Security readout for executives and security teams
This old OpenSSH flaw let an already authenticated SFTP user bypass command restrictions tied to restricted SSH keypairs. It matters mainly where legacy OpenSSH systems used keys to confine users to specific commands or workflows. Exposure is limited to very old OpenSSH deployments before 2.9.9 that enabled sftp-server and relied on authorized_keys2 command= restrictions for confined access. Modern maintained OpenSSH installations are unlikely to be affected, but legacy embedded or unmanaged Unix/Linux hosts deserve review. Prioritize only if the organization still operates legacy OpenSSH or appliances derived from old Unix/Linux distributions. The business risk is unauthorized action by trusted or compromised restricted SFTP users, not unauthenticated internet-wide takeover. Mitigation focus: Upgrade affected OpenSSH installations to vendor-fixed packages or OpenSSH 2.9.9 or later.; Remove or disable SFTP access for restricted-key accounts until upgraded.; Do not rely on authorized_keys2 command= restrictions as the only control on vulnerable systems..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2001-0816 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- openssh-sftp-bypass-restrictions(7634)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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