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Security Activity Bulletin

Linux Kernel Datagram Congestion Control Protocol Subsystem Integer Overflow

 
Threat Type:IntelliShield: Applied Mitigation Bulletin
IntelliShield ID:16521
Version:5
First Published:2008 August 26 17:43 GMT
Last Published:2012 December 07 10:44 GMT
Port: Not available
CVE:CVE-2008-3276
BugTraq ID:30704
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:MontaVista Software has re-released security alert and updated software to address the Linux Kernel Datagram Congestion Control Protocol subsystem integer overflow vulnerability.
 

Description
 
Linux Kernel versions prior to 2.6.26.3 contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability exists due to an integer overflow error in the dccp_setsockopt_change() kernel function in net/dccp/proto.c, which is part of the Datagram Congestion Control Protocol (DCCP) subsystem. The vulnerability exists in the handling of feature negotiation options. More specifically, the vulnerability is in the processing of the Change L and Change R options. These options are normally sent in DCCP packets to request specific feature settings between the two systems. An unauthenticated, remote attacker could cause an affected system to panic by establishing a DCCP connection with an affected system and then sending it a packet with a Change L or Change R option set using crafted parameters. If the option parameters can be set such that the kernel variable dccpsf_val is passed a value of less than one byte, a kernel panic could be triggered, resulting in a DoS condition. Attackers may be able to execute arbitrary code, but this impact has not been proven.

Kernel.org confirmed this vulnerability and released an updated version.

Kernel.org has released a summary of changes at the following link: Wed Aug 13 13:48:39 2008. Kernel.org has released an updated version at the following link: Linux Kernel 2.6.26.3 or later.

Debian has released a security advisory and updated packages at the following link: DSA-1636-1

MontaVista Software has released a security alert for registered users on December 6, 2012, at the following link: MontaVista Security Fixes. MontaVista Software has released updated software at the following links:

Pro 5.0
CGE 5.1
Mobilinux 5.0

Red Hat has released a security advisory at the following link: RHSA-2008:0857. Red Hat packages can be updated using the up2date or yum command.

Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
7275/0Linux Kernel DCCP dccp_setsockopt_change Integer OverflowS4512009 Nov 25 
 
Alert History
 
Version 4, October 15, 2012, 12:30 PM: MontaVista Software has released a security alert and updated software to address the Linux Kernel Datagram Congestion Control Protocol subsystem integer overflow vulnerability.

Version 3, October 8, 2008, 8:36 AM: Red Hat has released a security advisory and updated packages to address the Linux Kernel Datagram Congestion Control Protocol subsystem integer overflow vulnerability.

Version 2, September 15, 2008, 9:06 AM: Debian has released a security advisory and updated packages to address the Linux Kernel Datagram Congestion Control Protocol subsystem integer overflow vulnerability.

Version 1, August 26, 2008, 5:43 PM: The Linux Kernel contains a vulnerability in the Datagram Congestion Control Protocol Subsystem that could allow an unauthenticated, remote attacker to cause a denial of service condition. An updated version is available.



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
IntelliShieldSecurity Activity Bulletin Original Release Base

Associated Products:
CentOS ProjectCentOS 5 .0 i386, .0 x86_64, .1 i386, .1 x86_64, .2 i386, .2 x86_64
DebianDebian Linux 4.0 alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, ppc, s390, sparc
MontaVistaMontaVista Linux Professional 5.0 | Mobilinux 5.0 | CGE 5.1
Red Hat, Inc.Red Hat Enterprise MRG for Enterprise Linux 1 ia-32, x86_64
SUSESUSE Linux Enterprise Realtime 10 SP2 x86_64, SP2 x86




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