|
 |
|
Linksys BEF Series Routers Denial of Service Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA11764
|
|
|
Release Date:
|
2004-06-05
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
DoS
|
|
Where:
|
From local network
|
|
Solution Status:
|
Vendor Patch
|
|
| OS: | Linksys BEF series routers
|
|
|
|
Want to know the next time vulnerabilities are fixed in this product?
- Companies can be alerted via email and SMS! |
|
|
Description:
b0f has reported two vulnerabilities in various Linksys BEF series routers, which can be exploited to cause a DoS (Denial of Service).
1) An error within the administrative web interface when attempting to authenticate a user can be exploited to crash the router by passing overly long strings (about 150 bytes each) to the "sysPasswd" and "sysPasswdConfirm" parameters in "Gozila.cgi".
2) A similar error also within the administrative web interface can be exploited by passing an overly long string (about 350 bytes) to the "DomainName" parameter in "Gozila.cgi".
Successful exploitation crashes the network device. Reportedly, it also makes it impossible for an administrator to log in even after reboots and therefore requires a factory reset to regain proper functionality.
The vulnerabilities have been reported in the following products:
* Linksys BEFSR41 v1/v2 (firmware 1.45.7 and 1.44.2z and possibly prior)
* Linksys BEFSR41 v3
* Linksys BEFSRU31
* Linksys BEFSR11
* Linksys BEFSX41
* Linksys BEFSR81 v2/v3
* Linksys BEFW11S4 v3
* Linksys BEFW11S4 v4
Solution:
Grant only access to the administrative web interface from dedicated management systems.
The latest firmware releases for the following products reportedly address the vulnerabilities:
* BEFSR41 v3
* BEFSX41
* BEFW11S4 v3
* BEFW11S4 v4
Provided and/or discovered by:
b0f
|
|
|
|
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
|
|
|
6 Related Secunia Security Advisories
|
|
|
1. Linksys BEFVP41 IP Option Length Denial of Service
|
|
2. Linksys BEFSR41 Connection Handling Denial of Service
|
|
3. Linksys Routers Administrative Web Interface Access Security Issue
|
|
4. Linksys BEF Series Routers DHCP Vulnerability
|
|
5. Linksys routers Denial of Service
|
|
6. Linksys DSL Router Denial of Service
|
|
|
Send Feedback to Secunia
|
|
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
|
|
|
|
|
|
Secunia PSI
Scan | Patch | Track
Free Download
|
|
|
Secunia Poll
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
