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CVE-2021-41617 is a privilege-escalation vulnerability in sshd in OpenSSH 6.2 through 8.x before 8.8. Under certain non-default configurations, sshd does not initialize supplemental groups as expected. As a result, helper programs invoked via AuthorizedKeysCommand or AuthorizedPrincipalsCommand can execute with unintended group privileges inherited from the sshd process when the configuration specifies that the command should run as a different user. This creates a privilege boundary failure in which the helper process may retain access associated with sshd's group memberships rather than being fully constrained to the target account's intended privileges.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.