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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2008-0181
Linux Kernel 'lbs_process_bss ' Remote Denial of Service Vulnerability

Original Issue Date:December 01, 2008

Severity Rating: HIGH

Systems Affected

  • Linux kernel Versions prior to 2.6.27.5

Overview

A Buffer overflow vulnerability has been reported in Linux kernel libertas subsystem.

Description

Files in the drivers/net/wireless/libertas/ directory implements the support of Libertas WiFi devices. A 802.11 host periodically scans the network, and the access point answers a Beacon Probe Response containing the SSID Service Set IDentifier indicating the BSS Basic Service Set .

The lbs_process_bss function of the drivers/net/wireless/libertas/
scan.c file analyzes these answers. However, if the size of the SSID is larger than 32 bytes, a buffer overflow occurs. This overflow does not lead to code execution. A remote attacker can stop systems with a Libertas device by sending a long WiFi answer.

Solution

Upgrade to version 2.6.27.6
http://kernel.org/pub/linux/kernel/v2.6/patch-2.6.27.6.bz2

Vendor Information

Kernel.org
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=commit;h

References

Kernel.org


http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=commit;h

Security Database
http://www.security-database.com/detail.php?alert=CVE-2008-5134

Secunia
http://secunia.com/advisories/cve_reference/CVE-2008-5134/

SecurityFocus
http://www.securityfocus.com/bid/32484/

CVE Name
CVE-2008-5134

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-2436857

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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