Multiple Linksys Devices Heap Corruption Denial Of Service

BID:6304

Info

Multiple Linksys Devices Heap Corruption Denial Of Service

Bugtraq ID: 6304
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 Heap Corruption Denial Of Service

Several Linksys devices are prone to heap corruption.

Due to insufficient bounds checking when copying user-supplied input to memory, it may be possible to corrupt information stored in heap memory. This issue can be triggered through a malicious HTTP request to a vulnerable device.

This vulnerability may be exploited by an attacker to reboot the vulnerable device. Although unconfirmed, it may also be possible to modify various configuration settings or execute malicious code.

Exploit / POC

Multiple Linksys Devices Heap Corruption Denial Of Service

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Multiple Linksys Devices Heap Corruption Denial Of Service

Solution:
Linksys has released firmware 1.44 and 2.44 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 Heap Corruption Denial Of Service

References:

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