kontur-diag-plugin

maintainer komex · 2 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The PKGBUILD downloads a prebuilt RPM binary from api.kontur.ru (SKB Kontur's own API/CDN endpoint) and installs its contents, including executables under /opt set to mode 755. SKB Kontur is a legitimate Russian software company providing cryptographic/PKI services, and api.kontur.ru is their official distribution endpoint, not a personal or unofficial host. However, the package installs prebuilt binaries (browser extension native host / cryptographic library) without source, relying solely on a sha256 checksum for integrity. The checksum provides some protection against transit tampering but not against a compromised upstream host silently replacing the file. The install logic (find+grep+sed+xargs) is unusual but functional — it installs everything except lib64 paths and then chmod 755s everything under /opt, which is a reasonable way to unpack an RPM without rpmextract. This is a genuine medium-risk pattern: executed proprietary binaries from a vendor API endpoint with no source transparency, but not clearly malicious.

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:15 source=("https://api.kontur.ru/drive/v1/public/diag/files/diag.plugin-${pkgver}-${pkgrel}.${arch}.${_patch}.rpm")

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 RPM binary from api.kontur.ru (SKB Kontur's own API/CDN endpoint) and installs its contents, including executables under /opt set to mode 755. SKB Kontur is a legitimate Russian software company providing cryptographic/PKI services, and api.kontur.ru is their official distribution endpoint, not a personal or unofficial host. However, the package installs prebuilt binaries (browser extension native host / cryptographic library) without source, relying solely on a sha256 checksum for integrity. The checksum provides some protection against transit tampering but not against a compromised upstream host silently replacing the file. The install logic (find+grep+sed+xargs) is unusual but functional — it installs everything except lib64 paths and then chmod 755s everything under /opt, which is a reasonable way to unpack an RPM without rpmextract. This is a genuine medium-risk pattern: executed proprietary binaries from a vendor API endpoint with no source transparency, but not clearly malicious.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Lionel Miller <delonorm at gmail dot com>
    
      2# Maintainer: Andrey Kolchenko <andrey@kolchenko.me>
    
      3
    
      4pkgname=kontur-diag-plugin
    
      5pkgver=3.1.2.373
    
      6pkgrel=1
    
      7pkgdesc="Diag.Plugin is an extension for web browsers that allows users to install cryptographic programs for SKB Kontur services."
    
      8arch=('x86_64')
    
      9license=('proprietary')
    
      10depends=('gtk3')
    
      11makedepends=('findutils' 'grep' 'sed' 'coreutils')
    
      12url='https://help.kontur.ru/'
    
      13
    
      14_patch='001814'
    
      15source=("https://api.kontur.ru/drive/v1/public/diag/files/diag.plugin-${pkgver}-${pkgrel}.${arch}.${_patch}.rpm")
    
      16sha256sums=('ed1ae3c20ae8dd8c1c52fe86b1d8dc132f0918fd061debe87dff057b26fdd849')
    
      17
    
      18package() {
    
      19	find "${srcdir}" -type f | grep -v lib64 | sed -e "s#${srcdir}/##g" | xargs -I{} install -Dvm644 "${srcdir}/{}" "${pkgdir}/{}"
    
      20	find "${pkgdir}/opt" -type f | xargs chmod 755
    
      21}
    
      22
    
      23

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