Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

BID:6301

Info

Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

Bugtraq ID: 6301
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: Dec 03 2002 12:00AM
Updated: Dec 03 2002 12:00AM
Credit: Discovery of this vulnerability credited to CORE.
Vulnerable: Linksys EtherFast BEFSRU31 Router 1.43.3
Linksys EtherFast BEFSRU31 Router 1.43
Linksys EtherFast BEFSRU31 Router 1.42.7
Linksys EtherFast BEFSR81 Router 2.42.7
Linksys EtherFast BEFSR81 Router
Linksys EtherFast BEFSR41 Router 1.43.3
Linksys EtherFast BEFSR41 Router 1.43
Linksys EtherFast BEFSR41 Router 1.42.7
Linksys EtherFast BEFSR11 Router 1.43.3
Linksys EtherFast BEFSR11 Router 1.43
Linksys EtherFast BEFSR11 Router 1.42.7
Linksys BEFW11S4 1.43.3
Linksys BEFW11S4 1.4.3
Linksys BEFW11S4 1.4.2 .7
Linksys BEFSX41 1.43.4
Linksys BEFSX41 1.43.3
Linksys BEFSX41 1.43
Linksys BEFN2PS4 1.42.7
Not Vulnerable: Linksys EtherFast BEFSRU31 Router 1.44
Linksys EtherFast BEFSR81 Router 2.44
Linksys EtherFast BEFSR41 Router 1.44
Linksys EtherFast BEFSR11 Router 1.44
Linksys BEFW11S4 1.44
Linksys BEFSX41 1.44

Discussion

Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

Several Linksys Broadband Router devices are prone to a buffer overflow conditions.

The vulnerability occurs due to insufficient allocation of memory for buffers.

An attacker can exploit this vulnerability by issuing an overly long GET request to the vulnerable Linksys device. When the device attempts to process the malformed input, it will be possible to corrupt sensitive memory. This may allow an attacker to change configuration information on the vulnerable device.

Exploit / POC

Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

The following exploit was provided:

Solution / Fix

Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

Solution:
Linksys has released firmware 1.44 for several devices. Users are advised to download the newest firmware.


Linksys EtherFast BEFSR81 Router

Linksys BEFW11S4 1.4.2 .7

Linksys BEFW11S4 1.4.3

Linksys EtherFast BEFSR41 Router 1.42.7

Linksys EtherFast BEFSR11 Router 1.42.7

Linksys EtherFast BEFSRU31 Router 1.42.7

Linksys BEFN2PS4 1.42.7

Linksys EtherFast BEFSR41 Router 1.43

Linksys BEFSX41 1.43

Linksys EtherFast BEFSR11 Router 1.43

Linksys EtherFast BEFSRU31 Router 1.43

Linksys EtherFast BEFSRU31 Router 1.43.3

Linksys BEFW11S4 1.43.3

Linksys EtherFast BEFSR11 Router 1.43.3

Linksys EtherFast BEFSR41 Router 1.43.3

Linksys BEFSX41 1.43.3

Linksys BEFSX41 1.43.4

Linksys EtherFast BEFSR81 Router 2.42.7

References

Multiple Linksys Devices GET Request Buffer Overflow Vulnerability

References:

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