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This check can also bypassed so we skip the bk_write() call and move to last part. So, it will initially compare DL with AL to ensure that the lower Byte of EDX (destination pointer) is not less than the lower part of EAX (source pointer) register. Since ECX could store signed integers this check could be bypassed easily leading to the latter routine which is shown below.īRANCH_TO_JMPTBL_ENTRY (L(table_48bytes_fwd), %ecx, 4)īRANCH_TO_JMPTBL_ENTRY (L(table_48_bytes_bwd), %ecx, 4) If ECX is greater than that, it will jump to memmove_bwd(), otherwise it will jump to bk_write_less32bytes_2(). The most important part for us is the next one, it compares the value of ECX (our length argument) with the static value 32. It checks that the source and destination pointers do not match and executes the equivalent routine.
#Exploit db hp ilo 4 code
To exploit this vulnerability the attacker must have control of the length argument which is stored in ECX general purpose register as you can see from the above code snippet. So, the user arguments are stored in the above registers. Since the code is in x86 assembly I will go from the beginning to the end to most of the memcpy(3) code. The exact code is located in sysdeps/i386/i686/multiarch/memcpy-ssse3.S file. The vulnerability was added when the 32-bit memset(3) and memcpy(3) routines were optimized with SSE2/SSSE3 features.Īlthough there are more vulnerable routines here I will be focusing on memcpy(3) from eglibc library. You can read his very detailed analysis here.Īlthough a very well written and complete analysis is already written by the original author of this vulnerability, I will write a blog post mostly for future references. This is an awesome vulnerability reported by c0ntex after having it as a 0day for 1.5 year. Now you can normally access your HP iLO using your web browser… Integrated Lights-Out will reset at the end of the ~]# Modify these to according to your network requirements and reload the new configuration file using the next ~]# hponcfg -f iloconfig_new.cfg
#Exploit db hp ilo 4 update
In our case, we only have to update the network setup which is defined by the following tags. Now you can edit the XML file to change any part of the HP iLO’s configuration you want. RILOE II/iLO configuration successfully written to file ~]# In case you have accidentally made your HP iLO interface unreachable through network, you can export its configuration file using the following ~]# hponcfg -a -w iloconfig.cfg So, HP iLO’s configuration file can be imported or exported as an XML file.
#Exploit db hp ilo 4 install
The first step is to install the HP ProLiant Support Pack (HP PSP) which is a collection of utilities and drivers to manage your server from user space and it is available for all the major enterprise class operating systems.Īmong others, this package includes a utility named ‘hponcfg’ that you can use for many useful tasks such as retriving host ~]# hponcfg -gįirmware Revision = 2.05 Device type = iLO 2 Driver name = hpilo Now to our subject, if you happen to have HP iLO interface you will almost certainly have to deal with some ProLiant server. In my opinion, HP iLO implementation is the best lights-out management technology. It does not correspond to any user ID in the web application and does not store any personally identifiable information.Since a reader requested this due to my previous blog post about DELL iDRAC lights-out management interface.
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