Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2006-1242

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.

Security Impact Summary

CVE-2006-1242 is a security vulnerability that . Impacting 1 product from linux organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2006, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2006-03-15T17:06:00.000

Last Modified

2026-04-16T00:27:16.627

Status

Modified

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.0	Yes
Operating System	linux	linux_kernel	2.4.1	Yes
Operating System	linux	linux_kernel	2.4.2	Yes
Operating System	linux	linux_kernel	2.4.3	Yes
Operating System	linux	linux_kernel	2.4.4	Yes
Operating System	linux	linux_kernel	2.4.5	Yes
Operating System	linux	linux_kernel	2.4.6	Yes
Operating System	linux	linux_kernel	2.4.7	Yes
Operating System	linux	linux_kernel	2.4.8	Yes
Operating System	linux	linux_kernel	2.4.9	Yes
Operating System	linux	linux_kernel	2.4.10	Yes
Operating System	linux	linux_kernel	2.4.11	Yes
Operating System	linux	linux_kernel	2.4.12	Yes
Operating System	linux	linux_kernel	2.4.13	Yes
Operating System	linux	linux_kernel	2.4.14	Yes
Operating System	linux	linux_kernel	2.4.15	Yes
Operating System	linux	linux_kernel	2.4.16	Yes
Operating System	linux	linux_kernel	2.4.17	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.18	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.19	Yes
Operating System	linux	linux_kernel	2.4.20	Yes
Operating System	linux	linux_kernel	2.4.21	Yes
Operating System	linux	linux_kernel	2.4.21	Yes
Operating System	linux	linux_kernel	2.4.21	Yes
Operating System	linux	linux_kernel	2.4.21	Yes
Operating System	linux	linux_kernel	2.4.22	Yes
Operating System	linux	linux_kernel	2.4.23	Yes
Operating System	linux	linux_kernel	2.4.23	Yes
Operating System	linux	linux_kernel	2.4.23_ow2	Yes
Operating System	linux	linux_kernel	2.4.24	Yes
Operating System	linux	linux_kernel	2.4.24_ow1	Yes
Operating System	linux	linux_kernel	2.4.25	Yes
Operating System	linux	linux_kernel	2.4.26	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.27	Yes
Operating System	linux	linux_kernel	2.4.28	Yes
Operating System	linux	linux_kernel	2.4.29	Yes
Operating System	linux	linux_kernel	2.4.29	Yes
Operating System	linux	linux_kernel	2.4.29	Yes
Operating System	linux	linux_kernel	2.4.30	Yes
Operating System	linux	linux_kernel	2.4.30	Yes
Operating System	linux	linux_kernel	2.4.30	Yes
Operating System	linux	linux_kernel	2.4.31	Yes
Operating System	linux	linux_kernel	2.4.31	Yes
Operating System	linux	linux_kernel	2.4.32	Yes
Operating System	linux	linux_kernel	2.4.32	Yes
Operating System	linux	linux_kernel	2.4.32	Yes
Operating System	linux	linux_kernel	2.4.33	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.0	Yes
Operating System	linux	linux_kernel	2.6.1	Yes
Operating System	linux	linux_kernel	2.6.1	Yes
Operating System	linux	linux_kernel	2.6.1	Yes
Operating System	linux	linux_kernel	2.6.2	Yes
Operating System	linux	linux_kernel	2.6.3	Yes
Operating System	linux	linux_kernel	2.6.4	Yes
Operating System	linux	linux_kernel	2.6.5	Yes
Operating System	linux	linux_kernel	2.6.6	Yes
Operating System	linux	linux_kernel	2.6.6	Yes
Operating System	linux	linux_kernel	2.6.7	Yes
Operating System	linux	linux_kernel	2.6.7	Yes
Operating System	linux	linux_kernel	2.6.8	Yes
Operating System	linux	linux_kernel	2.6.8	Yes
Operating System	linux	linux_kernel	2.6.8	Yes
Operating System	linux	linux_kernel	2.6.8	Yes
Operating System	linux	linux_kernel	2.6.9	Yes
Operating System	linux	linux_kernel	2.6.10	Yes
Operating System	linux	linux_kernel	2.6.10	Yes
Operating System	linux	linux_kernel	2.6.11	Yes
Operating System	linux	linux_kernel	2.6.11	Yes
Operating System	linux	linux_kernel	2.6.11	Yes
Operating System	linux	linux_kernel	2.6.11	Yes
Operating System	linux	linux_kernel	2.6.11.5	Yes
Operating System	linux	linux_kernel	2.6.11.6	Yes
Operating System	linux	linux_kernel	2.6.11.7	Yes
Operating System	linux	linux_kernel	2.6.11.8	Yes
Operating System	linux	linux_kernel	2.6.11.11	Yes
Operating System	linux	linux_kernel	2.6.11.12	Yes
Operating System	linux	linux_kernel	2.6.12	Yes
Operating System	linux	linux_kernel	2.6.12	Yes
Operating System	linux	linux_kernel	2.6.12	Yes
Operating System	linux	linux_kernel	2.6.12.1	Yes
Operating System	linux	linux_kernel	2.6.12.2	Yes
Operating System	linux	linux_kernel	2.6.12.3	Yes
Operating System	linux	linux_kernel	2.6.12.4	Yes
Operating System	linux	linux_kernel	2.6.12.5	Yes
Operating System	linux	linux_kernel	2.6.12.6	Yes
Operating System	linux	linux_kernel	2.6.13	Yes
Operating System	linux	linux_kernel	2.6.13	Yes
Operating System	linux	linux_kernel	2.6.13	Yes
Operating System	linux	linux_kernel	2.6.13	Yes
Operating System	linux	linux_kernel	2.6.13	Yes
Operating System	linux	linux_kernel	2.6.13.1	Yes
Operating System	linux	linux_kernel	2.6.13.2	Yes
Operating System	linux	linux_kernel	2.6.13.3	Yes
Operating System	linux	linux_kernel	2.6.13.4	Yes
Operating System	linux	linux_kernel	2.6.14	Yes
Operating System	linux	linux_kernel	2.6.14	Yes
Operating System	linux	linux_kernel	2.6.14	Yes
Operating System	linux	linux_kernel	2.6.14	Yes
Operating System	linux	linux_kernel	2.6.14	Yes
Operating System	linux	linux_kernel	2.6.14.1	Yes
Operating System	linux	linux_kernel	2.6.14.2	Yes
Operating System	linux	linux_kernel	2.6.14.3	Yes
Operating System	linux	linux_kernel	2.6.14.4	Yes
Operating System	linux	linux_kernel	2.6.14.5	Yes
Operating System	linux	linux_kernel	2.6.15	Yes
Operating System	linux	linux_kernel	2.6.15	Yes
Operating System	linux	linux_kernel	2.6.15	Yes
Operating System	linux	linux_kernel	2.6.15.1	Yes
Operating System	linux	linux_kernel	2.6.15.2	Yes
Operating System	linux	linux_kernel	2.6.15.3	Yes
Operating System	linux	linux_kernel	2.6.15.4	Yes
Operating System	linux	linux_kernel	2.6.15.5	Yes
Operating System	linux	linux_kernel	2.6_test9_cvs	Yes

