libximc7

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

MEDIUM

Why flagged The PKGBUILD downloads prebuilt binary .deb packages from download.ximc.ru, which is the official download server for XIMC (a Russian motion control hardware vendor, Standa/XIMC). The domain is the vendor's own distribution host, not a random personal server. However, the connection is plain HTTP (not HTTPS), meaning the download is vulnerable to MITM substitution of the binary despite the sha256sums providing post-download integrity verification. The package installs a shared library (libximc7) that will be loaded into user processes, so a compromised or substituted binary would result in code execution. There is no source build — only prebuilt binaries are distributed. The combination of: (1) prebuilt binary shared library, (2) plain HTTP transport (no TLS), and (3) no source availability constitutes a genuine medium-severity supply-chain concern. The checksums mitigate the MITM risk somewhat, but only if the PKGBUILD itself has not been tampered with. This is a legitimate vendor package distributed in an insecure manner, not clearly malicious, which fits the medium classification.

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_i686=("http://download.ximc.ru/libximc7/libximc7-${pkgver}-i386.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 prebuilt binary .deb packages from download.ximc.ru, which is the official download server for XIMC (a Russian motion control hardware vendor, Standa/XIMC). The domain is the vendor's own distribution host, not a random personal server. However, the connection is plain HTTP (not HTTPS), meaning the download is vulnerable to MITM substitution of the binary despite the sha256sums providing post-download integrity verification. The package installs a shared library (libximc7) that will be loaded into user processes, so a compromised or substituted binary would result in code execution. There is no source build — only prebuilt binaries are distributed. The combination of: (1) prebuilt binary shared library, (2) plain HTTP transport (no TLS), and (3) no source availability constitutes a genuine medium-severity supply-chain concern. The checksums mitigate the MITM risk somewhat, but only if the PKGBUILD itself has not been tampered with. This is a legitimate vendor package distributed in an insecure manner, not clearly malicious, which fits the medium classification.

PKGBUILD

1 offending line(s) highlighted

      1pkgname=libximc7
    
      2pkgver=2.9.7
    
      3pkgrel=1
    
      4pkgdesc="Library for controlling stepper and other motors.
    
      5It provides a simple C interface for controlling and configuring engine and controller.
    
      6It uses a common virtual serial port driver embedded in all OS."
    
      7arch=('i686' 'x86_64')
    
      8url="https://en.xisupport.com/projects/enxisupport/wiki/Software"
    
      9depends=('glibc>=2.14')
    
      10license=('custom')
    
      11source_i686=("http://download.ximc.ru/libximc7/libximc7-${pkgver}-i386.deb")
    
      12sha256sums_i686=('68eebf7075ce5466a4db4d522d555aa9f832ad44a0322af3c999931df31caff0')
    
      13source_x86_64=("http://download.ximc.ru/libximc7/libximc7-${pkgver}-amd64.deb")
    
      14sha256sums_x86_64=('fb69f4cedfc165e6e6f8101933d74fb5058a10c9ae7751b49ba444b0fe764bbc')
    
      15
    
      16package() {
    
      17  cd "${srcdir}"
    
      18
    
      19  tar -xzC "${pkgdir}" -f data.tar.gz
    
      20
    
      21  cp -r ${pkgdir}/lib ${pkgdir}/usr/
    
      22  rm -r ${pkgdir}/lib
    
      23}
    
      24

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