CVEvulnerability

CVE-2006-1242

5.0 MEDIUM Published 2006-03-15 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2006-03-15
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N

Description

The ip_push_pending_frames function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan (nmap -sI) attack, which bypasses intended protections against such attacks.

Affected configurations

• linux linux kernel 2.4.0 • linux linux kernel 2.4.1 • linux linux kernel 2.4.2 • linux linux kernel 2.4.3 • linux linux kernel 2.4.4 • linux linux kernel 2.4.5 • linux linux kernel 2.4.6 • linux linux kernel 2.4.7 • linux linux kernel 2.4.8 • linux linux kernel 2.4.9 • linux linux kernel 2.4.10 • linux linux kernel 2.4.11 • linux linux kernel 2.4.12 • linux linux kernel 2.4.13 • linux linux kernel 2.4.14 • linux linux kernel 2.4.15 • linux linux kernel 2.4.16 • linux linux kernel 2.4.17 • linux linux kernel 2.4.18 • linux linux kernel 2.4.19 • linux linux kernel 2.4.20 • linux linux kernel 2.4.21 • linux linux kernel 2.4.22 • linux linux kernel 2.4.23 • linux linux kernel 2.4.23 ow2 • linux linux kernel 2.4.24 • linux linux kernel 2.4.24 ow1 • linux linux kernel 2.4.25 • linux linux kernel 2.4.26 • linux linux kernel 2.4.27 • linux linux kernel 2.4.28 • linux linux kernel 2.4.29 • linux linux kernel 2.4.30 • linux linux kernel 2.4.31 • linux linux kernel 2.4.32 • linux linux kernel 2.4.33 • linux linux kernel 2.6.0 • linux linux kernel 2.6.1 • linux linux kernel 2.6.2 • linux linux kernel 2.6.3 • linux linux kernel 2.6.4 • linux linux kernel 2.6.5 • linux linux kernel 2.6.6 • linux linux kernel 2.6.7 • linux linux kernel 2.6.8 • linux linux kernel 2.6.9 • linux linux kernel 2.6.10 • linux linux kernel 2.6.11 • linux linux kernel 2.6.11.5 • linux linux kernel 2.6.11.6 • linux linux kernel 2.6.11.7 • linux linux kernel 2.6.11.8 • linux linux kernel 2.6.11.11 • linux linux kernel 2.6.11.12 • linux linux kernel 2.6.12 • linux linux kernel 2.6.12.1 • linux linux kernel 2.6.12.2 • linux linux kernel 2.6.12.3 • linux linux kernel 2.6.12.4 • linux linux kernel 2.6.12.5 … and 19 more

References