CVE-1999-0077

Windows NT - Predictable TCP Sequence Number Spoofing

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-0077.

AI-analyzed exploit summary The vulnerability involves a weakness in the Linux kernel's TCP sequence number generation, specifically in the 'secure_tcp_sequence_number' function in 'drivers/char/random.c'. This flaw allows remote attackers to predict initial sequence numbers, facilitating TCP session spoofing and bypassing IP-based access controls.

Description

Predictable TCP sequence numbers allow spoofing.

Exploits (1)

exploitdb WRITEUP
remotelinux
https://www.exploit-db.com/exploits/19522

The vulnerability involves a weakness in the Linux kernel's TCP sequence number generation, specifically in the 'secure_tcp_sequence_number' function in 'drivers/char/random.c'. This flaw allows remote attackers to predict initial sequence numbers, facilitating TCP session spoofing and bypassing IP-based access controls.

Classification
Writeup 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Theoretical
Target: Linux kernel (versions affected by CVE-1999-0077)
No auth needed
Prerequisites: Network access to the target system · Ability to observe or interact with TCP sessions
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/139

Scores

EPSS 0.3087
EPSS Percentile 98.0%

Details

Status published
Products (1)
microsoft/windows_nt 4.0
Published Jan 01, 1995
Tracked Since Feb 18, 2026