that runs as an X application (binary release)"
    
      9arch=(x86_64)
    
      10url=https://x11libre.net/repo/arch_based/x86_64
    
      11license=('LicenseRef-Adobe-Display-PostScript'
    
      12         'BSD-3-Clause'
    
      13         'LicenseRef-DEC-3-Clause'
    
      14         'HPND'
    
      15         'LicenseRef-HPND-sell-MIT-disclaimer-xserver'
    
      16         'HPND-sell-variant'
    
      17         'ICU'
    
      18         'ISC'
    
      19         'MIT'
    
      20         'MIT-open-group'
    
      21         'NTP'
    
      22         'SGI-B-2.0'
    
      23         'SMLNJ'
    
      24         'X11'
    
      25         'X11-distribute-modifications-variant')
    
      26groups=('xlibre')
    
      27options=(!strip)
    
      28source=(https://x11libre.net/repo/arch_based/x86_64/xlibre-xserver-xephyr-25.0.0.21-1-x86_64.pkg.tar.zst)
    
      29noextract=("${_pkgname}-${pkgver}-${pkgrel}-x86_64.pkg.tar.zst")
    
      30depends=(xlibre-server-common-bin 'X-ABI-XINPUT_VERSION=26.0' libxfont2 libgl libepoxy libunwind
    
      31         xcb-util-image xcb-util-renderutil xcb-util-wm xcb-util-keysyms pixman
    
      32         nettle libtirpc xcb-util libxdmcp libx11 libxau libxshmfence glibc)
    
      33provides=($_pkgname 'xorg-server-xephyr' 'xlibre-server-xephyr')
    
      34conflicts=($_pkgname 'xorg-server-xephyr' 'xlibre-server-xephyr')
    
      35
    
      36sha256sums=('b00d3adba4c1035527ea4431aa84fefb34849b9aa4bae594582ff4b2b9100da3')
    
      37
    
      38package() {
    
      39  tar -xf "${_orgpkgname}-${pkgver}-${pkgrel}-x86_64.pkg.tar.zst" -C "${pkgdir}" usr
    
      40}
    
      41
    
      42

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