References

http://secunia.com/advisories/19402 Patch, Vendor Advisory ([email protected])
http://secunia.com/advisories/19955 ([email protected])
http://secunia.com/advisories/20157 ([email protected])
http://secunia.com/advisories/20398 ([email protected])
http://secunia.com/advisories/20671 ([email protected])
http://secunia.com/advisories/20914 ([email protected])
http://secunia.com/advisories/21136 ([email protected])
http://secunia.com/advisories/21465 ([email protected])
http://secunia.com/advisories/21983 ([email protected])
http://secunia.com/advisories/22417 ([email protected])
http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm ([email protected])
http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm ([email protected])
http://www.debian.org/security/2006/dsa-1097 ([email protected])
http://www.debian.org/security/2006/dsa-1103 ([email protected])
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.1 ([email protected])
http://www.mandriva.com/security/advisories?name=MDKSA-2006:086 ([email protected])
http://www.novell.com/linux/security/advisories/2006-05-31.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2006-0437.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2006-0575.html ([email protected])
http://www.securityfocus.com/archive/1/427622/100/0/threaded ([email protected])
http://www.securityfocus.com/archive/1/427753/100/0/threaded ([email protected])
http://www.securityfocus.com/archive/1/427893/100/0/threaded ([email protected])
http://www.securityfocus.com/archive/1/428605/30/6210/threaded ([email protected])
http://www.securityfocus.com/bid/17109 ([email protected])
http://www.vupen.com/english/advisories/2006/1140 ([email protected])
http://www.vupen.com/english/advisories/2006/2554 ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10317 ([email protected])
https://usn.ubuntu.com/281-1/ ([email protected])
http://secunia.com/advisories/19402 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/19955 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/20157 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/20398 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/20671 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/20914 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/21136 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/21465 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/21983 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/22417 (af854a3a-2127-422b-91ae-364da2661108)
http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm (af854a3a-2127-422b-91ae-364da2661108)
http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2006/dsa-1097 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2006/dsa-1103 (af854a3a-2127-422b-91ae-364da2661108)
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDKSA-2006:086 (af854a3a-2127-422b-91ae-364da2661108)
http://www.novell.com/linux/security/advisories/2006-05-31.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2006-0437.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2006-0575.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/427622/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/427753/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/427893/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/428605/30/6210/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/17109 (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2006/1140 (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2006/2554 (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10317 (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/281-1/ (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.