FrSIRT - Linux Kernel "ip_push_pending_frames" Remote Security Bypass Vulnerability / Exploit (Security Advisories)

French Security Incident Response Team

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Linux Kernel "ip_push_pending_frames" Remote Security Bypass Vulnerability

Title : Linux Kernel "ip_push_pending_frames" Remote Security Bypass Vulnerability
Advisory ID : FrSIRT/ADV-2006-1140
CVE ID : CVE-2006-1242
Rated as : Low Risk

Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-03-29

Advisory Details

Description

Affected Products

Solution

References

Technical Description

A vulnerability has been identified in Linux Kernel, which could be exploited by remote attackers to bypass security restrictions. This flaw is due to an error in the "ip_push_pending_frames()" function that incorrectly increments the IP ID field when processing unsolicited SYN/ACK packets, which could be exploited by remote attackers to conduct an Idle Scan (nmap -sI) attacks.

Credits

Vulnerability reported by Marco Ivaldi

ChangeLog

2006-03-29 : Initial release

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