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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux 2.4 Kernel TCP/IP Fragment Reassembly Flaw May Let Remote Users Deny Service
SecurityTracker Alert ID:  1008431
SecurityTracker URL:  http://securitytracker.com/id/1008431
CVE Reference:   CVE-2003-0364   (Links to External Site)
Date:  Dec 10 2003
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.4
Description:   A vulnerability was reported in the Linux kernel in the processing of TCP/IP fragments. A remote user can cause denial of service conditions.

In June 2003, it was reported that a flaw in the TCP/IP fragment reassembly code may allow a remote user to send packets that will cause a large number of hash table collisions, consuming excessive CPU resources on the target system.

This vulnerability is reportedly similar to (but different from) the one reported in CVE CVE-2003-0244.

Impact:   A remote user can cause excessive CPU resources to be consume on the target system.
Solution:   Solutions are available for various distributions. See the Message History for further information.
Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   State error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 10 2003 (Conectiva Issues Fix) Linux 2.4 Kernel TCP/IP Fragment Reassembly Flaw May Let Remote Users Deny Service
Conectiva has released a fix.



 Source Message Contents

Subject:  kernel: CVE-2003-0244


In June 2003, Red Hat reported:

"The TCP/IP fragment reassembly handling allows remote attackers to cause
a denial of service (CPU consumption) via packets that cause a large number
of hash table collisions, a vulnerability similar to CAN-2003-0244. The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the name CAN-2003-0364 to this issue."



 
 


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