Unrated severityNVD Advisory· Published Jun 30, 1998· Updated Jun 16, 2026

CVE-1999-1150

Description

Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.

Affected products

Livingston Portmaster/Portmasterllm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- cpe:2.3:h:livingston_portmaster:portmaster:initial:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

www.securityfocus.com/archive/1/9723nvdVendor Advisory
exchange.xforce.ibmcloud.com/vulnerabilities/1882nvd

News mentions

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