10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.028 Low
EPSS
Percentile
90.7%
Various D-Link routers allow administrative web actions if the HTTP request contains a specific User-Agent string. This backdoor allows an attacker to bypass password authentication and access the router’s administrative web interface. Planex and Alpha Networks devices may also be affected.
CVE-2013-6026:
According to security researcher Craig Heffner, the firmware for various D-Link routers contains a backdoor that allows unauthenticated remote users to bypass the routers’ password authentication mechanism. A router’s internal web server will accept and process any HTTP requests that contain the User-Agent string “xmlset_roodkcableoj28840ybtide” without checking if the connecting host is authenticated.
D-Link has confirmed that the affected D-Link routers disable web configuration from the WAN by default.
According to D-Link, the following D-Link routers are affected:
* DIR-100
* DIR-120
* DI-624S
* DI-524UP
* DI-604S
* DI-604UP
* DI-604+
* TM-G5240
According to the original vulnerability report, the following Planex routers are likely affected:
* BRL-04R
* BRL-04UR
* BRL-04CW
It appears that Alpha Networks may be the OEM for routers branded by D-Link and Planex (and probably other vendors). It is not clear where in the supply chain the backdoor was added, so routers from any of these vendors may be affected.
An unauthenticated remote attacker can take any action as an administrator using the remote management web server.
D-Link is maintaining a page to inform users of this issue and provide updates as patches are released.
Restrict Access
Restrict access to the administrative web server by disabling remote management features or by blocking HTTP requests on the external WAN interface. The administrative web server may listen on ports 80/tcp or 8080/tcp.
D-Link has confirmed that the affected D-Link routers disable web configuration from the WAN by default. There is some evidence that at least one ISP may have deployed vulnerable routers with the remote WAN management enabled.
248083
Filter by status: All Affected Not Affected Unknown
Filter by content: __ Additional information available
__ Sort by: Status Alphabetical
Expand all
Javascript is disabled. Click here to view vendors.
Notified: October 16, 2013 Updated: October 17, 2013
Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Updated: October 17, 2013
Unknown
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Updated: October 17, 2013
Unknown
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Group | Score | Vector |
---|---|---|
Base | 8.3 | AV:A/AC:L/Au:N/C:C/I:C/A:C |
Temporal | 7.5 | E:F/RL:W/RC:C |
Environmental | 5.6 | CDP:ND/TD:M/CR:ND/IR:ND/AR:ND |
Thanks to Craig Heffner of /DEV/TTYS0 for reporting this vulnerability.
This document was written by Todd Lewellen.
CVE IDs: | CVE-2013-6026, CVE-2013-6027 |
---|---|
Date Public: | 2013-10-12 Date First Published: |