Connection interruption via NAT sequence-number leakage
Published May 28, 2024 · Updated Feb 13, 2025
TCP session hijacking in Ruijie EG210G-P, EG105G-V2, NBR, and EG105G routers allows attackers to interrupt active connections. NAT port preservation reveals whether a client has an active TCP flow, while insufficient reverse-path validation and disabled TCP window tracking let forged packets replace the original NAT mapping. The attacker must reach the same Wi-Fi network; the replacement mapping exposes live sequence and acknowledgment numbers that enable a forced connection close.
Summary
What happened
TCP session hijacking in Ruijie EG210G-P, EG105G-V2, NBR, and EG105G routers allows attackers to interrupt active connections. NAT port preservation reveals whether a client has an active TCP flow, while insufficient reverse-path validation and disabled TCP window tracking let forged packets replace the original NAT mapping. The attacker must reach the same Wi-Fi network; the replacement mapping exposes live sequence and acknowledgment numbers that enable a forced connection close.
The record
- CVE
- CVE-2023-30308
- Published
- May 28, 2024
- Updated
- Feb 13, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-203, T1498
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 28, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- NAT mapping replacement TCP-hijacking attackfunctional · demonstrated
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Technologies
Your stack
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Your stack
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