EMC IRM License Server 4.6.1.1995 – Denial of Service
####################################################################### Luigi Auriemma Application: EMC IRM License Server http://www.emc.com Versions: <= 4.6.1.1995 Platforms: Windows Bugs: A] "version compat check" *FIPS NULL pointer B] freezing caused by multiple commands C] NULL pointer caused by commands after invalid version Exploitation: remote Date: 10 Apr 2012 Author: Luigi Auriemma e-mail: aluigi@autistici.org web: aluigi.org ####################################################################### 1) Introduction 2) Bugs 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== From the manual: "The IRM Server is a secure server containing a database that stores the encryption keys needed by authorized users to access protected content. The database also stores policies that specify who can access the information and what they can do with it." ####################################################################### ======= 2) Bugs ======= -------------------------------------------- A] "version compat check" *FIPS NULL pointer -------------------------------------------- The missing *FIPS fields in the "version compat check" command leads to a NULL pointer in execution: 004AB67B . 8D45 E4 LEA EAX,DWORD PTR SS:[EBP-1C] 004AB67E . 50 PUSH EAX 004AB67F . 53 PUSH EBX 004AB680 . 8D85 5C020000 LEA EAX,DWORD PTR SS:[EBP+25C] 004AB686 . 50 PUSH EAX 004AB687 . FF75 C4 PUSH DWORD PTR SS:[EBP-3C] 004AB68A . FF55 E8 CALL DWORD PTR SS:[EBP-18] ; NULL pointer --------------------------------------- B] freezing caused by multiple commands --------------------------------------- Process freezing caused by some continuous malformed commands, for example "batch begin untethered" with an Id composed by line-feeds. Note about the proof-of-concept: manually kill the PoC when everything seems inactive and you no longer receive data from the server so that it will start to consume resources. -------------------------------------------------------- C] NULL pointer caused by commands after invalid version -------------------------------------------------------- Looks like it's possible to cause some NULL pointer dereferences if the initial "version compat check" contains an invalid Version and then are sent other commands. The effect of all the vulnerabilities is the impossibility of using the IRM server, the pvcontrol.exe process remains active but it's no longer usable. ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/irm_1.zip ####################################################################### ====== 4) Fix ====== No fix. ####################################################################### |