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CVE-2019-3842 is an incorrect-authorization vulnerability in systemd before v242-rc4 affecting the pam_systemd PAM module. pam_systemd did not adequately sanitize the XDG_SEAT environment variable before consuming it. A local unprivileged user could spoof this value in particular PAM and session configurations, causing polkit authorization checks to evaluate commands using the allow_active policy element rather than allow_any. This can enable local privilege escalation when the required session conditions are present.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A systemd authorization-bypass/spoofing vulnerability involving the XDG_SEAT environment value, which can cause actions to be checked against the less restrictive allow_active policy rather than allow_any.
Unknown
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A systemd authorization-bypass/spoofing flaw in which an attacker-controlled XDG_SEAT value can cause actions to be checked against the less restrictive "allow_active" authorization condition rather than "allow_any".
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.