Security readout for executives and security teams
A very old flaw in Linux 2.2.x kernels lets a remote attacker sneak UDP network traffic through a Linux gateway that is sharing one internet connection with internal machines (IP masquerading). By faking the source address and port of an existing connection, the attacker can reach internal systems that should be hidden. It only matters if you still run a Linux 2.2.x gateway. Extremely narrow today. Only Linux systems still running 2.2.x kernels configured as IP masquerading (NAT) gateways with UDP services traversing them would be exposed. Such systems are effectively end-of-life and should not exist in supported production estates. Low priority for modern environments; only relevant if legacy Linux 2.2.x masquerading gateways remain in production, which warrants urgent retirement. Mitigation focus: Upgrade any Linux 2.2.x host to a supported modern kernel and distribution.; If upgrade is impossible, apply SUSE/vendor kernel updates that address the 2.2.15 fix line.; Restrict UDP services traversing legacy masquerading gateways with strict firewall rules..
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-2000-0289 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
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- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
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Source materials
- CVE List V5 sourceCVE List V5
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CWE details
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